Application and reflection of laboratory-based monitoring in early warning of infectious diseases / 中华预防医学杂志

Despite the fact that our cognition towards infectious disease prevention, the advanced technology and the economic status of the whole society has made a great progress in the last decade, the outbreak of COVID-19 pneumonia has again enabled the public to acquire more about super-challenges of infectious diseases, epidemics and the relevant preventive measurements. In order to identify the epidemic signals in early stage or even before the onset of epidemic, the data research and utilization of a series of factors related to the occurrence and transmission of infectious diseases have played a significant role in research of prevention and control during the whole period of surveillance and early warning. Laboratory-based monitoring for the etiology has always been an important part of infectious disease warning system due to pathogens as the direct cause of such diseases. China has initially established a laboratory-based monitoring and early warning system for bacterial infectious diseases based on the Chinese Pathogen Identification Network with an aim to identify pathogens, outbreaks and sources. This network has played an essential role in early detection, tracking and precise prevention and control of bacterial infectious diseases, such as plague, cholera, and epidemic cerebrospinal meningitis. This issue focuses on the function of laboratory-based monitoring during the period of early warning, prevention, and control of bacterial infectious diseases, and conducted a wide range of researches based on the analysis of the epidemic and outbreak isolates, together with field epidemiological studies and normal monitoring systems. All of these could illustrate the effect of laboratory surveillance in the infectious disease risk assessment and epidemic investigation. At the same time, we have put forward our review and expectation of scenarios about laboratory-based monitoring and early warning technologies to provide innovative thoughts for promoting a leapfrog development of infectious disease monitoring and early warning system in China.

Resistencia antimicrobiana. Importancia y esfuerzos por contenerla / Antimicrobial resistance. Its importance and efforts to control it

Resumen La Organización Mundial de la Salud estima que en 2050 la resistencia bacteriana ocasionará 10 millones de muertes. Como parte del Plan de Acción Mundial sobre la Resistencia a los Antimicrobianos propuso redes de laboratorios especializados, para conservar cepas y optimizar el uso de los antimicrobianos. En un estudio de 2019 se identificó que las principales bacterias del grupo ESKAPE (con alta resistencia a los antibióticos más usados) que causan infecciones en hospitales de México son Klebsiella spp. resistentes a múltiples fármacos (MDR) y productoras de betalactamasa de espectro extendido (BLEE), Enterobacter spp. BLEE, Acinetobacter baumannii, Pseudomonas aeruginosa MDR, Staphylococcus aureus meticilinorresistente y Enterococcus faecium resistente a vancomicina. Con la información de resistencia a los fármacos se recomiendan esquemas para tratar la infección causada por Helicobacter pylori, relacionado con el desarrollo de cáncer y cuya prevalencia en la población adulta de Latinoamérica se estima es de entre 60 y 70 %.

Abstract The World Health Organization estimates that bacterial resistance will cause 10 million deaths by 2050. As part of the Global Action Plan on Antimicrobial Resistance, it proposed networks of specialized laboratories in order to preserve strains and optimize the use of antimicrobials. In a 2019 study, the main bacteria of the ESKAPE group (which are highly-resistant to the most widely used antibiotics) that cause infections in Mexican hospitals were identified to be multidrug-resistant (MDR) and extended spectrum beta-lactamase (ESBL)-producing Klebsiella spp., ESBL-producing Enterobacter spp., Acinetobacter baumannii, MDR Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecium. With information on drug resistance, regimens are recommended to treat infection caused by Helicobacter pylori, a pathogen related to the development of cancer and whose prevalence in the adult population of Latin America is estimated to range between 60 and 70%.

Utilidad de los parámetros clínicos y de laboratorio básicos para predecir infección bacteriana seria en menores de 3 meses que se hospitalizan por síndrome febril sin foco / Utility of basic clinical and laboratory parameters to predict Serious Bacterial Infection in children younger than 3 months old hospitalized for Febrile Syndrome without Source

Resumen: Introducción: Un 20% de los niños con síndrome febril se presenta como síndrome febril sin foco (SFSF). Las es trategias de manejo en este grupo presentan alta sensibilidad, pero baja especificidad. Objetivos: Ca racterizar las infecciones bacterianas serias (IBS) en menores de 3 meses hospitalizados por SFSF, y evaluar utilidad de parámetros clínicos y de laboratorio en la identificación de pacientes con alto riesgo de IBS. Pacientes y Método: Estudio prospectivo en pacientes < 3 meses hospitalizados entre enero 2014 y noviembre 2015 por SFSF en dos hospitales pediátricos de la Región Metropolitana. Criterios de inclusión: edad 4 días - 3 meses, fiebre > 38°C de < 72 h de evolución sin causa demostra ble. Criterios de exclusión: uso de antimicrobianos hasta 7 días previo a su ingreso, prematuros < 34 semanas, peso de nacimiento < 2 kg e inmunocomprometidos. Se registraron datos demográficos, clínicos, y exámenes de laboratorio, hemograma y PCR, diagnóstico de egreso, IBS descartada, IBS probable o confirmada. Resultados: 32% de los pacientes egresó con diagnóstico de IBS, 28% con diagnóstico de infección viral o probablemente viral, 34% con diagnóstico de SFSF no especificado y 6% SFSF por otras causas. No se encontraron diferencias significativas en PCR, leucocitosis, aspecto tóxico ni horas de fiebre al ingreso al comparar los grupos con y sin IBS (p > 0,05). La combinación de parámetros clínicos y de laboratorio mostro sensibilidad de 27%, especificidad de 90%, VPP 60% y VPN 71%. Conclusión: No fue posible establecer que parámetros clínicos y de laboratorio permitan identificar menores de 3 meses con alto riesgo de IBS, manteniendo su utilidad como indicadores de bajo riesgo. Es necesario contar con otros elementos clínicos y de laboratorio que permitan discrimi nar IBS de infecciones virales.

Abstract: Introduction: In 20% of children with febrile syndrome, it appears as fever of unknown origin (FUO) syndrome. Management strategies in this group have high sensitivity but low specificity. Objectives: To cha racterize serious bacterial infections (SBI) in children younger than three months old hospitalized because of FUO syndrome and to evaluate the utility of clinical and laboratory parameters in the identification of patients that are at high risk of SBI. Patients and Method: Prospective study in patients aged < 3 months hospitalized due to FUO syndrome between January 2014 and November 2015 in two pediatric hospitals in the Metropolitan Region. Inclusion criteria: age 4 days - 3 months, fever > 38°C longer than 72 hours after onset without demonstrable cause. Exclusion criteria: anti microbial use up to 7 days before admission, preterm infants < 34 weeks, birth weight < 2 kg, and im munocompromised. Demographic, clinical, and laboratory tests data were recorded as well as blood count and CRP, discharge diagnosis, and ruled out, probable or confirmed SBI. Results: 32% of the patients were discharged with diagnosis of SBI, 28% with diagnosis of viral or probably viral infec tion, 34% with diagnosis of not specified FUO syndrome, and 6% due to other causes. There were no significant differences in the CRP value, altered WBCs count, toxic aspect, or hours of fever at the admission when comparing groups with and without SBI (p < 0.05). The combination of clinical and laboratory parameters showed 27% of sensitivity, 90% of specificity, 60% of PPV, and 71% of NPV. Conclusion: It was not possible to establish clinical and laboratory parameters that allow the identifi cation of children younger than 3 months old at high risk of SBI, however, they maintain their value as low risk indicators. It is necessary further investigation of other clinical and laboratory elements that allow discriminating SBI from viral infections.

Infectious complications as a predictor of mortality in patients with Non-Hodgkin lymphoma receiving rituximab- containing chemotherapy

Abstract Background Rituximab is a monoclonal antibody that increases the disease-free and overall survival of patients with non-Hodgkin lymphoma (NHL) CD20+. The objective of this study is to describe the prevalence and spectrum of infections in patients with NHL receiving rituximab-containing chemotherapy and the impact on survival. Materials and Methods From January 2011 to December 2012, all patients diagnosed with NHL who received at least one dose of rituximab were included. Results During the study period, 265 patients received rituximab; 108 (40.8%) males; the mean age was 60 ± 15 years. There were 177 infections in 85 patients, being the most common febrile neutropenia (n = 38; 21.5%) and mucosal barrier injury-related infections (n = 28; 15.8%). In 88 events (49%), there was a microbiologic diagnosis, being bacterial infection the most frequent (39.6%), but tuberculosis (TB) was developed in 4 cases (1.5%; incidence rate 721/100,000 person-year). During follow-up, 71 patients died (27%); in 35 cases, it was related to infection. There were no differences in follow-up between those who died due to infection versus those who died from another cause (p = 0.188). Multivariate analysis for mortality showed that age >60 years, failure to achieve a complete response, and development of an infectious complication increased the risk of death. Conclusions It is important to perform a screening test for TB in all patients who will receive rituximab and maintain a constant monitoring to detect an infectious process and begin treatment as soon as possible.

Prise en charge des infections materno-fœtales bactériennes dans le service de néonatologie de l'Hôpital Mère Enfant de N'Djamena au Tchad

Introduction : les décès des nouveau-nés demeurent encore un problème majeur de santé en Afrique malgré les ressources déployées. Le diagnostic des infections bactériennes materno-fœtales semble être souvent fait en excès avec un usage abusif des antibiotiques. L'objectif de l'étude était d'analyser les critères de diagnostic des infections materno-fœtales bactériennes et d'apprécier l'usage abusif des antibiotiques. Patients et méthodes : il s'agissait d'une enquête descriptive réalisée dans le service de Néonatologie de l'hôpital de la Mère et de l'Enfant de Ndjamena et basée sur l'étude des dossiers de tous les nouveau-nés hospitalisés au cours de la période du 1er Janvier au 30 Avril 2019 avec un âge inférieur à 72 heures de vie à l'admission, diagnostiqués pour une infection materno-fœtale et ayant reçu une antibiothérapie pendant au moins 48 heures. L'antibiothérapie a été considérée comme abusive si elle n'avait pas été arrêtée à la 48ème heure, en l'absence de tout argument biologique en faveur d'une infection materno-fœtale bactérienne. Résultats : Sur 404 nouveau-nés hospitalisés au cours de la période d'étude, 170 étaient retenus pour infection maternofœtale soit une fréquence de 42%. En se basant sur les critères rigoureusement définis d'infection néonatale certaine, d'infection néonatale probable ou pas d'infection néonatale, la fréquence était de 16,3% avec 1 cas d'infection certaine et 65 cas d'infection probable. Les nouveau-nés prématurés représentaient 24,2% du lot. Les détresses respiratoires et les signes neurologiques étaient les principales manifestations cliniques à l'admission. Tous les nouveau-nés avaient reçu comme antibiotiques Céfotaxime et Gentamycine. L'évolution s'était faite vers le décès dans 19,7% des cas et chez 62,5% des nouveau-nés prématurés. Le point de l'antibiothérapie à 48 heures d'hospitalisation a été faite chez 15,3% des nouveau-nés. L'usage des antibiotiques n'était pas justifié et était considéré comme abusif chez les 104 nouveau-nés ne présentant pas une infection soit 25% des admissions du service. Conclusion : La fréquence des infections materno-fœtales était surestimée à 42% dans le service de néonatologie de Ndjamena avec un taux d'usage abusif des antibiotiques de 25%. Cela amène à suggérer le renforcement des capacités sur la prévention des infections en maternité et une meilleure application des recommandations de l'Agence nationale d'accréditation et d'évaluation en santé

Análise dos surtos de origem alimentar notificados no Brasil no período de 2015 a 2017

Perigos químicos, físicos ou microbiológicos podem contaminar os alimentos e causar doenças de origem alimentar. Neste estudo foram analisados os surtos de doenças transmitidas por alimentos notificados no Brasil entre 2015 e 2017. Os resultados indicam que neste período foram notificados 1.758 surtos. O maior número de surtos ocorreu na região sudeste 37,1 %. Os locais de ocorrência dos surtos aconteceram em maior número nas residências (34,3%), restaurantes, padarias e similares (17,1 %) e 16,7% dos locais de ocorrência não foram identificados. Os alimentos mistos foram os mais envolvidos (13,6%), seguidos pela água (8,4%), carnes vermelhas (3,3%), leites e derivados (3,1%) e frutas (1,2%), sendo que em 66% dos surtos, os alimentos responsáveis não foram identificados. Os surtos foram principalmente de origem bacteriana, seguido por vírus e protozoários. No presente estudo, o micro-organismo causador do maior número de surtos foi a Escherichia coli (8%), seguido da Salmonella sp. (4%) e Staphylococcus sp. (3,9%), vale salientar que o agente etiológico não identificado, obteve o maior percentual com 74%, porém tal fato se deve ao atraso ou à inexistência das coletas, tanto clínicas como bromatológicas. Diante da análise dos dados, conclui-se que a maioria dos surtos de origem alimentar notificados no período apresentou resultados inconclusivos em relação aos micro-organismos e alimentos causadores destes, salientando, portanto que os órgãos fiscalizadores devem se preocupar em criar estratégias que possibilitem diminuir essas incidências inconclusas que interferem negativamente na possibilidade da criação de intervenções para minimizar a ocorrências destes tipos de surtos.

Chemical, physical or microbiological hazards can contaminate food and cause food-borne diseases. In this study we analyzed the foodborne disease outbreaks reported in Brazil between 2015 and 2017. The results indicate that in this period 1,758 were reported outbreaks. The largest number of outbreaks occurred in the southeastern region 37.1%. The locations of occurrence of outbreaks occurred in greater numbers in the residences (34.3%), restaurants, bakeries and similar (17.1 %) and 16. 7% of occurrence sites have not been identified. The mixed foods were the most involved (13.6%), followed by water (8.4%), red meat (3.3%), milk and dairy products (3.1%) and fruits (1.2%), and in 66% of the outbreaks, the food responsible have not been identified. The outbreaks were primarily of bacterial origin, followed by viruses and protozoa. In the present study, the microorganism which caused the largest number of outbreaks was Escherichia coli (8%), followed by Salmonella sp. (4%) and Staphylococcus sp. (3.9%), it's worth pointing out that the Etiologic Agent not identified, obtained the highest percentage with 74%, however such fact is due to the delay or the absence of the collections, both clinics as qualitative characteristics. On the analysis of the data, it is concluded that the majority of food-borne outbreaks reported inconclusive results regarding the microorganisms and foods that cause these, stressing, so that regulatory agencies should be bothering to create strategies to decrease these incidents that interfere negatively inconclusive negotiations on the possibility of creating interventions to minimize the occurrences of these types of outbreaks.

Estudo epidemiológico de pacientes portadores de infecção do complexo bucomaxilofacial tratados no Hospital Universitário de Maringá: estudo retrospectivo ao longo de 8 anos / Epidemiological study of patients with oral maxillofacial infection treated at Universitary Hospital of Maringá: retrospective study about 8 years

Infecções agudas bucomaxilofaciais podem ser condições clínicas graves e de ocorrência comum, caracterizadas pela disseminação do processo infeccioso a tecidos adjacentes e espaços faciais da região de cabeça e pescoço, podendo resultar em várias complicações, até mesmo em óbito, embora seja raro. Objetivo: realizar uma análise epidemiológica de infecções maxilofaciais, relacionando os dados ao tratamento instituído e à sua efetividade, bem como analisar dados referentes a idade, sexo, principais dentes envolvidos e tempo total de internação. Sujeito e método: foram analisados retrospectivamente 240 prontuários de pacientes admitidos no Hospital Universitário de Maringá com infecção odontogênica, atendidos pela equipe de Cirurgia e Traumatologia Bucomaxilofacial no período de janeiro de 2009 a janeiro de 2017. Resultados: a média de idade dos pacientes foi de 38 anos, com 57 mulheres e 54 homens. A média de temperatura de admissão foi 38,5°C. A região mais acometida foi o ramo posterior da mandíbula, tendo uma média de duração de infecção e hospitalização de 6,1 dias. A principal conduta foi drenagem e antibioticoterapia, sendo que cerca de 13 pacientes não precisaram desse tipo de intervenção, e um paciente evoluiu a óbito. Conclusão: com base nestes resultados e na literatura, infecções odontogênicas merecem atenção, pois podem ser fatais e requerem internação rápida e tratamento adequado. Esse, portanto, é um assunto de grande importância para o cirurgião- -dentista, que exerce papel fundamental na prevenção e no tratamento. A resolução precoce ainda é a forma mais adequada para evitar complicações mais graves. (AU)

Acute Oral maxillofacial infections can be serious and relatively common clinical conditions, characterized by the spread of the infectious process to adjacent tissues and facial spaces of the head and neck region, which can result in several complications and lead to even death, although it is rare. Objective: the objective of this study was to perform an epidemiological analysis of maxillofacial infections and relate their data to the treatment instituted and the effectiveness of the same, as well as to analyze data regarding the age, sex, main teeth involved and total time of hospitalization. Subjects and method: in order to carry out study, 240 medical recordswere analyzed retrospectivelyat the University Hospital of Maringá of the patients with odontogenic infection attended by the Oral Maxillofacial Surgeon in the period of January 2009 to January 2017. Results: as a result, mean age was 38 years, with 57 women and 54 men and mean intake temperature was 38.5 °. The most affected region was the posterior branch of the mandible, with a mean duration of infection and hospitalization of 6.1 days. The main conduct was drainage and antibiotic therapy, and about 13 patients did not need this intervention and only 1 died. Conclusion: Based on these results and in literature, attention should be paid to odontogenic infections, which can be fatal and require proper treatment. This is a subject of great importance for the dentist, who plays a key role in prevention and proper treatment, its early resolution is still the most appropriate way to avoid serious complications. (AU)

Delayed healthcare and secondary infections following freshwater stingray injuries: risk factors for a poorly understood health issue in the Amazon

Abstract INTRODUCTION This study aimed to describe the profile of freshwater stingray injuries in the State of Amazonas, Brazilian Amazon, and to identify the associated risk factors for secondary infections. METHODS This cross-sectional study used surveillance data from 2007 to 2014 to identify factors associated with secondary infections from stingray injuries. RESULTS A total of 476 freshwater stingray injuries were recorded, with an incidence rate of 1.7 cases/100,000 person/year. The majority of injuries were reported from rural areas (73.8%) and 26.1% were related to work activities. A total of 74.5% of patients received medical assistance within the first 3 hours of injury. Secondary infections and necrosis were observed in 8.9% and 3.8%, respectively. Work-related injuries [odds ratio (OR) 4.1, confidence interval (CI); 1.87-9.13] and >24 hours from a sting until receiving medical care (OR; 15.5, CI; 6.77-35.40) were independently associated with the risk of secondary bacterial infection. CONCLUSIONS: In this study, work-related injuries and >24 hours from being stung until receiving medical care were independently and significantly associated with the risk of secondary infection. The frequency of infection following sting injuries was 9%. The major factor associated with the risk of secondary bacterial infection was a time period of >24 hours from being stung until receiving medical care.

Infecciones en niños quemados internados en el Centro Nacional de Quemados y Cirugías Reconstructivas (CENQUER) Paraguay de Enero 2017 a Enero 2018 / Infections in burned children admitted to the National Center for Burns and Reconstructive Surgery (CENQUER) Paraguay from January 2017 to January 2018

Introducción: Las infecciones juegan un rol importante en la morbilidad y mortalidad asociada a quemaduras. La experiencia en pacientes pediátricos es escasa. Objetivo: Evaluar aspectos clínicos y microbiológicos de infección intrahospitalaria en niños quemados en el Centro Nacional de Quemados y Cirugías Reconstructivas. Material y Métodos: Estudio descriptivo, observacional, retrospectivo y de corte transversal. Se incluyeron todos los niños quemados admitidos en el Servicio de Pediatría del Centro Nacional de Quemados y Cirugías Reconstructivas (CENQUER) desde enero del 2017 hasta enero del 2018. Resultados: El total de pacientes fue de 220, de los cuales fueron 161 (73%) lactantes, 24 (11%) pre escolares, 17 (8%) escolares, 13 (6%) adolescentes y 5 (2%) recién nacidos. El porcentaje de superficie corporal quemada tuvo un rango de 1 a 95% (mediana 27%). El tipo de quemadura fue A (superficial) en 78 (36%) pacientes, AB (intermedia) en 38 (17%) y B (profunda) en 104 (47%). Ciento ochenta niños (82%) tuvieron catéter venoso, 166 (75,5%) catéter arterial y 172 (78%), sonda vesical. En 150 pacientes (68%) se requirió asistencia respiratoria mecánica. Se documentaron 128 (58%) infecciones. El foco más frecuente fue la sepsis relacionada con la quemadura. Las bacterias Gram (-) Pseudomonas aeruginosa y Acinetobacter spp multirresistentes, fueron los gérmenes más frecuentemente aislados. Se fueron de alta 186(85%) pacientes y 34 (15%) fallecieron. En 28 (82%) de ellos, la causa del fallecimiento estuvo relacionada con la infección. La duración de la internación tuvo una mediana de 37 días. Conclusiones: Las infecciones en niños quemados son una importante causa de morbimortalidad y las bacterias Gram (-) multirresistentes juegan un importante rol en las mismas. La mortalidad estuvo relacionada a la infección

Introduction: Infections play an important role in the morbidity and mortality associated with burns. Experience in pediatric patients is scarce. Objective: To evaluate clinical and microbiological aspects of nosocomial infection in children burned in the National Center for Burns and Reconstructive Surgeries. Material and Methods: A descriptive, observational, retrospective and cross-sectional study. All burned children admitted to the Pediatric Service of the National Center for Burns and Reconstructive Surgery (CENQUER) from January 2017 to January 2018 were included. Results: The total number of patients was 220, of which 161 (73%) were breastfeeding, 24 (11%) pre-school, 17 (8%) schoolchildren, 13 (6%) adolescents and 5 (2%) newborns. The percentage of burned body surface area ranged from 1 to 95% (median 27%). The type of burn was A (superficial) in 78 (36%), patients, AB (intermediate) in 38 (17%) and B (deep) in 104 (47%). One hundred and eighty children (82%) had venous catheter, 166 (75.5%) arterial catheter and 172 (78%); bladder catheter in 150 patients (68%) mechanical ventilation was required. In 128(58%) patients infections were documented. The most frequent focus was sepsis related to the burn. Gramnegative bacteria Pseudomonas aeruginosa and multiresistant Acinetobacter spp were the most frequently isolated germs. 186(85%) patients were discharged and 34 (15%) died. In 28 (82%) of them, the cause of death was related to the infection. The duration of the hospitalization had a median of 37 days. Conclusions: Infections in burned children are an important cause of morbidity and mortality and multidrug resistant gram negative bacteria play an important role in them. Mortality was related to infection.

Epidemiology of diabetic foot infections in a reference tertiary hospital in India

Abstract Introduction The present study attempts to examine the microbial profile and antibiotic susceptibility of diabetic foot infections in the intensive care unit of a tertiary referral centre for diabetic foot. As part of the study, we also attempted to find the prevalence of blaNDM-like gene among carbapenem-resistant gram negative infections. Methodology A prospective study of 261 patients with diabetic foot infections was performed during the period between January 2014 and June 2014. Results A total of 289 isolates were obtained from 178 tissue samples from 261 patients, 156 (59.7%) males and 105 (40.2%) females, with a mean age of 58 years (-15 years), having diabetic foot infection. No growth was seen in thirty eight (17.6%) tissue samples. Out of the total samples, 44.3% were monomicrobial and 55.7% were polymicrobial. Gram negative pathogens were predominant (58.5%). Seven of the total isolates were fungal; 0.7% showed pure fungal growth and 1.7% were mixed, grown along with some bacteria. The most frequently isolated bacteria were Staphylococcus aureus (26.9%), followed by Pseudomonas aeruginosa (20.9%). Of the 58.5% gram negative pathogens, 16.5% were Enterobacteriaceae resistant to carbapenems. Among these isolates, 4 (25%) were positive for blaNDM-like gene. Among the rest, 18.6% were carbapenem-resistant Pseudomonas, among which 4 (36.3%) were blaNDM. Among the Staphylococci, 23.7% were methicillin-resistant Staphylococcus aureus. Conclusions Our results support the recent view that gram negative organisms, depending on the geographical location, may be predominant in DFIs. There is an increase in multidrug-resistant pathogens, especially carbapenem resistance and this is creeping rapidly. We need to be more judicious while using empiric antibiotics.

Infecciones asociadas a sistemas de derivación de líquido cefalorraquídeo en pediatría: análisis epidemiológico y de factores de riesgo de mortalidad / Cerebrospinal fluid shunt-associated infections in pediatrics: Analysis of the epidemiology and mortality risk factors

Introducción. La infección es de las complicaciones más frecuentes de los sistemas de derivación ventricular de líquido cefalorraquídeo. El objetivo fue describir las características clínicas, microbiológicas y evolutivas de niños con infección asociada a sistemas de derivación ventricular de líquido cefalorraquídeo y analizar los factores de riesgo, relacionados con la mortalidad. Población y métodos. Estudio descriptivo, retrospectivo, llevado a cabo en el Hospital "Prof. Dr. Juan P. Garrahan" de la Ciudad de Buenos Aires. Se evaluaron todos los pacientes internados desde el 1/1/2012 y el 31/12/2015 compatibles con ventriculitis y cultivo de líquido cefalorraquídeo positivo. Resultados. Se incluyeron 49 pacientes con 57 infecciones. La mediana de edad fue de 62 meses (rango intercuartílico: 19-114). Predominó el sexo masculino: 34 (70%). El tumor del sistema nervioso central fue la enfermedad de base más frecuente: 20 (40%). Se aisló estafilococo coagulasa negativo en 26 (46%), Staphylococcus aureus en 13 (23%), bacilos Gramnegativos en 11 (19%) y otros en 7 (12%). En 55 (97%) de las infecciones, se realizó tratamiento quirúrgico con retiro del sistema de derivación ventricular más antibioticoterapia. La mortalidad fue del 9%. Los únicos factores asociados a la mortalidad estadísticamente significativos fueron hemocultivos positivos (p= 0,04), fiebre al ingreso (p= 0,04) y shock séptico (p= 0,0006). Conclusiones. El estafilococo coagulasa negativo fue el germen más frecuente. El retiro de la válvula, junto con la antibioticoterapia, fue el tratamiento más utilizado. La presencia de fiebre al ingreso, hemocultivos positivos y shock séptico fueron predictores de mortalidad.

Introduction. Infections are the most common complications of ventricular cerebrospinal fluid shunts. The objective of this study was to describe the clinical, microbiological, and evolutionary characteristics of children with ventricular cerebrospinal fluid shunt-associated infections and analyze the risk factors for mortality. Population and methods. Descriptive, retrospective study carried out at Hospital "Prof. Dr. Juan P. Garrahan" in the Autonomous City of Buenos Aires. All patients hospitalized between January 1st, 2012 and December 31st, 2015 who were compatible with ventriculitis and had a positive cerebrospinal fluid culture were assessed. Results. A total of 49 patients with 57 infections were included. Their median age was 62 months (interquartile range: 19-114). Males predominated: 34 (70%). A central nervous system tumor was the most common underlying disease: 20 (40%). Coagulase-negative Staphylococcus was isolated in 26 (46%); Staphylococcus aureus, in 13 (23%); Gram-negative bacilli, in 11 (19%); and other microorganism, in 7 (12%). Treatment consisted of removal of ventricular shunt plus antibiotic therapy for 55 (97%) infections. The mortality rate was 9%. The only statistically significant factors associated with mortality were positive blood cultures (p= 0.04), fever at the time of admission (p= 0.04), and septic shock (p= 0.0006). Conclusions. Coagulase-negative Staphylococcus was the most common microorganism. Valve removal plus antibiotic therapy was the most frequently instituted treatment. Fever at the time of admission, positive blood cultures, and septic shock were predictors of mortality.

Caracterización clínica de la meningitis aguda de la comunidad causada por Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae y Listeria monocytogenes en adultos en el Hospital Carlos van Buren entre los años 2013 y 2016 / Clinical characteristics of community-acquired acute meningitis caused by Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae and Listeria monocytogenes in adults in Carlos van Buren Hospital between 2013-2016

INTRODUCCIÓN: la meningitis bacteriana es una enfermedad infecciosa aguda grave, que por su letalidad y costos en atención de salud genera un alto impacto en Salud Pública. Los agentes causales más frecuentes son Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae y Listeria monocytogenes, pero poco conocemos de nuestra realidad local. MATERIALES Y MÉTODOS: estudio descriptivo, con revisión de base de datos del laboratorio de microbiología del Hospital Carlos Van Buren, obteniendo datos de los cultivos de líquido céfalo raquídeo de pacientes mayores de 15 años entre marzo de 2013 y noviembre de 2016. RESULTADOS: 128 casos de meningitis bacteriana aguda, de los cuales 17 fueron por los microorganismos objetivos del estudio, siendo el más frecuente S. pneumoniae, clínicamente un 58% se presentó sin signos meníngeos. A 30 días del diagnóstico un 35% había fallecido, la mitad de ellos inició el tratamiento antibiótico pasadas las 24 horas desde su ingreso al hospital. En el 46% la tinción gram no evidenció bacterias. DISCUSIÓN: los microorganismos clásicamente descritos como agentes causales parecen no explicar la totalidad de los cuadros de meningitis bacteriana aguda en la población adulta estudiada, la ausencia de signos meníngeos no permite descartar la sospecha diagnóstica. La mitad de los pacientes fallecidos inició el tratamiento antibiótico pasadas las primeras 24 horas.

INTRODUCTION: bacterial meningitis is a serious acute infectious disease whose lethality and elevated health costs have a serious impact on public health. The most frequent causes are Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenza and Listeria monocytogenes, but we know little of the local situation. MATERIALS AND METHODS: A descriptive study reviewing Carlos van Buren Hospital´s microbiology laboratory data base, and obtaining the details of cerebrospinal fluid cultures of patients over the age of 15 between March 2013 and November 2016. RESULTS: 128 cases of acute bacterial meningitis of which 17% were caused by the micro-organisms of study, the most frequent being Streptococcus pneumoniae. 58% of patients had no meningeal signs. At 30 days from diagnosis 35% had died, half of these having started antibiotic treatment over 24 hours after admission. 46% of the Gram stains showed no bacteria. DISCUSSION: the classical infectious agents do not appear to account for the totality of acute bacterial meningitis in the population studied. The absence of meningeal signs should not rule out the diagnosis. Half of the patients who died started antibiotic treatment after the first 24 hours.

Epidemiología de la patología quirúrgica que afecta al territorio maxilofacial, tratada bajo anestesia general en el Hospital de Urgencia Asistencia Pública entre 2014 y 2016 / Epidemiology of surgical pathology affecting the maxillofacial area, treated under general anesthesia at the Emergency Hospital Public Assistance between 2014 and 2016

Objetivo: Presentar la experiencia de la especialidad en cirugía y traumatología bucal y maxilofacial en el Hospital de Urgencia Asistencia Pública, a través de la epidemiología de los tratamientos quirúrgicos realizados en pabellón central, bajo anestesia general, durante el período comprendido entre noviembre del 2014 y julio del 2016. Material y métodos: Se realizó un estudio retrospectivo en el que se analizaron los protocolos operatorios de los pacientes intervenidos durante el período. Se recopiló información de la base de datos del pabellón central sobre el diagnóstico, la edad, el sexo y el tipo de procedimiento quirúrgico. Se incluyeron 125 procedimientos quirúrgicos realizados en 109 pacientes. Resultados: La edad promedio de los pacientes intervenidos fue de 38 años, con preponderancia del sexo masculino (70,6%). El 50,4% de los procedimientos quirúrgicos correspondieron a traumatismos en el territorio maxilofacial, de los cuales la fractura mandibular fue la lesión más frecuente (68,3%). El 46,4% de los procedimientos correspondieron a infecciones en el territorio maxilofacial, en los cuales la localización más frecuente fue el espacio anatómico submandibular (25,8%). El resto de los procedimientos se relacionó con otro tipo de diagnósticos (3,2%). Discusión: En general los resultados concuerdan con estudios similares realizados en hospitales de atención de urgencia. Conclusión: Dentro de las patologías de urgencia del territorio maxilofacial, las lesiones traumáticas e infecciones son las que con mayor frecuencia requieren de cirugía mayor bajo anestesia general. Los pacientes intervenidos con cirugía bajo anestesia general en pabellón central son principalmente hombres, siendo las fracturas mandibulares y la infección del espacio submandibular las lesiones más frecuentes en cada tipo de patología.

Objective: To determine the experience of the specialty in Oral and Maxillofacial Surgery and Traumatology at the Hospital Emergency Assistance Publique, through epidemiology of surgical treatments carried out in major operating room, under general anesthesia during the period between November 2014 and July 2016. Material and methods: A retrospective study where the operative protocols of patients operated during the period analyzed was performed. Database information from major operating room for diagnosis, age, sex and type of surgical procedures was collected. 125 surgical procedures performed in 109 patients were included. Results: The average age of the operated patients was 38 years with a preponderance of males (70.6%); 50.4% of surgical procedures were for injuries in the maxillofacial area, where the mandibular fracture was the most common lesion (68.3%); 46.4% of the procedures were for infections in maxillofacial area, where the most common location was the submandibular anatomical space (25.8%). The rest of the procedures related to other diseases (3.2%). Discussion: In general the results are consistent with similar studies in emergency care hospitals. Conclusion: Within the pathologies of urgency of the maxillofacial territory, traumatic injuries and infections are those that most frequently require major surgery under general anesthesia. Patients undergoing surgery under general anesthesia in major operating room are mainly men, with mandibular fractures and submandibular space infections being the most frequent lesions in each type of pathology.

Situación epidemiológica de las meningoencefalitis bacterianas / Epidemiological situation of bacterial meningoencephalitis

Se describen los casos de meningoencefalitis bacterianas exponiendo el análisis histórico de algunas variables y a continuación la información desde la Semana epidemiológica (SE) 1 a la 25 del año 2017 que provienen de la notificación por canales oficiales: SNVS (módulos C2/SIVILA) y SIC (Sistema de Información epidemiológica de CABA). El análisis de las infecciones invasivas no meníngeas será realizado en próximas actualizaciones. Los casos fueron notificados a través de estos sistemas por los efectores públicos y privados de la Ciudad. El análisis de los mismos se realizó de manera individual a fin de evitar duplicaciones, excluyendo los casos descartados e integrando la información en una base unificada. Se incluyeron como residentes de CABA a todos aquellos que se domicilian en la Ciudad y aquellos casos atendidos en efectores de la CABA cuyo domicilio es desconocido al momento del análisis. La construcción de las tasas, se realizó en base a las proyecciones poblacionales aportadas por la Dirección de Estadística y Censos (DGEyC) de la Ciudad Autónoma de Buenos Aires. (AU)

Perfil microbiológico de infecciones urinarias asociadas a cateterismo permanente en el Hospital de Talca / Microbiological profile of urinary infections associated to permanent catheterization at Hospital de Talca

Urinary tract infection associated to permanent catheterization is the most frequent infection associated to health care. Antibiotic resistance is an increasing problem, thus it is important to know the local pathogenic agents, their resistance and sensibility profiles to use an optimal treatment. OBJECTIVES: Describe the resistance and sensibility profiles in the most frequent microorganisms in urinary tract infections associated to permanent catheterization at the Internal Medicine Service of Hospital Regional de Talca. METHODS: We studied the antibiotic resistance and sensitivity of each microorganism isolated from urinary samples from patients with the antecedent of permanent urinary catheterization at the Internal Medicine Service of Hospital Regional de Talca since January 2013 to December 2016, according to the records at the Cross Infection Unit of this center. OUTCOMES: We collected 69 cases, there were 14 of them with two agents. The highest incidence of urinary tract infections associated to permanent urinary catheterization was at 2014, while the lowest at 2015. The most frequent agents detected were K. pneumoniae (34%), E. coli (20%), P. aeruginosa (20%) and A. baumannii (5%), holding a similar tendency in each year. We found 23 strains of Enterobacteriaceae producing Extended-spectrum ß- Lactamases. In general we found that Carbapenems and Amikacin had the best sensitivity while Nitrofurantoin and Ciprofloxacin had the highest resistance

Detección molecular de Escherichia coli diarreogénica en pacientes pediátricos con síndrome diarreico agudo en Paraguay / Molecular detection of diarrheogenic Escherichia coli in pediatric patients with acute diarrheal syndrome in Paraguay

La Escherichia coli diarreogénica (ECD) se ha clasificado con base en criterios clínicos, epidemiológicos y moleculares en cinco grupos, cada uno con factores de virulencia específicos. El objetivo fue determinar la prevalencia de ECD en pacientes pediátricos con enfermedad diarreica aguda del Laboratorio Central de Salud Publica en el periodo 2012- 2015. Se procesaron muestras de heces con síndrome diarreico agudo, provenientes de pacientes pediátricos, en los cuales se buscó algún gen de virulencia ECD utilizando métodos convencionales de siembra y screening molecular, mediante PCR múltiple con cebadores diseñados específicamente para amplificar los genes de virulencia elt, est, eae, stx, ipaH y aggR. Del total de muestras analizadas, 13% (180/1379) de las muestras presentó algún factor de virulencia compatible con algún patotipo ECD con mayor predominio en niños de 1 a 3 años. La frecuencia de los distintos patotipos fue la siguiente: 61 (34%) ETEC, 40 (22%) EAEC, 41 (23%) EPEC, 27 (15%) EIEC, 7 (4%) STEC y 3 (2%) ETEC/EAEC, 1 (0.5%) ETEC/EAEC/EIEC. El porcentaje de E. coli diarreogénicas detectado tiene similitud con lo reportado en otros países de la región, lo que nos indica que estos patógenos son parte importante de la etiología de la enfermedad diarreica aguda infecciosa en la población infantil en nuestro país. Se debe destacar que para el diagnóstico de las diferentes categorías ECD, es necesario disponer de un procedimiento diagnóstico específico dirigido a la detección de los factores de virulencia utilizando métodos moleculares o métodos inmunológicos.

Diarrheagenic Escherichia coli (DEC) has been classified based on clinical, epidemiological and molecular criteria in five groups, each with specific virulence factors. The objective was to determine the prevalence of DEC in pediatric patients with acute diarrheal disease of the Central Laboratory of Public Health in the 2012-2015 period. A total of 1447 fecal samples of acute diarrheal syndrome from pediatric patients were processed in which a DEC virulence gene was searched using conventional screening and molecular screening methods with multiple PCR primers specifically designed to amplify virulence genes, st, lt, eae, stx, ipaH and aggR. From the total of analyzed samples, 13% (180/1379) of the samples presented some virulence factor compatible with a DEC pathogen type with greater predominance in children from 1 to 3 years. The frequency of the different pathogen types was as follows: 61 (34%) ETEC, 40 (22%) EAEC, 41 (23%) EPEC, 27 (15%) EIEC, 7 (4%) STEC and 3 (2% ETEC/EAEC, 1 (0.5%) ETEC/EAEC/EIEC. The percentage of DEC detected is similar to that reported in other countries of the region, which indicates that these pathogens are an important part of the etiology of acute infectious diarrheal disease in children in our country. It should be noted that for the diagnosis of different DEC categories, it is necessary to have a specific diagnostic procedure aimed at the detection of virulence factors using molecular methods or immunodiagnostic methods.

Culture-dependent approaches to explore the prevalence of root canal pathogens from endodontic infections

Abstract: Endodontic infections are considered to be caused by the presence of various microorganisms within the root canal system. Recognition of this microbiota contributes to the successful treatment of infected root canals. This study investigated the microorganisms associated with primary and secondary endodontic infections via culture methods, biochemical tests, and molecular approaches in an Iranian population. Microbial specimens were collected from 36 patients with primary endodontic infection and 14 patients with a history of root canal therapy. Advanced microbiological culture techniques were used to isolate microbiota; subsequently, biochemical tests and 16S ribosomal RNA gene sequencing were performed to identify the microorganisms. Within the total 218 cultivable isolates, Veillonella parvula (20.6%) was found to occur with the highest frequency in primary endodontic infection, followed by Porphyromonas gingivalis (14.1%), and Aggregatibacter actinomycetemcomitans (9.2%). Enterococcus faecalis (36.6%) was the most predominant microorganism in secondary endodontic infections, followed by Candida albicans, Propionibacterium acnes, and V. parvula with frequencies of 20%, 2%, and 2%, respectively. It was concluded that V. parvula and E. faecalis was most frequently found in primary and secondary endodontic infections, respectively.

Serological evidence of exposure to tick-borne agents in opossums (Didelphis spp. ) in the state of São Paulo, Brazil / Evidência sorológica de exposição a agentes transmitidos por carrapatos em gambás (Didelphis spp. ) no estado de São Paulo, Brasil

Abstract This work involved a serological investigation of tick-borne pathogens in opossums in eight municipalities of the state of São Paulo, Brazil. Serum samples from 109 opossums (91 Didelphis aurita and 18 Didelphis albiventris) were tested to detect antibodies to Rickettsia rickettsii (Taiaçu strain, 1:64 cut-off) and Ehrlichia canis (São Paulo strain, 1:40 cut-off), by indirect immunofluorescence assay (IFA); and against Borrelia burgdorferi (strain G39/40) by enzyme-linked immunosorbent assay (ELISA). The presence of antibodies to anti-R. rickettsii, anti-E. canis and anti-B. burgdorferi was detected in 32 (29.35%), 16 (14.67%) and 30 (27.52%) opossums, respectively. Opossum endpoint titers ranged from 64 to 1,024 for R. rickettsii, from 40 to 160 for E. canis, and from 400 to >51,200 for B. burgdorferi. These serological results suggest that opossums have been exposed to Rickettsia spp., Ehrlichia spp., and B. burgdorferi-related agents in the state of São Paulo. Our study underscores the need for further research about these agents in this study area, in view of the occurrence of Spotted Fever and Baggio-Yoshinari Syndrome disease in humans in the state of São Paulo, Brazil.

Resumo O presente estudo investigou evidência sorológica de agentes transmitidos por carrapatos em gambás em oito municípios do Estado de São Paulo, Brasil. Amostras de soro de 109 gambás (91 Didelphis aurita e 18 Didelphis albiventris) foram testadas para detecção de anticorpos contra Rickettsia rickettsii (cepa Taiaçu, ponto de corte 1:64) Ehrlichia canis (cepa São Paulo, ponto de corte 1:40), pela reação de imunofluorescência indireta (RIFI); e contra Borrelia burgdorferi (cepa G39/40) pelo teste imunoenzimático (ELISA). A presença de anticorpos anti-R. rickettsii, anti-E. canis e anti-B. burgdorferi foi detectada em 32 (29,35%), 16 (14,67%) e 30 (27,52%) gambás, respectivamente. Os títulos finais variaram de 64 a 1.024 para R. rickettsii, de 40 a 160 para E. canis, e de 400 a >51.200 para B. burgdorferi. Esses resultados sugerem que os gambás foram expostos a agentes relacionados à Rickettsia spp., Ehrlichia spp., e B. burgdorferi no Estado de São Paulo. Neste estudo salienta a necessidade de novas pesquisas sobre esses agentes nessas áreas de trabalho, devido à ocorrência da Febre Maculosa e da Síndrome Baggio-Yoshinari em humanos no Estado de São Paulo, Brasil.

Método de clasificación de mortinatos según condición obstétrica relevante de la muerte fetal, en un hospital público de Chile (Método CORM) / A new fetal death classification system

Background: Stillbirth is the mayor contributor to perinatal mortality. Aim: To report a system for classification of fetal deaths. Material and Methods: Retrospective cohort study of 29,916 births with 258 fetal deaths that occurred in a public hospital. Data were obtained from audit reports of stillbirths. The method for classification “obstetric condition relevant to the death” was applied, based on obstetric and placental pathological findings analyzed exclusively by a single obstetrician and a single pathologist. Results: Ninety two percent of obstetric conditions causing fetal death were identified. The most commonly reported were ascending bacterial infection in 26%, congenital anomalies in 19%, arterial hypertension in 12% and placental pathology in 12%. Fetal growth restriction was identified in 50% of stillbirths. Ninety percent were secondary to a primary obstetric condition and 10% had an unexplained cause. Placental abruption as the final cause of fetal death was identified in 60% of cases with arterial hypertension, 43% of cases with placental pathology and 37% of ascending infections. Fetal deaths occurred during pregnancy in 82% of cases and during labor in 17%. Intrapartum asphyxia occurred in 0.8% of stillbirths and presented in term pregnancies. Conclusions: The “obstetric condition relevant to the death” method for classification of fetal death is effective to identify the originating obstetric cause of stillbirth and reduces the impact of fetal growth restriction and intrapartum asphyxia as the leading causes of death.

Obesidad, factor de riesgo de infección bacteriana ascendente durante el embarazo / Obesity, a risk factor for ascending bacterial infection during pregnancy

Background: Obesity in pregnancy is associated with significantly higher rates of infection. Aim: To compare the infectious morbidity in pregnant women with normal and altered body mass index (BMI). Material and Methods: Cross sectional retrospective study of 6,150 patients who had delivery or second trimester abortion during 2012. The patients were classified according to BMI as underweight, normal weight, overweight and obese. We compared the frequency of pregnancy and perinatal complications related to ascending bacterial infection (ABI). The data was obtained from the hospital’s databases. Results: Obese patients had higher rates of pregnancy and perinatal complications related to ABI compared to patients with normal weight. The odds ratios (OR) and 95% confidence intervals (CI) for second trimester abortion were 3.45 (1.63-7.31) p < 0.01, for preterm delivery 2.42 (1.51-3.87) p < 0.01, for labor and puerperium infections 3.42 (2.06-5.68) p < 0.01 and for early neonatal infectious and perinatal mortality 4.46 (1.75-11.37) p < 0.01. A logistic regression analysis revealed that obesity is an independent risk factor for second trimester abortion related to ABI with an OR of 3.18 (CI 95% 1.46-6.91), premature delivery related to ABI with an OR of 2.51 (CI 95% 1.54-4.09) and for delivery and postpartum infections with an OR of 4.44 (CI 95% 2.62 to 7.51). Conclusions: Obese pregnant women had a 2.5 to 4.5 times increased risk of infectious morbidity compared to normal weight patients. Obesity is an independent risk factor for second trimester abortion and preterm delivery related to ABI and delivery and postpartum infectious.