Epidemiología y clínica de las infecciones y colonizaciones causadas por enterobacterias productoras de carbapenemasas en un hospital de tercer nivel / Epidemiology and clinical of infections and colonizations caused by Enterobacterales producing carbapenemases in a tertiary hospital

OBJETIVOS: Describir la epidemiologia de las Enterobacterias portadoras de carbapenemasas (EPC) en un hospital de tercer nivel. MATERIAL Y MÉTODOS: Estudio observacional retrospectivo, se incluyeron todos los pacientes con muestra positiva para EPC atendidos en hospitalización o en el servicio de Urgencias, entre el 1 Enero de 2014 y el 31 de Diciembre de 2016. RESULTADOS: Se incluyeron 272 pacientes (316 muestras): 155 (57%) varones. Media de edad de 70,4 años (IC 95% 68,2-72,7). Media del índice de Charlson 3,6 (IC95% 3,4-3,8). En el 63,2% la adquisición fue nosocomial, en el 35,3% fue asociada a cuidados sanitarios (ACS). Presentaron infección el 55,1%, siendo la más frecuente la infección del tracto urinario (ITU) (58,7%). Las especies más frecuentes fueron Klebsiella pneumoniae (62,7%) y Enterobacter cloacae (10,1%). Los tipos de carbapenemasa más frecuente fueron OXA-48 (53,8%) y VIM (43%). La adquisición nosocomial se asoció con el género masculino, trasplante, inmunosupresión, ingreso en Unidad de Cuidados Intensivos (UCI) o Servicio Quirúrgico, tratamiento antibiótico previo, Enterobacter, VIM, infecciones respiratorias e intraabdominales. La adquisición ACS se asoció con mayor edad y comorbilidad, procedencia de residencia, sondaje vesical, mayor número de procedimientos ambulatorios, ingreso hospitalario previo, K. pneumoniae y E. coli, OXA-48, coproducción de betalactamasas de espectro extendido, ITU y sepsis. CONCLUSIONES: Los pacientes que adquieren la EPC en residencias presentan frecuentemente infección. Los pacientes con adquisición nosocomial se colonizan por EPC en la UCI, en relación a procedimientos invasivos y trasplante. Esta población presenta mayor mortalidad por desarrollar infecciones respiratorias por EPC

OBJECTIVE: To describe the epidemiology of Enterobacterales producing carbapenemases (EPC) in a tertiary hospital. MATERIAL AND METHODS: A retrospective observational study, all patients with a positive sample for EPC treated in hospitalization or in the Emergency Department were included, between January 1, 2014 and December 31, 2016. RESULTS: A total of 272 patients (316 samples) were included: 155 (57%) male. Mean age of 70.4 years (95% CI 68.2 -72.7). Mean Charlson index was 3.6 (95% CI 3.4-3.8). In 63.2% the acquisition was nosocomial, in 35.3% it was health-care associated (HA). 55.1% presented infection, the most frequent infection was urinary tract infection (UTI) (58.7%). The most frequent species were Klebsiella pneumoniae (62.7%) and Enterobacter cloacae (10.1%). The most frequent types of carbapenemase were OXA-48 (53.8%) and VIM (43%). The nosocomial acquisition was associated with the male gender, transplantation, immunosuppression, admission to the Intensive Care Unit (ICU) or surgical service, prior antibiotic treatment, Enterobacter, VIM, respiratory and intra-abdominal infections. The HA acquisition was associated with age and comorbidity, nursery home origin, bladder catheterization, greater number of outpatient procedures, previous hospital admission, K. pneumoniae and E. coli, OXA-48, coproduction of extended spectrum betalactamases, UTI and sepsis. CONCLUSIONS: Patients who acquire EPC in nursery homes frequently have an infection. Patients with nosocomial acquisition are colonized by EPC in the ICU, in relation to invasive procedures and transplantation. This population has a higher mortality due to developing respiratory infections by EPC

Characteristics of Clostridium difficile infection in patients with discordant diagnostic test results

Background: Clinical features of Clostridium difficile infection (CDI) cases diagnosed by detection of polymerase chain reaction (PCR), with negative toxin enzyme immunoassay results (EIA) have not been fully elucidated. The purpose of this study was to determine the magnitude of CDI patients who had negative EIA toxin determinations but positive PCR tests, and their differences in clinical presentation. Methods: We performed a retrospective study comparing the clinical features of CDI cases detected by EIA (toxins A + B) with cases detected by PCR (toxin negative, PCR positive) over a 16-month period. Only patients with an initial Clostridium difficile infection episode that fulfilled a standardized definition were included. Results: During the study period, 107 episodes of CDI were detected. Seventy-four patients (69%) had positive glutamate dehydrogenase (GDH) antigen and EIA determinations (EIA positive patients). Thirty-three patients (31%) had GDH positive, negative toxin EIA and positive PCR determination (PCR positive patients). PCR positive patients were younger, 57 (27) years (mean [SD]), than EIA positive patients, 71 (16) years, (p < 0.001). Fewer PCR positive patients were receiving proton pump inhibitors (21 patients, 64%) than EIA positive patients (61 patients, 82%, p = 0.034). The clinical presentation was similar in both groups. In the multivariate analysis, lower age was identified as the only independent variable associated with PCR positive patients. Conclusions: One third of Clostridium difficile infection patients present negative toxin EIA and PCR positive tests. Performing PCR determination after the negative EIA test is more relevant in younger patients (AU)

No disponible

Characteristics of Clostridium difficile infection in patients with discordant diagnostic test results.

BACKGROUND: Clinical features of Clostridium difficile infection (CDI) cases diagnosed by detection of polymerase chain reaction (PCR), with negative toxin enzyme immunoassay results (EIA) have not been fully elucidated. The purpose of this study was to determine the magnitude of CDI patients who had negative EIA toxin determinations but positive PCR tests, and their differences in clinical presentation. METHODS: We performed a retrospective study comparing the clinical features of CDI cases detected by EIA (toxins A + B) with cases detected by PCR (toxin negative, PCR positive) over a 16-month period. Only patients with an initial Clostridium difficile infection episode that fulfilled a standardized definition were included. RESULTS: During the study period, 107 episodes of CDI were detected. Seventy-four patients (69%) had positive glutamate dehydrogenase (GDH) antigen and EIA determinations (EIA positive patients). Thirty-three patients (31%) had GDH positive, negative toxin EIA and positive PCR determination (PCR positive patients). PCR positive patients were younger, 57 (27) years (mean [SD]), than EIA positive patients, 71 (16) years, (p < 0.001). Fewer PCR positive patients were receiving proton pump inhibitors (21 patients, 64%) than EIA positive patients (61 patients, 82%, p = 0.034). The clinical presentation was similar in both groups. In the multivariate analysis, lower age was identified as the only independent variable associated with PCR positive patients. CONCLUSIONS: One third of Clostridium difficile infection patients present negative toxin EIA and PCR positive tests. Performing PCR determination after the negative EIA test is more relevant in younger patients.

Risk factors for Clostridium difficile diarrhea in patients with inflammatory bowel disease.

BACKGROUND: Despite the growing incidence of Clostridium difficile diarrhea (CCD) in patients with inflammatory bowel disease (IBD), little is known about the associated risk factors. METHOD: A retrospective study comparing cases of CCD in patients with IBD to IBD carriers who did not develop CCD. A comparison was also made with patients who developed CCD but did not suffer IBD. RESULTS: Three cases (20%) with IBD and CCD had received antibiotics during the previous three months versus none of the controls (IBD without CCD, p = 0.22). Ten cases (67%) received treatment with proton pump inhibitors (PPIs) versus 2 (13%) in the control group (IBD without CCD, p = 0.001). Seven cases underwent colonoscopy and pseudomembranes were seen in one (14%). Fourteen (93%) patients demonstrated a favourable response to metronidazole. Patients with IBD and CCD presented with younger age (36 ± 10 years), a higher degree of community-acquired infection (13 patients, 87%), immunosuppressive treatment (7 patients, 47%) and less patients had received previous antibiotic treatment (3 patients, 20%) than those with CCD without IBD. The proportion of patients who received treatment with PPIs was similar (66% and 80%, respectively p = 0.266). CONCLUSIONS: CCD in IBD carriers affects younger patients, the majority are community acquired (less nosocomial) and it is more related to previous treatment with PPIs than with the antibiotic treatment. Clinical evolution is also favourable.

Factores de riesgo de diarrea por Clostridium difficile en pacientes con enfermedad inflamatoria intestinal / Risk factors for Clostridium difficile diarrhea in patients with inflammatory bowel disease

INTRODUCCIÓN: a pesar de la incidencia creciente de diarrea por Clostridium difficile (DCD) en pacientes con enfermedad inflamatoria intestinal (EII) disponemos de un conocimiento limitado de factores de riesgo. MÉTODO: estudio retrospectivo comparando casos de DCD en pacientes con EEI con pacientes portadores de EEI que no desarrollaron DCD. También se realizó una comparación con pacientes que desarrollaron DCD, pero que no padecían EII. RESULTADOS: tres casos (20 %) con EII y DCD habían recibido antibióticos durante los tres meses previos frente a ninguno de los controles (EEI sin DCD, p = 0,22). Diez casos (67 %) estaban recibiendo tratamiento con un inhibidor de la bomba de protones (IBP) frente a dos (13 %) entre los controles (EEI sin DCD, p = 0,001). Se visualizaron pseudomembranas en uno (14 %) de los siete casos en los que se hizo colonoscopia. Hubo respuesta favorable a metronidazol en 14 pacientes (93 %). Los pacientes con EEI y DCD presentaron menor edad (36 ± 10 años), mayor grado de adquisición comunitaria de la infección (13 pacientes, 87 %) y tratamiento inmunosupresor (7 pacientes, 47 %) junto a menos pacientes con tratamiento antibiótico previo (3 pacientes, 20 %) que los pacientes con DCD pero sin EII. La proporción de pacientes que recibían tratamiento con un IBP era similar (66 % y 80 %, respectivamente; p = 0,266). CONCLUSIONES: los casos de DCD en portadores de EEI se caracterizan por afectar a pacientes más jóvenes, mayoritaria adquisición comunitaria (y menor nosocomial), guardar más relación con el tratamiento previo con IBP que con el tratamiento antibiótico y presentar evolución clínica favorable

BACKGROUND: Despite the growing incidence of Clostridium difficile diarrhea (CCD) in patients with inflammatory bowel disease (IBD), little is known about the associated risk factors. METHOD: A retrospective study comparing cases of CCD in patients with IBD to IBD carriers who did not develop CCD. A comparison was also made with patients who developed CCD but did not suffer IBD. RESULTS: Three cases (20 %) with IBD and CCD had received antibiotics during the previous three months versus none of the controls (IBD without CCD, p = 0.22). Ten cases (67 %) received treatment with proton pump inhibitors (PPIs) versus 2 (13 %) in the control group (IBD without CCD, p = 0.001). Seven cases underwent colonoscopy and pseudomembranes were seen in ne (14 %). Fourteen (93 %) patients demonstrated a favourable response to metronidazole. Patients with IBD and CCD presented with younger age (36 ± 10 years), a higher degree of communityacquired infection (13 patients, 87 %), immunosuppressive treatment (7 patients, 47 %) and less patients had received previous antibiotic treatment (3 patients, 20 %) than those with CCD without IBD. The proportion of patients who received treatment with PPIs was similar (66 % and 80 %, respectively p = 0.266). CONCLUSIONS: CCD in IBD carriers affects younger patients, the majority are community acquired (less nosocomial) and it is more related to previous treatment with PPIs than with the antibiotic treatment. Clinical evolution is also favourable

Demanda de atención hospitalaria por gripe A/H1N1: evaluación de los primeros 1.000 casos atendidos / Hospital care of patients with A/H1N1 influenza: Evaluation of the first 1000 reported cases in Spain

Introducción y objetivos: A pesar del enorme impacto que se prevé tenga la pandemia por gripe A/H1N1 en países del hemisferio norte, todavía son escasos los datos disponibles de su repercusión a nivel hospitalario. El objetivo de este trabajo es evaluar la asistencia prestada a los pacientes atendidos por posible gripe A y su evolución en un hospital de tercer nivel.Material y método: Desde la aparición de los primeros casos se estableció un circuito específico de atención a pacientes con posible gripe A en la unidad de admisión, urgencias y hospitalización. Se diseñó un registro nominal con variables epidemiológicas y variables clínicas.Resultados: A 31 de agosto de 2009 se habían evaluado 1.018 pacientes por posible gripe A, de los que el 77% cumplía criterios clínicos. Entre los pacientes con sospecha de gripe A, la edad media (desviación estándar) fue de 31,71 (17,2) años, el 52% eran mujeres, un 3,3% de ellas embarazadas o puérperas. Ingresó el 23,4%, y la estancia media global fue de 3,5 días y de 2,5 días para los adultos que ingresaron en la unidad de corta estancia. Un 2,8% presentó neumonía y 2 pacientes necesitaron atención en unidad de cuidados intensivos (uno de ellos falleció).Conclusiones: Nuestra serie muestra una epidemia de gripe que se comporta de forma benigna con un porcentaje considerable de neumonías, pero que evolucionan favorablemente. A pesar del alto porcentaje de ingresos, y para evitar el menoscabo de la atención a otros enfermos, consideramos que un modelo asistencial basado en unidades específicas, estancias cortas y seguimiento posthospitalario puede ser adecuado (AU)

Introduction and objectives: Influenza A is expected to have a great impact in countries in the northern hemisphere yet little has been reported about how this outbreak can affect hospital care. The aim of this study is to assess patients who demand care for flu symptoms and their outcome. Material and methods: From the beginning of the outbreak a specific protocol was established for the care of patients with potential influenza A in admission, emergency and hospitalization ward. A nominal registry was designed with clinical and epidemiological data.Results: 1018 patients were evaluated for potential influenza A from the beginning of the outbreak until the 31st August, 2009. 77% of them fulfilled clinical criteria and were classified as suspected cases. Mean age was 31,7 years (SD17,2), 52% were women, 3,3% pregnant or puerperal. The admission rate was 23,4% with a global mean stay of 3,5 days, and 2,5 for the adults who were admitted to the short stay hospital unit. 2,8 % had pneumonia, two patients required admission to the intensive care unit and one of them died.Conclusions: Our data show an outbreak with mild illness, with a remarkable percentage of pneumonia but with good outcome. Despite of the high percentage of admissions, and in order to avoid the misleading attention to other patients, we believe that an assistance model based in specific units, short stay and post-discharge follow up could be suitable (AU)

[Hospital care of patients with A/H1N1 influenza: evaluation of the first 1000 reported cases in Spain]. / Demanda de atención hospitalaria por gripe A/H1N1: evaluación de los primeros 1.000 casos atendidos.

INTRODUCTION AND OBJECTIVES: Influenza A is expected to have a great impact in countries in the northern hemisphere yet little has been reported about how this outbreak can affect hospital care. The aim of this study is to assess patients who demand care for flu symptoms and their outcome. MATERIAL AND METHODS: From the beginning of the outbreak a specific protocol was established for the care of patients with potential influenza A in admission, emergency and hospitalization ward. A nominal registry was designed with clinical and epidemiological data. RESULTS: 1018 patients were evaluated for potential influenza A from the beginning of the outbreak until the 31(st) August, 2009. 77% of them fulfilled clinical criteria and were classified as suspected cases. Mean age was 31,7 years (SD17,2), 52% were women, 3,3% pregnant or puerperal. The admission rate was 23,4% with a global mean stay of 3,5 days, and 2,5 for the adults who were admitted to the short stay hospital unit. 2,8 % had pneumonia, two patients required admission to the intensive care unit and one of them died. CONCLUSIONS: Our data show an outbreak with mild illness, with a remarkable percentage of pneumonia but with good outcome. Despite of the high percentage of admissions, and in order to avoid the misleading attention to other patients, we believe that an assistance model based in specific units, short stay and post-discharge follow up could be suitable.