Tratamiento de las infecciones hospitalarias por staphylococcus aureus meticilino resistente / Treatment of hospital-acquired methicillin-resistant staphylococcus aureus infections / Tratamento de infecções por Staphylococcus aureus resistentes à meticilina, adquiridas em hospitais

Introducción: la infección por Staphylococcus aureus meticilino resistente, una de las principales bacterias causantes de infecciones hospitalarias, se ha convertido en una preocupación mundial dada la alta tasa de morbilidad y mortalidad que produce. La resistencia bacteriana es un factor que agrava la problemática de infecciones hospitalarias y se asocia fundamentalmente al uso inadecuado de antibióticos. El uso prudente de los mismos ayuda a controlar la resistencia bacteriana, sin embargo, cada vez se detectan más cepas resistentes a diversos antibióticos. Se realiza una revisión de tratamientos antibióticos disponibles para las infecciones hospitalarias producidas por Staphylococcus aureus meticilino resistente en paciente adulto, con la finalidad de proporcionar una guía sobre los mismos, que permita un uso racional de los antibióticos disponibles evitando así que se continúe desarrollando el fenómeno de resistencia bacteriana. Metodología: se realizó un estudio observacional, descriptivo, de tipo revisión literaria, restringiéndose la búsqueda a guías de práctica clínica. Para conocer las guías existentes en Uruguay se consultó la Cátedra de Enfermedades Infecciosas de la Facultad de Medicina, Universidad de la República y en el Ministerio de Salud Pública. Se encontraron y analizaron guías de diferentes países. Existe acuerdo en los lineamientos generales del tratamiento farmacológico de las infecciones hospitalarias por Staphylococcus aureus meticilino resistente. Resultados: en Uruguay no existen guías propias de tratamiento de las infecciones hospitalarias por Staphylococcus aureus meticilino resistente. Se utiliza como referencia la guía publicada por la Infectious Diseases Society of America. Discusión: algunos de los antibióticos recomendados en las guías analizadas no se encuentran disponibles en nuestro país, como es el caso de daptomicina, telavancina y cloxacilina. En particular, el no disponer de daptomicina podría llegar a dificultar el tratamiento de infecciones en las cuales la CIM de vancomicina sea mayor a 1.5 mg/L. Conclusiones: por lo tanto, se considera conveniente y necesario pautar el tratamiento de dichas infecciones, acorde a las posibilidades, a la epidemiología de nuestro país y a los patrones de resistencia a ésta bacteria, para unificar la práctica clínica y hacer un uso racional de los antibióticos de manera de evitar promover el fenómeno de resistencia microbiana.

Introduction: infection by methicillin-resistant Staphylococcus aureus, one of the main bacteria causing hospital infections, has become a worldwide concern due to the high morbidity and mortality rate it produces. Bacterial resistance is a factor that aggravates the problem of hospital infections and is mainly associated with the inappropriate use of antibiotics. The prudent use of antibiotics helps to control bacterial resistance; however, more and more strains resistant to different antibiotics are being detected. A review of available antibiotic treatments for hospital infections caused by methicillin-resistant Staphylococcus aureus in adult patients was carried out in order to provide a guide for a rational use of available antibiotics, thus avoiding further development of the phenomenon of bacterial resistance. Methodology: an observational, descriptive, literature review type study was carried out, restricting the search to clinical practice guidelines. In order to know the existing guidelines in Uruguay, the Department of Infectious Diseases of the School of Medicine, University of the Republic and the Ministry of Public Health were consulted. Guidelines from different countries were found and analyzed. There is agreement on the general guidelines for pharmacological treatment of hospital infections caused by methicillin-resistant Staphylococcus aureus. Results: in Uruguay there are no guidelines for the treatment of hospital infections caused by methicillin-resistant Staphylococcus aureus. The guidelines published by the Infectious Diseases Society of America are used as a reference. Discussion: some of the antibiotics recommended in the guidelines analyzed are not available in our country, as is the case of daptomycin, telavancin and cloxacillin. In particular, the unavailability of daptomycin could make the treatment of infections in which the MIC of vancomycin is higher than 1.5 mg/L more difficult. Conclusions: therefore, it is considered convenient and necessary to establish guidelines for the treatment of such infections, according to the possibilities, to the epidemiology of our country and to the resistance patterns to this bacterium, in order to unify clinical practice and make a rational use of antibiotics so as to avoid promoting the phenomenon of microbial resistance.

Introdução: a infecção por Staphylococcus aureus resistente à meticilina, uma das principais bactérias causadoras de infecções hospitalares, tornou-se uma preocupação mundial devido à alta taxa de morbidade e mortalidade que ela causa. A resistência bacteriana é um fator que agrava o problema das infecções adquiridas nos hospitais e está principalmente associada ao uso inadequado de antibióticos. O uso prudente de antibióticos ajuda a controlar a resistência bacteriana, entretanto, cada vez mais estirpes resistentes a vários antibióticos estão sendo detectadas. É realizada uma revisão dos tratamentos antibióticos disponíveis para infecções hospitalares causadas por Staphylococcus aureus resistente à meticilina em pacientes adultos, com o objetivo de fornecer um guia para o uso racional dos antibióticos disponíveis, evitando assim o desenvolvimento posterior do fenômeno de resistência bacteriana. Metodologia: foi realizado um estudo observacional, descritivo, do tipo revisão de literatura, restringindo a busca às diretrizes da prática clínica. O Departamento de Doenças Infecciosas da Faculdade de Medicina da Universidade da República e o Ministério da Saúde Pública foram consultados para as diretrizes existentes no Uruguai. Foram encontradas e analisadas diretrizes de diferentes países. Há acordo sobre as diretrizes gerais para o tratamento farmacológico de infecções hospitalares causadas por Staphylococcus aureus resistente à meticilina. Resultados: no Uruguai não há diretrizes para o tratamento de infecções por Staphylococcus aureus resistentes à meticilina adquiridas em hospitais. As diretrizes publicadas pela Sociedade de Doenças Infecciosas da América são usadas como referência. Discussão: alguns dos antibióticos recomendados nas diretrizes analisadas não estão disponíveis na Espanha, tais como daptomicina, telavancina e cloxacilina. Em particular, a indisponibilidade da daptomicina poderia dificultar o tratamento de infecções nas quais a MIC da vancomicina é maior que 1,5 mg/L. Conclusões: portanto, considera-se conveniente e necessário estabelecer diretrizes de tratamento para estas infecções, de acordo com as possibilidades, a epidemiologia de nosso país e os padrões de resistência a esta bactéria, a fim de unificar a prática clínica e fazer uso racional dos antibióticos, a fim de evitar a promoção do fenômeno da resistência microbiana.

Infección nosocomial en Cuidados Intensivos del Hospital Universitario Clínico Quirúrgico Comandante Faustino Pérez Hernández, de Matanzas / Nosocomial infection in the Intensive Care Unit of the Teaching Clinic-Surgical Hospital Faustino Pérez Hernández, of Matanzas

RESUMEN Introducción: la diseminación de microorganismos multirresistentes en el hospital, constituye un importante problema epidemiológico y terapéutico que afecta especialmente a pacientes de la Unidad de Cuidados Intensivos. Objetivo: escribir el comportamiento de las infecciones nosocomiales y la resistencia antimicrobiana en la Unidad de Cuidados Intensivos. Materiales y métodos: se realizó un estudio de tipo descriptivo, observacional y prospectivo en la Unidad de Cuidados Intensivos del Hospital Universitario Clínico Quirúrgico Comandante Faustino Pérez Hernández, durante el primer semestre de 2020. El universo estuvo constituido por 102 pacientes que ingresaron en la Unidad de Cuidados Intensivos en el período estudiado, a los que se les realizó estudios microbiológicos. Las variables analizas fueron: causas de ingreso, edad, infecciones nosocomiales, neumonía en ventilados, gérmenes, resistencia antimicrobiana y mortalidad. Se expresaron en tablas y gráficos porcentuales. Resultados: el sexo masculino presentó mayor número de infección nosocomial respecto al femenino, en edades diferentes de la vida. La causa más frecuente de ingreso fue el politrauma. El sitio más común de infección nosocomial fue la vía respiratoria. Predominaron gérmenes como los bacilos gramnegativos fermentadores y las enterobacterias. Antibióticos como los inhibidores de las betalactamasas, otras penicilinas, quinolonas, cefalosporinas, aminoglucósidos y meropenen han adquirido un mayor porciento de resistencia. Conclusiones: la infección nosocomial por bacterias multirresistentes a los antibióticos estratégicos, es un problema dentro de la Unidad de Cuidados Intensivos asociado a la ventilación mecánica, que provoca una elevada mortalidad (AU).

ABSTRACT Introduction: the spread of multi-resistant microorganisms in the hospital is a major epidemiological and therapeutic problem that particularly affects critical patients admitted to the Intensive Care Unit. Objective: to describe the behavior of nosocomial infections and antimicrobial resistance in the Intensive Care Unit. Materials and Methods: a descriptive, observational and prospective study was carried out in the Intensive Care Unit of the Teaching Clinic-Surgical Hospital Faustino Pérez Hernández, during the first half of 2020. The universe was formed by 102 patients who entered the Intensive Care Unit during the studied period, to whom microbiological studies were carried out. The analyzed variables were the following: causes of admission, age, nosocomial infections, ventilator-associated pneumonia, germs, antimicrobial resistance and mortality. The results were expressed in tables and percentage charts. Results: Male sex showed the highest number of nosocomial infection compared to the female, at different ages of life. The most common cause of admission was polytrauma. The most common site of nosocomial infection was the airway. Germs like fermentative Gram-negative bacilli and enterobacteria predominated. Antibiotics such as beta-lactamase inhibitors, other kinds of penicillin, quinolones, cephalosporin, aminoglycosides and meropenen have acquired a higher percent of resistance. Conclusions: nosocomial infection caused by bacteria that have developed multi-resistance to strategic antibiotics is a problem within the Intensive Care Unit, associated to mechanical ventilation, and leads to high mortality (AU).

Antimicrobial use for treatment of healthcare-associated infections and bacterial resistance in a reference neonatal unit

Abstract Objective The use of broad-spectrum antimicrobials, such as third and fourth-generation, are responsible for emergence of multidrug-resistant microorganisms in neonatal units. Furthermore, antimicrobial daily doses are not standardized in neonatology. This study aimed to investigate the association between the use of antimicrobial broad spectrum to bacterial sensitivity profile in a referral unit of neonatal progressive care. Methods This is a cohort study conducted in a referral neonatal progressive care unit from January 2008 to December 2016. The data of all hospitalized neonates was collected daily. The infection criteria used were the standardized national criteria, based on definitions of Center for Diseases Control and Prevention. In this study, the use of antimicrobials was evaluated as antimicrobial-day (ATM-day) and the ratio of multidrug-resistant microorganisms per 1000 ATM-day of broad spectrum was also calculated. The study was approved by the Institutional Review Board of the Universidade Federal de Minas Gerais (ETIC 312/08 e CAAE 58973616.2.0000.5149). Results From 2008 to 2016, 2751 neonates were hospitalized, corresponding to 60,656 patient-days. The ratio of multidrug-resistant microorganisms per 1000 ATM-day of broad spectrum was 1,3 in the first period and 4,3 in the second period (p = 0,005). Conclusion It was observed that use of broad-spectrum antimicrobials, especially those with coverage for Gram-negative bacteria, was associated with an increase of multidrug-resistant bacteria.

Clinical and epidemiological aspects of Candidemia in eight medical centers in the state of Parana, Brazil: Parana Candidemia Network

ABSTRACT Objectives: Candida spp. has been reported as one of the common agents of nosocomial bloodstream infections and is associated with a high mortality. Therefore, this study evaluated the clinical findings, local epidemiology, and microbiological aspects of candidemia in eight tertiary medical centers in the state of Parana, South of Brazil. Methods: In this study, we reported 100 episodes of candidemia in patients admitted to eight different hospitals in five cities of the state of Parana, Brazil, using data collected locally (2016 and 2017) and tabulated online. Results: The incidence was found to be 2.7 / 1000 patients / day and 1.2 / 1000 admissions. C. albicans was responsible for 49% of all candidemia episodes. Cancer and surgery were the two most common underlying conditions associated with candidemia. The mortality rate within 30 days was 48%, and removal of the central venous catheter (p = 0.029) as well as empirical or prophylactic exposure to antifungals were both related to improved survival (p = 0.033). Conclusions: This study highlights the high burden and mortality rates of candidemia in hospitals from Parana as well as the need to enhance antifungal stewardship program in the enrolled medical centers.

Pre- and post-COVID-19 evaluation of antimicrobial susceptibility for healthcare-associated infections in the intensive care unit of a tertiary hospital

Abstract INTRODUCTION: Antimicrobial resistance has worsened since the onset of COVID-19. METHODS: This study involved patients admitted to the adult intensive care unit (ICU) of a tertiary hospital. Pre- and post-COVID-19 data were analyzed. The healthcare-related infections (HCRIs) reported between January 2018 and January 2020 and during the pandemic between February and July 2020 were compared. RESULTS: Antimicrobial resistance increased during the pandemic, especially for Klebsiella pneumoniae isolates, with a rate increase from 5% to 50% for Polymyxin B. CONCLUSIONS: The susceptibilities of the main pathogens associated with HCRIs in the ICU changed and should be considered in managing severe COVID-19.

Total antibiotic use in a state-wide area and resistance patterns in Brazilian hospitals: an ecologic study

ABSTRACT Introduction: Use of antibiotic and bacterial resistance is the result of a complex interaction not completely understood. Objectives: To evaluate the impact of entire antimicrobial use (community plus hospitals) on the incidence of bloodstream infections in intensive care units adjusted by socioeconomic factors, quality of healthcare, and access to the healthcare system. Design: Ecologic study using a hierarchical spatial model. Setting: Data obtained from 309 hospitals located in the state of São Paulo, Brazil from 2008 to 2011. Participants: Intensive care units located at participant hospitals. Outcome: Hospital acquired bloodstream infection caused by MDRO in ICU patients was our primary outcome and data were retrieved from São Paulo Health State Department. Socioeconomic and healthcare indexes data were obtained from IBGE (Brazilian Foundation in charge of national decennial census) and SEADE (São Paulo Planning and Development Department). Information on antimicrobial sales were obtained from IMS Brazil. We divided antibiotics into four different groups (1-4). Results: We observed a direct association between the use of group 1 of antibiotics and the incidences of bloodstream infections caused by MRSA (1.12; 1.04-1.20), and CR-Acinetobacter sp. (1.19; 1.10-1.29). Groups 2 and 4 were directly associated to VRE (1.72; 1.13-2.39 and 2.22; 1.62-2.98, respectively). Group 2 was inversely associated to MRSA (0.87; 0.78-0.96) and CR-Acinetobacter sp. (0.79; 0.62-0.97). Group 3 was inversely associated to Pseudomonas aeruginosa (0.69; 0.45-0.98), MRSA (0.85; 0.72-0.97) and VRE (0.48; 0.21-0.84). No association was observed for third generation cephalosporin-resistant Klebsiella pneumoniae and Escherichia coli. Conclusions: The association between entire antibiotic use and resistance in ICU was poor and not consistent for all combinations of antimicrobial groups and pathogens even after adjusted by socioeconomic indexes. Selective pressure exerted at the community level seemed not to affect the incidences of MDRO infection observed in intensive care setting.

Factores relacionados con letalidad en pacientes con bacteriemia hospitalizados por patología médica en una institución de tercer nivel en Colombia, 2014-2016 / Case fatality rate-related factors in patients with bacteremia hospitalized due medical conditions in an institution of third level in Colombia, 2014-2016

Resumen Introducción: Las infecciones del torrente sanguíneo son un problema creciente y actualmente son una amenaza para la salud pública. La bacteriemia representa aproximadamente 15% de todas las infecciones nosocomiales y afecta a 1% de los pacientes hospitalizados. Objetivo: Describir las características clínicas, epidemiológicas y microbiológicas de episodios de bacteriemia nosocomial ocurridos en un hospital colombiano. Pacientes y Métodos: Estudio retrospectivo, observacional, de corte transversal, con inclusión de pacientes adultos, hospitalizados por el Servicio de Medicina Interna en el Hospital Universitario de Santander, Bucaramanga, Colombia, durante los años 2014 a 2016. El protocolo fue aprobado por el Comité de Ética en Investigación de la Universidad Industrial de Santander. Resultados: Se revisaron 450 historias clínicas, con 148 pacientes y 182 aislados microbianos. Los antecedentes más frecuentes fueron: hipertensión arterial (46,6%) e infección por VIH (29,7%). El sistema vascular y urinario ocuparon los sitios anatómicos más frecuentes (37,3 y 38,3%, respectivamente). La letalidad fue de 29%. Los patógenos más frecuentemente aislados fueron: Klebsiella pneumoniae, Acinetobacter baumannii, Escherichia coli, Pseudomonas aeruginosa (en suma: 49,8%) y Staphylococcus aureus 12,1%. El análisis multivariado mostró relación de la anemia con mortalidad intrahospitalaria (OR = 17,3; IC95% 2,95-102,0). Conclusiones: La bacteriemia es una infección frecuente durante la atención hospitalaria que presenta gran mortalidad. Es destacable el predominio de aislados de enterobacterias multiresistentes. El antecedente de infección por VIH es uno de los más frecuentes el que amerita ser evaluado como grupo de riesgo.

Abstract Background: Bloodstream infections are an increasing problem and currently represent a threat to public health, overcoming diseases such as HIV. Bacteremia accounts for approximately 15% of all nosocomial infections and affects 1% of all hospitalized patients. Aim: To describe the clinical, epidemiological and microbiological characteristic of episodes of nosocomial bacteremia occurring in a Colombian hospital. Methods: Retrospective, observational, cross-sectional study including adult patients, hospitalized in the internal medicine unit at the University Hospital of Santander, Bucaramanga, Colombia, during years 2014 to 2016, who met the criteria of the CDC for bloodstream infection. The protocol was approved by the Hospital Ethics Committee and by the Research Ethics Committee of the Industrial University of Santander. Results: We reviewed 450 clinical records with 148 patients and 182 microbiological isolates. 53% were male. The most frequent comorbidities were: high blood pressure (46.6%), HIV infection (29.7%). The vascular and urinary systems were the most frequent anatomical sites as the source of the infection (respectively 37.3% and 38.3%). Case fatality rate was 29%. The pathogens most frequently isolated were: Klebsiella pneumoniae, Acinetobacter baumannii, Escherichia coli, Pseudomonas aeruginosa (globally: 49.8%) and Staphylococcus aureus 12.1%. The multivariate analysis showed a relationship between anemia and in-hospital mortality (OR = 17.3, 95%CI 2.95-102.0). Conclusions: Bacteremia is a frequent infection during hospital care that presents high mortality. It is noteworthy the predominance of Enterobacteriaceae isolates with broad profiles of resistance. The history of HIV infection is one of the most frequent which deserves to be evaluated as a risk group.

Multidrug-resistant Acinetobacter baumannii outbreaks: a global problem in healthcare settings

Abstract INTRODUCTION: The increase in the prevalence of multidrug-resistant Acinetobacter baumannii infections in hospital settings has rapidly emerged worldwide as a serious health problem. METHODS: This review synthetizes the epidemiology of multidrug-resistant A. baumannii, highlighting resistance mechanisms. CONCLUSIONS: Understanding the genetic mechanisms of resistance as well as the associated risk factors is critical to develop and implement adequate measures to control and prevent acquisition of nosocomial infections, especially in an intensive care unit setting.

Perfil fenotípico de resistência à colistina e tigeciclina em um hospital público no Brasil / Phenotypical profile of colistin and tigecycline resistance in a public hospital in Brazil / Perfil fenotípico de resistencia a la colistina y tigeciclina en un hospital público de Brasil

Justificativa e objetivos: Infecções Relacionadas à Assistência à Saúde (IRAS) causadas por bacilos Gram negativos multirresistentes (BGN-MDR) são consideradas um problema de saúde pública e um impacto nas taxas de mortalidade nas Unidades de Terapia Intensiva (UTI). O objetivo deste estudo foi verificar o perfil fenotípico de resistência à colistina e à tigeciclina, consideradas como último recurso terapêutico aos BGN-MDR. Métodos: Os dados foram coletados nas fichas de busca ativa do serviço de controle de infecções e prontuários médicos de pacientes internados em duas UTIs de um hospital público de Joinville, entre janeiro de 2016 e junho de 2017. Resultados: Ocorreram 256 IRAS por BGN, acometendo principalmente o gênero masculino (62%), com mediana de idade de 65 anos. Entre os BGN, 37% expressaram MDR; sendo as espécies mais frequentes: Klebsiella pneumoniae e (47%), Acinetobacter baumannii (23%) e Stenotrophomonas maltophilia (11%). A resistência de BGN-MDR à colistina e tigeciclina foi de 5% e de 12%, respectivamente; 5% dos isolados foram resistentes aos dois antibióticos. A taxa de óbito entre os pacientes com IRAS por BGN-MDR resistentes à colistina foi mais alta (60%) que aquelas à tigeciclina (45%). Conclusão: K. pneumoniae e A. baumannii produtores de carbapenemases, resistentes a colistina e tigeciclina prevaleceram entre os BGN-MDR, e estiveram associadas a maioria dos óbitos. Essas observações, junto com o alto uso de carbapenêmicos na terapia empírica, mostra a necessidade do uso racional de antimicrobianos.(AU)

Background and objectives: Healthcare-associated Infections (HAIs) caused by multidrug-resistant Gram-negative bacilli (GNB-MDR) are considered a public health problem and have an impact on mortality rates in Intensive Care Units (ICU). The aim of this study was to verify the phenotypic profile of resistance to colistin and tigecycline, considered as the last antimicrobial choice to treat BGNMDR infections. Methods: Data were collected on the active search records of the infection control service and medical records of patients admitted to two ICUs at a public hospital in Joinville between January 2016 and June 2017. Results: There were 256 HAIs caused by GNB, mainly affecting males (62%), with a median age of 65 years. Among GNBs, 37% expressed MDR; the most frequent species were: Klebsiella pneumoniae (47%), Acinetobacter baumannii (23%) and Stenotrophomonas maltophilia (11%). The resistance of GNB-MDR to colistin and tigecycline was 5% and 12%, respectively; 5% of the isolates were resistant to both antibiotics. The death rate among patients with HAIs caused by colistin-resistant GNB-MDR was higher (60%) than those to tigecycline (45%). Conclusion: Carbapenemase-producing K. pneumoniae and A. baumannii, resistant to colistin and tigecycline, prevailed among GNB-MDRs, and were associated with most deaths. These observations, coupled with the high use of carbapenems in empirical therapy, show the need for rational use of antimicrobials.(AU)

Justificación y objetivos: Las Infección nosocomial (IHs) causadas por bacilos Gram negativos multirresistentes (BGN-MDR) se consideran un problema de salud pública y un impacto en las tasas de mortalidad en las Unidades de Terapia Intensiva (UTI). El objetivo de este estudio fue verificar el perfil fenotípico de resistencia a la colistina ya la tigeciclina, consideradas como último recurso terapéutico a los BGN-MDR. Métodos: Los datos fueron recolectados en las fichas de búsqueda activa del servicio de control de infecciones y prontuarios médicos de pacientes internados en dos UTIs de un hospital público de Joinville, entre enero de 2016 y junio de 2017. Resultados: Ocurrieron 256 IHs por BGN, que afectan principalmente al género masculino (62%), con mediana de edad de 65 años. Entre los BGN, el 37% expresó MDR; siendo las especies más frecuentes: Klebsiella pneumoniae (47%), Acinetobacter baumannii (23%) y Stenotrophomonas maltophilia (11%). La resistencia de BGN-MDR a la colistina y tigeciclina fue del 5% y del 12%, respectivamente; 5% de los aislados fueron resistentes a los dos antibióticos. La tasa de muerte entre los pacientes con IH causadas por los BGN-MDR resistentes la colistina fue más alta (60%) que aquellas a tigeciclina (45%). Conclusión: K. pneumoniae y A. baumannii productoras de carbapenemases, resistentes la colistina y la tigeciclina, fueron más frecuentes entre los BGN-MDR y su asociación estuvo presente en la mayoría de las muertes. Estas observaciones, junto con el alto uso de carbapenems en la terapia empírica, muestran la necesidad de un uso racional de los antimicrobianos.(AU)

Distribution of extended-spectrum beta-lactamase TEM and CTX-M resistance genes among Proteus species Isolated in Sudan

Proteus species are found in the human intestinal tract as part of normal flora. Proteus species are also found in multiple environmental habitats, including long-term care facilities and hospitals, and can cause both community and nosocomial infections. For a long time Proteus was known to be susceptible to beta-lactam antibiotics but nowadays they become resistant. The aim of this study was to detect the Extended-spectrum beta-lactamase (ESBL) TEM and CTX-M genes in 90 Proteus species isolated from urine and wound swabs, obtained from different hospitals in Khartoum state, Sudan, from January to August 2018. Antimicrobial sensitivity was carried out using the following set of antibiotics: amoxiclav, ceftazidime, gentamicin, meropenem, cefotaxime, ciprofloxacin, amoxicillin, ceftriaxone and cotrimoxazole. ESBL producing strains were detected by double disc diffusion synergy test and the resistance genes TEM and CTX-M were detected by Polymerase Chain Reaction (PCR). Antibiotic resistance was found: amoxicillin 40 percent, ceftazidime 25.6 percent, ceftriaxone 23.3 percent, gentamicin 22.2 percent, cotrimoxazole 21.1 percent, and cefotaxime 18.9 percent. Most of the isolates were sensitive to meropenem 92.2 percent and ciprofloxacin 86.7 percent. In double-disk diffusion synergy test, 20 isolates (22.2 percent) were found to be positive for ESBL. The PCR demonstrated that TEM gene was present in 18 isolates (90 percent). It was present alone in 11 isolates (55 percent) and in combination with CTX-M gene in seven isolates (35 percent). The percentage of ESBL producing strains of Proteus was 23.5 percent. This percentage is a bit lower than in previous studies in Sudan. In conclusion; it seems that the CTX-M gene is emerging among Proteus species in SudanAU)

Las especies de Proteus se encuentran en el tracto intestinal humano y forman parte de su flora normal. También se localizan en el medio ambiente y otros hábitats, incluyendo hospitales y diversas instituciones de salud, provocando tanto infecciones en la comunidad como nosocomiales. Durante mucho tiempo, las especies de Proteus fueron susceptibles a los antibióticos betalactámicos, pero actualmente se han tornado resistentes. El propósito de este estudio fue detectar genes de resistencia betalactamasas de espectro extendido (BLEE) TEM y CTX-M, en 90 especies de Proteus aisladas en orina y heridas, provenientes de diversos hospitales del estado de Jartum, Sudán, entre enero y agosto de 2018. La sensibilidad antimicrobiana se determinó con el siguiente juego de antibióticos: amoxiclav, ceftazidima, gentamicina, meropenem, cefotaxima, ciprofloxacina, amoxicilina, ceftriaxona y cotrimoxasol. Las cepas productoras de BLEE se detectaron mediante la técnica de sinergia de doble disco, y los genes de resistencia TEM y CTX-M mediante Reacción en Cadena de la Polimerasa (PCR). Se encontró resistencia antibiótica: amoxicilina 40 por ciento, ceftazidima 25,6 por ciento, ceftriaxona 23,3 por ciento, gentamicina 22,2 por ciento, cotrimoxasol 21,1 por ciento y cefotaxima 18,9 por ciento. La mayor parte de los aislamientos fueron sensibles a meropenem (92,2 por ciento) y ciprofloxacina (86,7 por ciento). Con la técnica de sinergia de doble disco se detectó positividad a BLEE en 20 aislamientos (22,2 por ciento). Mediante PCR se demostró que el gen que codifica TEM estaba presente en 18 aislamientos (90 por ciento); de forma aislada en 11 aislamientos (55 por ciento) y combinado con el gen CTX-M en los otros siete (35 por ciento). El porcentaje de cepas de Proteus productoras de BLEE fue de 23,5 por ciento. Este valor es ligeramente inferior que los detectados en estudios previos en Sudán. En conclusión, hay evidencias de que el gen CTX-M está emergiendo entre las especies de Proteus en Sudán(AU)

Infección por Clostridium difficile: descripción de las cepas NAP1/027 y de otros serotipos en un centro de alta complejidad de Cali, Colombia, 2012-2015 / Clostridium difficile infection: Description of NAP1/027 and non NAP1/027 strains in a high complexity center in Cali, Colombia, 2012-2015

Resumen Introducción. Clostridium difficile ocasiona infecciones hospitalarias que resultan en altas tasas de morbilidad y mortalidad. La cepa NAP1/027 se ha asociado con una mayor producción de toxinas y con una mayor gravedad, lo que aumenta la carga de la enfermedad. Objetivo. Describir la epidemiología de las infecciones asociadas con C. difficile y las características de la cepa NAP1/027. Materiales y métodos. Se hizo un estudio observacional basado en la revisión de las historias clínicas de los pacientes con muestras de heces positivas para C. difficile identificadas mediante la prueba Xpert™ entre el 2012 y el 2015 en un hospital de alta complejidad. La gravedad de la enfermedad se evaluó con el índice ATLAS. Resultados. Se incluyeron 42 casos de pacientes infectados, 9 de los cuales fueron positivos para la cepa NAP1/027. El uso de antibióticos antes de la infección durante más de siete días fue más frecuente en los casos de pacientes con muestras negativas para NAP1/027. En la mitad de los pacientes, la duración de la diarrea fue mayor de cinco días y no hubo diferencias según el tipo de cepa (p>0,05). Los casos de pacientes positivos para la cepa NAP1/027 se caracterizaron por presentar deposiciones fétidas y sanguinolentas. La gravedad de la infección fue similar entre los grupos. Conclusión. Se comprobó la circulación de la cepa NAP1/027, pero su presencia no supuso diferencias clínicas significativas con respecto a otras cepas, lo cual podría deberse al limitado número de pacientes en este estudio. Sin embargo, su presencia debe alertar a los médicos y a las instituciones de salud, dada su frecuente asociación con la gravedad de la infección y la mortalidad.

Abstract Introduction: Clostridium difficile causes nosocomial infections leading to high morbidity and mortality. The NAP1/027 strain is associated with a higher toxin production and disease severity, which increases the load of the disease. Objective: To describe the epidemiology of the infections associated with C. difficile and the characteristics related to the NAP1/027 strain. Materials and methods: This was an observational study based on the revision of clinical registries of patients with fecal samples that were positive for C. difficile identified by the Xpert test™ between 2012 and 2015 in a high complexity institution. The severity of the disease was evaluated by means of the ATLAS score. Results: We included 42 infected cases, 9 of which were positive for the NAP1/027strain. The use of antibiotics previous to the infection for more than seven days was more frequent in patients with negative results for NAP1/027. The duration of diarrhea in half of the patients was longer than five days and there were no differences according to the type of strain (p>0.05). Positive cases for the NAP1/027 strain were characterized by presenting fetid and bloody stools. The severity of the infection was similar between the groups. Conclusions: In Colombia, the NAP1/027 strain circulates without significant clinical differences, which could be due to the limited number of patients. Nevertheless, the existence of NAP1/027 should alert physicians and health institutions because of its high association with severity and mortality.

Exploration of Mahuang Fuzi Xixin Decoction formula syndromes based on severe cases of critical care and its application for nosocomial infection in critical care medicine including hyperpyrexia after tracheotomy and severe pain accompanied by acute myocardial infarction and diabetic peripheral neuropathy / 中国中药杂志

Mahuang Fuzi Xixin Decoction recorded in Treatise on Febrile Diseases by Zhang Zhongjing in the Han Dynasty have been widely used in treating Yang deficiency and exogenous wind-cold syndrome by traditional Chinese medicine physicians for thousands of years. The indications of Mahuang Fuzi Xixin Decoction include bradyarrhythmia,sinus bradycardia,sick sinus node syndrome,senile exogenous,asthmatic cold,rhinitis,bronchial asthma,optic neuritis,optic atrophy,sudden blindness,sudden onset of cough,laryngeal obstruction,migraine,joint pain,low back pain,insomnia,shock,heart failure,renal failure,accompanied by fever or nosocomial infection,and hyperpyrexia after tracheotomy; dark complexion,chills,cold limbs,listlessness,fatigue,insomnia,lack of thirst,liking hot drinks,slightly swollen limbs or whole body,pale fat tongue,greasy fur,and deep pulse. Mahuang Fuzi Xixin Decoction is a potential drug for Shaoyin disease complicated with fever and pain. Tracheal intubation is an artificial ephedrine syndrome. It is necessary to distinguish Yin and Yang syndrome in treating hyperpyrexia after tracheotomy. However,it belongs to Yin syndrome,which could be treated by Mahuang Fuzi Xixin Decoction. Mahuang Fuzi Xixin Decoction is effective in the treatment of sick sinus syndrome,second degree atrioventricular block and third degree atrioventricular block. It can significantly alleviate symptoms,improve heart rate,and heart rhythm in a short period of time. However,after one year of drug withdrawal,the diseases may recur,indicating that Mahuang Fuzi Xixin Decoction may not improve the long-term prognosis of slow arrhythmia. Mahuang Fuzi Xixin Decoction is often used for fever or nosocomial infection in critical care medicine. In the treatment of critical care medicine complicated with high fever,Mahuang Fuzi Xixin Decoction is often taken continuously by stomach tube.

Exploration of Chaige Jieji Decoction formula syndromes based on severe cases of critical care and its application for acute exogenous fever and nosocomial infection / 中国中药杂志

Chaige Jieji Decoction recorded in Six Books of Exogenous Febrile Disease could be used to treat exterior syndrome due to wind-cold and heat caused by stagnation. The indications of Chaige Jieji Decoction include acute exogenous febrile diseases,such as influenza,upper respiratory tract infection,nosocomial infection; symptoms and signs,such as headache,eye pain,orbital pain,dizziness; fever,cold and hot exchanges; dry mouth,thirst,cold drinks,bitter mouth,dry throat; dry nose,stuffy nose,runny nose; poor appetite,silent appetite; strong neck,stiff back; insomnia,difficulty in sleeping; cough and sputum; abdominal pain,limb twitching;slightly torrent pulse. Disease involving all three Yang channels is very common in acute exogenous febrile diseases; the pathogenesis of exogenous diseases is quite different between cases in South China and North China. Most of the exogenous diseases in North China involves all three Yang channels. Disease involving all three Yang channels is the core of the pathogenesis of Chaige Jieji Decoction syndrome,in which headache is the key indications. Chaige Jieji Decoction can not only treat exogenous diseases,but also treat nosocomial infections in critically ill patients during hospitalization. Although Chaige Jieji Decoction,Xiaochaihu-Maxing Shigan Decoction,and Xiaochaihu-Daqinglong Decoction could be used to treat disease involving all three Yang channels,there are differences in indicators among them.

Restrictive measure for the commercialization of antimicrobials in Brazil: results achieved / Medida restritiva para comercialização de antimicrobianos no Brasil: resultados alcançados

ABSTRACT OBJECTIVE To assess whether the incidence of hospital infection by a resistant microorganism decreased after the implementation of the restrictive measure of the National Health Surveillance Agency for the commercialization of antimicrobials. METHODS A historical cohort study of medical records of adult patients admitted to a general and public hospital from May 2010 to July 2011. A cohort was formed with patients admitted in the period before the restrictive measure for the commercialization of antimicrobials (Phase I) and a second cohort was formed with patients admitted after the implementation of the restrictive measure (Phase II). RESULTS The instantaneous risk of hospital infection by a resistant microorganism was estimated at seven by 1,000 people-time (95%CI 0.006-0.008) in Phase I, and four by 1,000 people-time (95%CI 0.003-0.005) in Phase II of the study. The differences between the survival curves in the different phases of the study and stratified by age group were also significant (p < 0.05). CONCLUSIONS The results suggest that the implementation of the restrictive measure of the commercialization of antimicrobials by the National Health Surveillance Agency reduced the incidence of hospital infection by a resistant microorganism.

RESUMO OBJETIVO Avaliar se a incidência de infecção hospitalar por microrganismo resistente diminuiu após a implementação da medida restritiva da Agência Nacional de Vigilância Sanitária para comercialização de antimicrobianos. MÉTODOS Estudo de coorte histórica de registros de prontuários de pacientes adultos admitidos para internação em um hospital geral e público no período de maio de 2010 a julho de 2011. Foi formada uma coorte com pacientes internados em período anterior à medida restritiva para comercialização de antimicrobianos (Fase I) e uma segunda coorte com pacientes admitidos após a implantação da medida restritiva (Fase II). RESULTADOS O risco instantâneo de infecção hospitalar por microrganismo resistente foi estimado em sete por 1.000 pessoas-tempo (IC95% 0,006-0,008) na Fase I, e quatro por 1.000 pessoas-tempo (IC95% 0,003-0,005) na Fase II do estudo. As diferenças entre as curvas de sobrevida nas diferentes fases do estudo e estratificadas pela faixa etária também foram significativas (p < 0,05). CONCLUSÕES Os resultados sugerem que a implantação da medida restritiva de comercialização de antimicrobianos pela Agência Nacional de Vigilância Sanitária reduziu a incidência de infecção hospitalar por microrganismo resistente.

Inadequate use of antibiotics and increase in neonatal sepsis caused by resistant bacteria related to health care assistance: a systematic review

ABSTRACT Background Technologies and life support management have enhanced the survival of preterm infants. The immune system of newborns is immature, which contributes to the occurrence of healthcare-associated infections. The overlap of several conditions with neonatal sepsis and the difficulty of diagnosis and laboratory confirmation during this period result in a tendency to over-treat neonatal sepsis. The use of antimicrobial agents is a risk factor for multidrug-resistant bacterial infections. This work aimed to perform a systematic review of the relationship between inadequate use of antimicrobial agents and increase in neonatal sepsis related to healthcare assistance, due to bacterial resistance. Methods Our population, exposition, comparison, outcome and study type was as follows: P: hospitalized neonates with sepsis diagnosis, E: inappropriate use of antimicrobial agents, C: adequate use of antimicrobial agents or no indication of infection, O: resistant bacterial infection, and S: original studies. We performed searches in the PubMed, Scopus, Virtual Health Library (Scielo, LILACS, and MEDLINE), and Embase without limits on time, language, and the references of the articles found. Fourteen studies were included and assessed using the Grading of Recommendations, Assessment, Development, and Evaluation, Newcastle, and the Strengthening the Reporting of Observacional Studies in Epidemiology methodologies. Results All studies found were observational and started with a low-quality evidence level in the Grading of Recommendations, Assessment, Development, and Evaluation. Conclusions Despite their low-quality evidence, the studies demonstrated the association between inadequate use of antimicrobial agents and increase of neonatal resistant bacterial healthcare-associated infections in neonatal units. However, there is significant difficulty in conducting high-quality studies in this population due to ethical issues tied to randomized trials. Therefore, new studies should be encouraged to recommend adequate treatment of newborns without increasing the risk of healthcare-associated infections by multidrug-resistant bacteria.

Epidemiología, especies, resistencia antifúngica y evolución de las candidemias en un hospital universitario de Buenos Aires, Argentina, durante 16 años / Epidemiology, species, antifungal resistance and outcome of candidemia in a university hospital in Buenos Aires, Argentina for 16 years

Resumen Introducción: La epidemiologia de las candidemias varía en cada región. Objetivos: Conocer la epidemiología de las candidemias en un hospital durante 16 años. Material y Métodos: Se revisaron los episodios de candidemia ocurridos en el Hospital de Clínicas de Buenos Aires desde 01/01/98 al 31/12/13. Resultados: Se identificaron 374 episodios de candidemia. La incidencia fue de 2,21/1.000 egresos y aumentó de 1,96 (1998-2005) a 2,25 (2006-2013) (p = 0,023). Se diagnosticaron: 5,4% en neonatos, 1,7% en lactantes, 6,5% en niños mayores, 31,8% en adultos y 52,7% en adultos mayores de 64 años. Los episodios fueron causados por C. albicans (40,9%), C. parapsilosis (21,7%), C. tropicalis (15,5%), C. glabrata (13,9%), otras especies de Candida (5,1%) y candidemias multiespecies (2,9%). El 5,3% de los aislados fue resistente a fluconazol. Setenta y cuatro por ciento de los pacientes recibió tratamiento; 70,3% lo inició con fluconazol, 25% con anfotericina B desoxicolato y 4,7% con equinocandinas o anfotericinas lipídicas. Se retiró 81% de los catéteres venosos centrales. La mortalidad fue de 47,9%, pero fue de 60,8% para los adultos mayores. Conclusión: La incidencia de candidemias se incrementó a través de los años, fue mayor en los adultos mayores y esta población tuvo peor evolución.

Background: The epidemiology of candidemia vary by region. Aim: To determine the epidemiology of candidemia in a hospital for 16 years. Material and Methods: Episodes of candidemia occurred in the Hospital de Clinicas of Buenos Aires were reviewed, from 01/01/98 to 31/12/13. Results: 374 episodes of candidemia were identified. The incidence was 2.21/1,000 discharges and increased from 1.96 (1998-2005) to 2.25 (2006-2013) (p = 0.023). Candidemia was diagnosed: 5.4% in neonates, 1.7% in infants, 6.5% in children, 31.8% in adults and 52.7% in elderly adults over 64 years old. The episodes were caused by C. albicans (40.9%), C. parapsilosis (21.7%), C. tropicalis (15.5%), C. glabrata (13.9%), other species of Candida (5.1%) and more than one species of Candida (2.9%). The 5.3% of the isolates were resistant to fluconazole. 74% of patients were treated. Initial treatments were with fluconazole (70.3%), amphotericin B deoxycholate (25%), echinocandins or lipidic amphotericin (4,7%). The 81% of central venous catheters were taken off. Mortality rate was of 47.9%, but in the elderly adults was of 60.8%. Conclusion: The incidence of candidemia showed an increase over the years. It was higher in the elderly adults, being the group with worse outcomes.

Epidemiología y susceptibilidad antifúngica de especies causantes de candidemia en la ciudad de Valdivia, Chile / Epidemiology and antifungal susceptibility of species producing candidemia in Valdivia, Chile

Resumen Introducción: La epidemiología de la candidemia en Chile es poco conocida, a pesar de ser una enfermedad frecuente y grave. Objetivos: Analizar la incidencia y perfil de susceptibilidad in vitro de especies del género Candida causantes de candidemia en el Hospital Base Valdivia. Material y Métodos: Se identificó todos los casos de candidemia ocurridos en la institución entre marzo de 2009 y agosto de 2011. Se estudió la distribución de especies y susceptibilidad in vitro por el método de disco difusión. Resultados: Se estudiaron 27 episodios de candidemia. La incidencia varió de 0,3 a 0,7 por 1.000 egresos (según servicio clínico). Fueron factores de riesgo: la hospitalización, uso previo de antimicrobianos, edad avanzada y enfermedad de base (insuficiencia renal, enfermedad cardiaca y pulmonar). La especie más frecuente fue C. albicans seguida de C. tropicalis, C. glabrata y C. krusei. Voriconazol fue el antifúngico con mejor actividad in vitro y hubo resultados variables para anfotericina B, fluconazol e itraconazol. Discusión: La incidencia encontrada fue superior a la de países desarrollados. Candida albicans, constituye la especie más frecuente, con alta sensibilidad in vitro a fluconazol, debiendo ser vigiladas las especies de Candida no albicans. Es fundamental desarrollar nuevas investigaciones para detectar potenciales variaciones epidemiológicas.

Background: Candidemia disease in Chile is not very known, despite being a very common and serious disease. Aim: To analyze incidence and susceptibility profile of species from the genus Candida in Hospital Base Valdivia. Material and Methods: All candidemia cases presented between March 2009 and August 2011 in our institution were identified. Species distribution and susceptibility were studied through the disk diffusion method. Results: Twenty-seven candidemia episodes were studied. Incidence varied from 0.3 to 0.7 by a thousand discharges (according to clinical service). Risk factors were hospitalization, preliminary use of antibiotics, aged people and underlying disease (renal failure, heart and lung disease). The most frequent species was C. albicans, followed by C. tropicalis, C. glabrata and C. krusei. Voriconazole was the antifungal showing the best in vitro performance. Amphotericin B, fluconazole and itraconazole presented variable results. Discussion: Incidence found was superior to that described in developed countries. Candida albicans constitute the most frequent species, with high sensitivity levels to fluconazole; Candida no albicans species must be monitored. Developing new research on the topic appears as fundamental to detect potential epidemiological variations.

Bacterias nosocomiales emergentes: Infección endovascular por Elizabethkingia meningoseptica / Emerging nosocomial bacteria: Endovascular infection by Elizabethkingia meningoseptica

Elizabethkingia meningoseptica es un bacilo gram negativo no fermentador, no móvil, y oxidasa positivo, ampliamente distribuido en la naturaleza pero poco frecuente en humanos, en quienes se considera un patógeno oportunista, actualmente denominado emergente. En el ambiente hospitalario se ha encontrado en superficies húmedas y en equipos médicos, soluciones que habitualmente se utilizan de forma intravenosa, y en medicamentos de reconstitución. Puede causar infección en personas inmunocomprometidas o con enfermedades debilitantes concomitantes. Además, posee enzimas de resistencia frente a los antibióticos prescritos usualmente contra las bacterias gram negativas. Se presenta un caso de bacteriemia por E. meningoseptica en un paciente con antecedente de enfermedad renal crónica, quien recibía tratamiento hemodíalítico 3 veces por semana, desde hace 2 años, al ingreso se documentó infección del sitio de inserción del catéter venoso central, y posteriormente se aisló en los hemocultivos periféricos el crecimiento de la bacteria E. meningoseptica, el paciente cumplió tratamiento con trimetroprim-sulfametoxazol por 14 días con adecuada evolución clínica, sin complicaciones...(AU)

Elizabethkingia meningoseptica is a non fermenter bacilli gram negative, non-mobile, and positive oxidase, widely distributed in nature but rare in humans, in whom it is considered an opportunistic pathogen, now called emerging. In the hospital environment it was found on wet surfaces and medical equipment, solutions usually used intravenously, and drug reconstitution. It can cause infection in immunocompromised or with concomitant debilitating diseases people. It also has resistance to enzymes usually prescribed antibiotics against gram negative bacteria. A case of bacteremia is presented by E. meningoseptica in a patient with a history of chronic kidney disease, who received hemodialysis 3 times a week, for 2 years, entry site infection insertion of central venous catheter was documented and later was isolated from peripheral blood cultures the growth of bacteria E. meningoseptica, the patient completed treatment with trimethoprim-sulfamethoxazole for 14 days with adequate clinical course without complications...(AU)

Estudio de las infecciones por Staphylococcus aureus en un hospital general de agudos (2002-2013) / Study of Staphylococcus aureus infections in a general acute care hospital (2002-2013)

Se realizó una revisión retrospectiva durante 12 años de las infecciones por Staphylococcus aureus en pacientes adultos (PA) y pediátricos (PP) asistidos en el Hospital Interzonal General de Agudos Evita de Lanús, para conocer la incidencia, los focos y el origen de la infección, y analizar el perfil de resistencia antimicrobiana. Se documentaron 2125 casos de infección en PA y 361 en PP. La incidencia de casos en PA descendió significativamente en el último trienio (χ²; p < 0,05); en los PP aumentó significativamente durante los últimos 5 años (χ²; p < 0,0001). En ambas poblaciones se detectó un aumento significativo en las infecciones de piel y estructuras asociadas (PEA), de bacteriemias a punto de partida de un foco en PEA y de infecciones por S. aureus de inicio en el hospital (χ²; p < 0,005). La meticilino-resistencia (SAMR) aumentó del 28 al 78% en PP; en PA se mantuvo alrededor del 50%, con reducción significativa de la resistencia acompañante a antimicrobianos no betalactámicos en los SAMR de ambas poblaciones. En S. aureus documentados de infecciones de inicio en la comunidad (SAMR-CO) del último trienio, el porcentaje de meticilino-resistencia resultó del 57% en PP y 37% en PA; en infecciones con inicio en el hospital fue del 43 y el 63%, respectivamente. Si bien demostramos que S. aureus continúa siendo un patógeno asociado al ámbito nosocomial, hubo un aumento de infecciones por SAMR-CO, con compromiso en PEA en ambas poblaciones.

A twelve-year retrospective review of Staphylococcus aureus infections in adult and pediatric patients (AP and PP respectively) assisted in the Hospital Interzonal General de Agudos Evita in Lanús was performed to determine the incidence, foci of infection, the source of infection and to analyze the profile of antimicrobial resistance. An amount of 2125 cases of infection in AP and 361 in PP were documented. The incidence in AP decreased significantly in the last three years (χi²; p < 0.05); in PP it increased significantly during the last five years (χ²; p < 0.0001). In both populations was detected a notable increase in skin infections and associated structures (PEA) in bacteremia to the starting point of a focus on PEA, and in total S. aureus infections of hospital-onset (χ²; p < 0.005). Methicillin-resistance (MRSA) increased from 28 to 78% in PP; in AP it remained around 50%, with significant reduction in accompanying antimicrobial resistance to non-β-lactams in both groups of MRSA. In S. aureus documented from community onset infections (CO-MRSA) in the last three years, the percentage of methicillin-resistance was 57% in PP and 37% in AP; in hospital-onset infections it was 43% and 63% respectively. Although data showed that S. aureus remains a pathogen associated with the hospital-onset, there was an increase of CO-MRSA infections with predominance in PEA in both populations.

Antimicrobial Resistance and Clinical Outcomes in Nursing Home-Acquired Pneumonia, Compared to Community-Acquired Pneumonia

PURPOSE: Patients with nursing home-acquired pneumonia (NHAP) should be treated as hospital-acquired pneumonia (HAP) according to guidelines published in 2005. However, controversy still exists on whether the high mortality of NHAP results from multidrug resistant pathogens or underlying disease. We aimed to outline differences and factors contributing to mortality between NHAP and community-acquired pneumonia (CAP) patients. MATERIALS AND METHODS: We retrospectively evaluated patients aged 65 years or older with either CAP or NHAP from 2008 to 2014. Patients with healthcare-associated pneumonia other than NHAP or HAP were excluded. RESULTS: Among 317 patients, 212 patients had CAP and 105 had NHAP. Patients with NHAP had higher mortality, more frequently used a ventilator, and had disease of higher severity than CAP. The incidences of aspiration, tube feeding, and poor functional status were higher in NHAP. Twenty three out of 54 NHAP patients and three out of 62 CAP patients had multidrug resistant pathogens (p<0.001). Eleven patients with NHAP died at discharge, compared to 7 patients with CAP (p=0.009). However, there was no association between mortality rate and presence of multidrug-resistant pathogens. The number of involved lobes on chest X-ray [odds ratio (OR)=1.708; 95% confidence interval (CI), 1.120 to 2.605] and use of mechanical ventilation (OR=9.537; 95% CI, 1.635 to 55.632) were significantly associated with in-hospital mortality. CONCLUSION: Patients with NHAP had higher mortality than patients with CAP. The excess mortality among patients with NHAP and CAP was related to disease severity but not to the presence of multidrug resistant pathogens.