Brote de histoplasmosis en el contexto de la pandemia por COVID-19 / Histoplasmosis outbreak in the context of the COVID-19 pandemic

La histoplasmosis es una micosis profunda de distribución mundial causada por el Histoplasma capsulatum var. capsulatum. Se caracteriza por una variabilidad clínica que depende principalmente de la carga fúngica, del estado inmunológico del paciente y de la virulencia del germen. Se describe un brote de histoplasmosis pulmonar aguda en militares, producido en el contexto epidemiológico de la COVID-19. El episodio tuvo lugar a partir de actividad laboral en cuevas donde participaron cuatro militares, tres de los cuales desarrollaron síntomas y fueron admitidos en el Hospital Dr. Gustavo Aldereguía Lima de Cienfuegos en enero de 2022. La información fue obtenida a través de la entrevista médica y la historia clínica. Se evidenció que en el contexto epidemiológico de la pandemia por COVID-19 no se debe subestimar el diagnóstico de otras enfermedades respiratorias, incluidas las micosis endémicas(AU)

Histoplasmosis is a deep mycotic infection of worldwide distribution caused by Histoplasma capsulatum var. capsulatum. It is characterized by clinical variability that depends mainly on the fungal load, the patient's immune status and the virulence of the germ. We describe an outbreak of acute pulmonary histoplasmosis among military officers, which occurred in the epidemiological context of COVID-19. The episode occurred during work activities in caves in which four soldiers participated, three of whom developed symptoms and were admitted to the "Dr. Gustavo Aldereguía Lima" Hospital in Cienfuegos in January 2022. The information was obtained through medical interviews and clinical records. It was evidenced that in the epidemiological context of the COVID-19 pandemic, the diagnosis of other respiratory diseases, including endemic mycoses, should not be underestimated(AU)

Caracterización epidemiológica del brote de dengue en el Hospital Pediátrico Dr. Hugo Mendoza, República Dominicana, SE1-SE38, 2023 / Epidemiological characterization of the dengue outbreak in the Dr. Hugo Mendoza Pediatric Hospital, Dominican Republic, SE1-SE38, 2023

El dengue es una enfermedad viral transmitida por vector, mosquitos del género Aedes, endémica en gran parte de los países tropicales. El objetivo de este estudio es describir el brote epidemiológico de dengue ocurrido en el Hospital Pediátrico Dr. Hugo Mendoza de Santo Domingo a través de los registros clínicos-epidemiológicos del hospital. Se han calculado tasas de mortalidad, letalidad, incidencias, tasas de hospitalización y se compararon entre grupos de edad, lugar y sexo. El brote de dengue del 2023 en República Dominicana ha sido el más grande de la historia del país. En el hospital se han tenido que ingresar al 92,51% de los pacientes diagnosticados con el fin de monitorizar la enfermedad. Se reportaron un total de 1149 casos de dengue. Se produjeron un total de 16 muertes probables. La importancia del uso de medidas de prevención es primordial para evitar futuros brotes como el sufrido este año. (AU)

Dengue is a viral disease transmitted by vector, mosquitoes of the genus Aedes, endemic in much of tropical countries. The objective of this study is to describe the epidemiological outbreak of dengue that occurred at the Dr. Hugo Mendoza Pediatric Hospital in Santo Domingo through the clinical-epidemiological records of the hospital. Mortality, fatality, incidence, and hospitalization rates have been calculated and compared between age groups, location, and sex. The 2023 dengue outbreak in the Dominican Republic has been the largest in the country’s history. 92.51% of the diagnosed patients have had to be admitted to the hospital in order to monitor the disease. A total of 1,149 cases of dengue were reported. A total of 16 probable deaths occurred. The importance of using preventive measures is essential to avoid future outbreaks like the one suffered this year. (AU)

Diferencias entre formas de contagio intra y extradomiciliaria en tres brotes epidémicos de COVID-19 en Santiago de Cuba / Differences between Forms of Intra- and Extra-Domiciliary Contagion in Three Epidemic Outbreaks of COVID-19 in Santiago de Cuba

Introducción: En la transmisión de la COVID-19 en Santiago de Cuba se distinguieron tres brotes epidémicos entre 2020 y 2021. Objetivo: Identificar las diferencias entre los contagios intra y extradomiciliarios en tres brotes epidémicos de COVID-19 en Santiago de Cuba entre marzo de 2020 y mayo de 2021. Métodos: Se realizó un estudio descriptivo transversal de los casos de COVID-19 del territorio y el período referidos, mediante las técnicas bivariadas habituales de la estadística y el análisis estadístico implicativo, con una muestra de 6408 que se eligió por muestreo aleatorio simple de la base de datos de casos confirmados. Resultados: El contagio extradomiciliario fue significativamente mayor que el intradomiciliario sin diferencias por sexo, pero sí según grupos de edades y municipios dentro y entre ambos grupos. Fue significativo el predominio de los adultos mayores en el contagio intradomiciliario y de los adultos jóvenes en el extradomiciliario. Primaron los sintomáticos en el intradomiciliario; y, los asintomáticos, en el extradomiciliario, sin diferencias significativas entre ambas formas. Los menores de 20 años de edad, adultos mayores, asintomáticos y el municipio Mella fueron las características que se asociaron con el contagio intradomiciliario, mientras, con el extradomiciliario, los adultos jóvenes sintomáticos. Conclusiones: Las formas de contagio intra y extradomiciliaria se modularon según la conducta de las personas y el aislamiento propio de cada grupo de edades. La extradomiciliaria predominó en edades intermedias de la vida, como expresión de la conducta mediada por su responsabilidad económica en el hogar, mientras las edades extremas, que permanecieron en casa por cumplir medidas de aislamiento, fueron más propensas a la intradomiciliaria(AU)

Introduction: In the transmission of COVID-19 in Santiago de Cuba province, three epidemic outbreaks were observed between 2020 and 2021. Objective: To identify the differences between intra- and extra-domiciliary infections in three epidemic outbreaks of COVID-19 in Santiago de Cuba between March 2020 and May 2021. Methods: A cross-sectional descriptive study of COVID-19 cases in the territory and period above mentioned was carried out, using the usual bivariate techniques of statistics and implicative statistical analysis, to a sample of 6408 cass that was chosen by simple random sampling from the database of confirmed cases. Results: Extra-domiciliary contagion was significantly higher than intra-domiciliary contagion without differences by sex, but according to age groups and municipalities within and between both groups. The predominance of older adults in intra-domiciliary contagion and of young adults in extra-domiciliary contagion was significant. Symptomatic patients prevailed in the intra-domiciliary; and, the asymptomatic, in the extra-domiciliary, without significant differences between both forms. Children under 20 years of age, older adults, asymptomatic and Mella municipality were the characteristics that were associated with intra-domiciliary contagion, while, with the extra-domiciliary were related symptomatic young adults. Conclusions: The forms of intra- and extra-domiciliary contagion were modulated according to the behavior of the people and the isolation of each age group. Extra-domiciliary predominated in intermediate ages of life, as an expression of the behavior mediated by their economic responsibility at home, while extreme ages, who remained at home to comply with isolation measures, were more prone to intra-domiciliary contagion(AU)

Importancia de la investigación epidemiológica de un brote de Salmonella en un entorno escolar / Importance of the epidemiological investigation of a Salmonella outbreak in a school setting

Introducción: se describe un brote de gastroenteritis por Salmonella en un centro de educación infantil y un colegio público vecino en una localidad del sur de la Comunidad de Madrid (España) entre octubre y noviembre de 2019. Objetivos: describir las características epidemiológicas de un brote de salmonelosis, analizar el mecanismo de transmisión, reforzar la importancia de la declaración sanitaria. Material y métodos: estudio descriptivo bidireccional de casos de salmonelosis notificados por diversas fuentes relacionados con un colectivo escolar. Análisis de variables de los ingresados. Investigación epidemiológica y caracterización microbiológica. Resultados: se registraron 38 casos (entre 7 meses y 8 años; media: 2,7 años). Pertenecían a dos centros educativos: el 57,9% eran alumnos de una escuela infantil; el resto, del colegio vecino, acudían a ella para comer o como ludoteca. Ingresaron 12 (3 hospitales). No hubo complicaciones graves. En el Centro Nacional de Microbiología se identificó en coprocultivos Salmonella entérica, typhimurium monofásica 4,5,12:i:-. En la inspección se evidenció que el origen no era alimentario y, en cambio, que sí existía riesgo de transmisión fecal-oral de persona a persona y por contaminación de superficies; no había separación física óptima entre zonas. Se hicieron propuestas de mejora. No se registraron casos posteriormente. Conclusiones: el brote fue de origen no alimentario; su análisis permitió tomar medidas para evitar casos secundarios posteriormente. Se considera de gran importancia la notificación de casos para tomar medidas de salud pública adecuadas (AU)

Introduction: we describe an outbreak of Salmonella gastroenteritis in an early childhood education centre and a neighbouring public school in a town in the south of the Community of Madrid (Spain) in October and November 2019. Objectives: to describe the epidemiological characteristics of an outbreak of salmonellosis, analyse the mechanism of transmission and underscore the importance of health reporting.Methods: retrospective and prospective descriptive study of salmonellosis cases reported by different sources related to a school community. Analysis of variables in hospitalised patients. Epidemiological investigation and microbiological characterization.Results: there were 38 reported cases (age range, 7 months-8 years; mean, 2.7 years). They were enrolled in 2 educational centres: 57.9% attended a nursery school and the rest were students of a neighbouring school who came to the nursery for lunch or recreation activities. Twelve were hospitalised (3 hospitals). There were no serious complications. The National Microbiology Centre identified Salmonella Typhimurium 4,5,12:i:-, a monophasic variant of S. enterica, in stool cultures. The inspection showed that food was not the source of transmission, but that there was a risk of faecal-oral was not alimentary; on the other hand, there was a risk of transmission through the faecal-oral route and fomites; the physical separation between different areas was suboptimal. Proposals for improvement were made. No more cases were reported thereafter.Conclusions: the outbreak was not related to food, and its analysis allowed the implementation of measures to avoid secondary cases later on. Case reporting is considered of utmost importance to take appropriate public health measures. (AU)

SARS-CoV-2 infection. Descriptive analysis of a selected case series.

OBJECTIVES: COVID-19 was declared pandemic by March 2020. Clinical, analytical, and radiological findings have been reported. Detailed different evolution of patients of the same local outbreak has been scarcely reported. We report 6 selected cases of such an evolution. CLINICAL CASES: The clinical, radiological, analytical evolution of 6 patients is reported. Patients were selected as it were epidemiological close contacts, and showed particular different clinical evolution. RESULTS: The clinical course at the start of infection (first week) was similar among patients. In relationship with clinical evolution, middle to severe course were related with inflammation markers levels evolution (D-dimer, IL-6, ferritin, lymphocytes count, etc.). Specially lung alterations were observed, but neurological/neuropsychiatric findings are still common. In evolution, 2 patients showed middle symptoms, but the 2 most severely affected died. CONCLUSIONS: It remains to be elucidated the different evolutive pathways and outcomes of COVD-19. In our 6 patients of the same local outbreak, clinical, laboratory and radiological features were different. We discuss some aspects of the pathophysiology of the disease, other than the widely described of the respiratory system.

Infección por SARS-CoV-2. Análisis descriptivo de una serie de casos seleccionada / SARS-CoV-2 infection. Descriptive analysis of a selected case series

Objetivos: La COVID-19 fue declarada pandemia en marzo del 2020. Han sido comunicados los hallazgos clínicos, analíticos y radiológicos. Sin embargo, la diversa evolución de pacientes del mismo brote local lo ha sido escasamente. Comunicamos en este trabajo 6 casos seleccionados de tal evolución. Casos clínicos: Se expone la evolución clínica, radiológica y analítica de 6 pacientes. Estos fueron seleccionados ya que fueron epidemiológicamente contactos estrechos y mostraron una evolución clínica particularmente diferente. Resultados: El curso clínico al inicio de la infección (primera semana) fue similar entre los pacientes. En relación con la evolución clínica, un curso moderado a severo se relacionó evolutivamente con marcadores elevados de inflamación (dímero D, IL-6, ferritina, linfopenia, etc.). Fueron observadas alteraciones pulmonares típicas, pero fueron comunes también hallazgos neurológicos y neuropsiquiátricos. En la evolución 2pacientes mostraron síntomas moderados, pero los 2 más gravemente afectados murieron. Conclusiones: Está por elucidar las diferentes vías evolutivas y resultados finales de los pacientes con COVID-19. En nuestros 6 pacientes del mismo brote local, las características clínicas, de laboratorio y radiológicas fueron diferentes. Discutimos aspectos de la fisiopatología de la enfermedad distintos de los ampliamente descritos del sistema respiratorio.(AU)

Objectives: COVID-19 was declared pandemic by March 2020. Clinical, analytical, and radiological findings have been reported. Detailed different evolution of patients of the same local outbreak has been scarcely reported. We report 6 selected cases of such an evolution. Clinical cases: The clinical, radiological, analytical evolution of 6patients is reported. Patients were selected as it were epidemiological close contacts, and showed particular different clinical evolution. Results: The clinical course at the start of infection (first week) was similar among patients. In relationship with clinical evolution, middle to severe course were related with inflammation markers levels evolution (D-dimer, IL-6, ferritin, lymphocytes count, etc.). Specially lung alterations were observed, but neurological/neuropsychiatric findings are still common. In evolution, 2patients showed middle symptoms, but the 2most severely affected died. Conclusions: It remains to be elucidated the different evolutive pathways and outcomes of COVD-19. In our 6 patients of the same local outbreak, clinical, laboratory and radiological features were different. We discuss some aspects of the pathophysiology of the disease, other than the widely described of the respiratory system.(AU)

SARS-CoV-2 infection. Descriptive analysis of a selected case series. / Infección por SARS-CoV-2. Análisis descriptivo de una serie de casos seleccionada.

OBJECTIVES: COVID-19 was declared pandemic by March 2020. Clinical, analytical, and radiological findings have been reported. Detailed different evolution of patients of the same local outbreak has been scarcely reported. We report 6 selected cases of such an evolution. CLINICAL CASES: The clinical, radiological, analytical evolution of 6patients is reported. Patients were selected as it were epidemiological close contacts, and showed particular different clinical evolution. RESULTS: The clinical course at the start of infection (first week) was similar among patients. In relationship with clinical evolution, middle to severe course were related with inflammation markers levels evolution (D-dimer, IL-6, ferritin, lymphocytes count, etc.). Specially lung alterations were observed, but neurological/neuropsychiatric findings are still common. In evolution, 2patients showed middle symptoms, but the 2most severely affected died. CONCLUSIONS: It remains to be elucidated the different evolutive pathways and outcomes of COVD-19. In our 6patients of the same local outbreak, clinical, laboratory and radiological features were different. We discuss some aspects of the pathophysiology of the disease, other than the widely described of the respiratory system.

Epidemiology and clinical course of hepatitis A in Cantabria before and after the epidemic outbreak of June 2016. / Epidemiología y curso clínico de la hepatitis A en Cantabria antes y después del brote epidémico de junio 2016.

BACKGROUND AND OBJECTIVES: Since June 2016, there have been outbreaks of hepatitis A in various European countries, mainly affecting men who have sex with men (MSM). The aim of this study was to assess their clinical and epidemiological impact in Cantabria, Spain. MATERIAL AND METHODS: We retrospectively collected all cases of hepatitis A diagnosed in Cantabria between January 2013 and September 2018. We compared 2 periods: January 2013-May 2016 and June 2016-September 2018. RESULTS: A total of 156 cases were diagnosed, observing an increase in the incidence starting in October 2016. With regard to 2013-2016, we observed a higher proportion of men (50.0% vs. 84.5%; p=.012) with a predominance of the homosexual orientation (80.6%) and a higher rate of sexual transmission (0% vs. 48.3%; p=.061) for the patients in the 2016-2018 period. From the clinical standpoint, all cases of severe hepatitis occurred during this latter period. CONCLUSIONS: Our results reaffirm the high clinical and epidemiological impact of the epidemic outbreak in Cantabria and emphasizes the need for optimising the current prevention measures against hepatitis A.

El virus del Zika y determinantes sociales en un área de salud de Santiago de Cuba / Zika virus and social determinants in a health area from Santiago de Cuba

El zika es una enfermedad transmitida por el mosquito del género Aedes, identificada por vez primera en Uganda. Entre los síntomas más comunes figuran: fiebre, artralgias, sarpullido, conjuntivitis no purulenta, cefalea, mialgias y dolor ocular. Se realizó un estudio descriptivo y transversal durante 2017 de las 204 viviendas de la manzana 1204 del Policlínico Docente 30 de Noviembre de Santiago de Cuba, con el objetivo de identificar los determinantes sociales del estado de salud de la población durante el brote de trasmisión de zika. La técnica utilizada para la recolección de los datos fue la observación y como variable se analizaron los determinantes del estado de salud de la población. Se observó que el nuevo brote de zika en la manzana estudiada, surgió bajo la influencia de dichos determinantes. Se concluyó que la biología humana, el estilo de vida, el medio ambiente y la organización de los servicios de salud, influyeron directamente en la aparición de esta enfermedad.

Zika is a disease transmitted by the mosquito from Aedes gender, identified for the first time in Uganda. Among the most common symptoms there are: fever, artralgias, heat rash, non-purulent conjunctivitis, migraine, myalgias and ocular pain. A descriptive and cross-sectional study was carried out during 2017, of the 204 houses of the block 1204 from 30 de noviembre Teaching Polyclinic in Santiago de Cuba, with the objective of identifying the social determinants of the population health state during the zika outbreak transmission. The technique used for the gathering data was observation and as variable the determinant of the health state of the population were analyzed. It was observed that the new zika outbreak in the studied block, emerged under the influence of these determinants. It is concluded that the human biology, lifestyle, environment and the organization of the health services, influenced directly in the emergence of this disease.

Outbreak communication challenges when misinformation spreads on social media / Desafios da comunicação de surtos epidêmicos quando a desinformação se espalha nas redes sociais / Desafíos en la comunicación de brotes epidémicos cuando se difunde información errónea en las redes sociales

This commentary analyses the implications of social media misinformation for global health risk communication. We define misinformation, describe the pathways through which it can adversely affect responses to risk communication efforts, highlight vulnerabilities in existing interventions and present an agenda for further research to understand and address this problem.

Este artigo analisa as implicações da desinformação nas mídias sociais para a comunicação global de riscos à saúde. Definimos desinformação, descrevemos os caminhos pelos quais ela pode afetar negativamente as respostas aos esforços de comunicação de risco, destacamos as vulnerabilidades nas intervenções existentes e apresentamos uma agenda para futuras pesquisas para entender e abordar esse problema.

Este artículo analiza las implicaciones de la desinformación en las redes sociales para la comunicación de riesgos de salud global. Definimos información errónea, describimos los caminos por los cuales puede afectar de manera adversa las respuestas a los esfuerzos de comunicación de riesgos, resaltamos las vulnerabilidades en las intervenciones existentes y presentamos una agenda para futuras investigaciones para comprender y abordar este problema.

Meningitis aséptica en pacientes con parotiditis viral durante un brote epidémico / Aseptic meningitis associated to mumps during an epidemic outbreak

Resumen Comunicamos dos casos de meningitis aséptica asociadas a parotiditis viral en mujeres de edad mediana, una de ellas embarazada. Ambas se presentaron pocos días después del aumento de volumen parotídeo, con cefalea, fiebre y signos meníngeos, pleocitosis de predominio mononuclear en el LCR y resultados negativos para otras causas. La parotiditis fue confirmada por serología IgG e IgM positiva. Las pacientes tuvieron una evolución favorable con desaparición total de sus síntomas. Ambos casos ocurrieron durante un brote regional de parotiditis. La meningitis aséptica es una complicación frecuente de las parotiditis. Su diagnóstico puede lograrse por el aumento de volumen glandular precedente, la pleocitosis de predominio mononuclear en el LCR y una serología IgM e IgG positiva o detección genómica por RPC en muestra urinaria o salival. Esta complicación es más probable que sea observada durante brotes de parotiditis viral.

We report two cases of acute aseptic meningitis associated to mumps in middle-aged women, one pregnant. Both presented shortly after parotid gland enlargement. Neurological complications were suspected by headache, fever and meningeal signs and confirmed by CSF findings (mononuclear predominant pleocytosis) with negative results for alternative causes. Mumps were confirmed by positive IgM and IgG serology. Both patients were discharged with a favorable evolution and complete disappearance of symptoms. Cases were concurrent with a regional mumps outbreak. Conclusions: Aseptic meningitis is a rare mumps-associated neurological complication. Its diagnostic can be achieved by precedent parotid enlargement, mononuclear pleocytosis in the CSF and positive IgM and IgG serology or viral detection by PCR in urine or salivary samples. This complication would be more probably observed during mumps outbreaks.

Acute hepatitis due to hepatitis A virus during the 2017 epidemic expansion in Asturias. Spain. / Hepatitis aguda por virus de la hepatitis A durante la expansión epidémica de 2017 en Asturias.

INTRODUCTION: Since June 2016, there has been an increase in cases of acute hepatitis A (AHA) in several European countries, mainly affecting men who have sex with men (MSM). The aim was to know the characteristics of AHA diagnosed in recent months, comparing them with a previous series. PATIENTS AND METHODS: All cases of AHA diagnosed in adults between November 2016 and December 2017 (G-I; n=108) were prospectively collected and compared with a series also prospectively collected between January 2004 and September 2016 (G-II; n=49), analysing clinical and epidemiological characteristics. RESULTS: Compared with group II, in group I there was a greater proportion of males (95.4 vs. 81.6%; p=0.005), of MSM (63.9 vs. 22.4%; p<0.001), of cases with positive luetic serology (20.4 vs 2%; p=0.001) and of severe acute hepatitis (15 vs. 4%; p=0.043). CONCLUSIONS: AHA diagnosed in recent months in our environment mainly affect MSM and have a more serious presentation with respect to what was observed in a historical series, highlighting the need to increase the vaccination rate against the hepatitis A virus.

Genetic signatures coupled with lineage shift characterise endemic evolution of Dengue virus serotype 2 during 2015 outbreak in Delhi, India.

OBJECTIVE: In 2015, New Delhi witnessed a massive outbreak of Dengue virus (DENV) resulting in high morbidity and mortality. We report the molecular characterisation of the dominant circulating DENV strain to understand its evolution and dispersal. MATERIALS AND METHODS: DENV infections were diagnosed by detection of IgM/NS1 antigen, and serotyping was performed by C-PrM PCR. Envelope gene was amplified, and variation(s) in envelope gene were analysed. Phylogenetic tree construction, time-based phylogeny and origin of DENV were analysed. Site-specific selection pressure of envelope gene variants was analysed. RESULTS: Confirmed DENV infection was observed in 11.34% (32 of 282) cases, while PCR positivity for C-PrM region was observed in 54.16% (13 of 24) of NS1 antigen-positive cases. All samples belonged to serotype 2 and cosmopolitan genotype. Phylogenetic analysis using envelope gene revealed segregation of cosmopolitan genotype strains into specific lineages. The Indian strains clustered separately forming a distinct monophyletic lineage (lineage III) with a signature amino acid substitution viz., I162V and R288K. Selection pressure analysis revealed that 215D, 288R and 304K were positively selected sites. The rate of nucleotide substitution was 6.93 × 10-4 substitutions site-1 year-1 with time to most common ancestor was around 10 years with JX475906 (Hyderabad strain) and JN030345 (Singapore strain) as its most probable ancestor. CONCLUSION: We observed evolution of a distinct lineage of DENV-2 strains on the Indian subcontinent with possible changes in endemic circulating dengue strains that might give rise to more pathogenic strains.

A six-month Serratia marcescens outbreak in a Neonatal Intensive Care Unit.

OBJECTIVE: To investigate a Serratia marcescens (S. marcescens) outbreak in a Neonatal Unit in a tertiary university hospital. METHODS: Descriptive study of children admitted to the Unit with S. marcescens infection from November 2012 to March 2013. Conventional microbiological methods for clinical and environmental samples were used. The clonal relationship between all available isolates was established by molecular methods. A multidisciplinary team was formed, and preventive measures were taken. RESULTS: S. marcescens was isolated from 18 children. The overall attack rate was 12%, and the case fatality rate in the Intensive Care Unit was 23.5%. The most prevalent types of infections were pneumonia (6), conjunctivitis (6), and bloodstream infection (5). Clinical isolates and environmental isolates obtained from an incubator belonged to a unique clone. The clonal relationship between all S. marcescens strains helped us to identify the possible source of the outbreak. CONCLUSION: Isolation of S. marcescens from stored water in a container, and from the surface of an incubator after cleaning, suggests a possible environmental source as the outbreak origin, which has been perpetuated due to a failure of cleaning methods in the Unit. The strict hygiene and cleaning measures were the main factors that contributed to the end of the outbreak.

[Respiratory syncytial virus outbreak in a tertiary hospital Neonatal Intensive Care Unit]. / Brote por virus respiratorio sincitial en la Unidad de Neonatología de un hospital de tercer nivel.

INTRODUCTION: Investigation and control of a respiratory syncytial virus (RSV) outbreak that affected the Neonatal Intensive Care Unit (NICU) of a university hospital from October to December 2012. PATIENTS AND METHODS: Cohort study of children admitted to the NICU. The infection attack rate was calculated. A descriptive analysis of the cases and a multivariate analysis was performed using the variables that were shown to be risk factors for RSV infection. Preventive measures taken were: contact isolation; hand hygiene training and observation; exclusivity of a health team of nurses and physicians for positive cases, restrictions on visitor numbers; surveillance RSV testing, and palivizumab prophylaxis. RESULTS: The outbreak had three epidemic waves and 20 positive cases out of a total of 48 children admitted. The overall attack rate was 42%. Half of positive cases were children, with a median age of 36 days (p25=22, p75=58). The independent risk factors for RSV infection were birth weight below 1000 grams (OR=23.5; P=.002) and to have another nosocomial infection the week before the diagnosis of RSV infection (OR=19.98; P=.016). CONCLUSIONS: It was an outbreak with a high number of cases, due to the delay in notification, prolonged RSV carrier status, and low adherence to hand hygiene practice, which favoured the cross-transmission of infection. The most effective preventive measures were direct observation of hand hygiene and supervision of isolation measures.

Un brote epidémico de endocarditis por Pseudomonas aeruginosa secundario a angiografía coronaria / An outbreak of Pseudomonas aeruginosa infective endocarditis subsequent to coronary angiography

Objectives: To describe an endocarditis outbreak affecting three patients due to Pseudomonas aeruginosa infection post coronary angiography performed in the Cardiovascular Surgery and Cardiology Medical Center of a private hospital. Methods: After recognition of an infection cluster within a onemonth period, the outbreak was reported to Antalya Department of Health and a broad investigation was initiated in order to determine the most probable cause and/or source of nosocomial pseudomonal endocarditis. Patient data were obtained by medical record review as well as interviews with patients or their next of kin. Thirty-six surveillance samples for P. aeruginosa were collected from various locations within the coronary angiography unit. The outbreak research team reviewed the private hospital's Cardiovascular Surgery and Cardiology Medical Center's infection control procedures. The epidemiology of P. aeruginosa was studied through analysis of phenotypic markers, including antimicrobial sensitivity profiles. Results: The infection control audit revealed multiple breaches of infection control procedures. Only 1/36 environmental samples yielded, which was isolated from a radio-opaque solution within an angiography injector pump. P. aeruginosa from the radio-opaque solution had an identical antimicrobial susceptibility pattern to the strain isolated from patients. Both samples were susceptible to all antipseudomonal agents. This outbreak could have been successfully controlled by instituting combined infection control measures. Conclusions: This outbreak emphasizes the important of adherence to infection control standards and practices for cardiac catheterization, as well as the need for closer collaboration between the Infection Control Committee and coronary angiography personnel.

Objetivos: Describir un brote de endocarditis por Pseudomonas aeruginosa que afectó a tres pacientes tras habérseles efectuado una coronariografía en el Centro Médico de Cardiología y de Cirugía Cardiovascular (CMC-CCV) de un hospital privado. Métodos: Después de reconocer la aparición de un brote en un periodo de un mes, este hecho fue comunicado al Departamento de Salud de Antalya, iniciándose una exhaustiva investigación para precisar la más probable causa y/o fuente de las endocarditis nosocomiales. Se extrajo de los registros médicos los datos clínicos de los pacientes y se efectuaron entrevistas a los pacientes o sus familiares. Se extrajo 36 muestras medioambientales de vigilancia en busca de P. aeruginosa de diversos sitios dentro de la unidad de coronariografía. Un team que investigó el brote revisó los procedimientos en uso para la prevención de infecciones en el CMC-CCV. Se estudió la epidemiología de la P. aeruginosa mediante análisis de su fenotipos, incluyendo el perfil de susceptibilidad in vitro a antimicrobianos. Resultados: La auditoria comprobó el quiebre de diversas normas de control de infecciones. Sólo 1/36 de las muestras ambientales arrojó el cultivo de P. aeruginosa, a partir de una solución de medio radio-opaco dentro de una bomba inyectora empleada en las angiografías. Los aislados de P. aeruginosa desde la solución del medio radio-opaco tenían idéntico patrón de susceptibilidad antimicrobiana que las cepas recuperadas de los pacientes. Ambos tipos de muestras eran susceptibles a todos los antimicrobianos con actividad anti-pseudomonas. El brote pudo evitarse si se hubieran instaurado una serie de medidas de control de infecciones. Conclusiones: Este brote enfatiza la importancia de adherir a los estándares y prácticas de control de infecciones para la cateterización cardiaca, así como la necesidad de una estrecha colaboración entre el Comité de Control de Infecciones y el personal involucrado en el procedimiento de coronariografía.

Estudio de un brote de varicela en un pueblo del Uruguay / Varicella outbreak in a village in Uruguay

A varicella outbreak occurred in a Uruguayan village that introduced the varicella vaccine in 1999 with currently high vaccination rates. Aim: To investigate the cause of the outbreak, vaccine effectiveness, and to describe the measures adopted. Material and Methods: Cases that occurred in the kindergarten and schools in the village were investigated. Vaccination cards were examined, history of chickenpox and clinical characteristic of the current episode were obtained and the outcome of the measures was evaluated. An estimate was made of the vaccine's effectiveness. Results: 37 cases of varicella were reported, 14 occurring in previously vaccinated children, in a one total population of 313 children. The global effectiveness of the vaccine was 80 percent, and 100 percent for severe cases. A shift of cases towards older ages was demonstrated; vaccinated children had a trend of less fever and lower number of lesions. Immunization of healthy unvaccinated children, mainly adolescents stopped the outbreak. Comments: The vaccine proved to be highly effectiveness. In an outbreak situation, immunization policies should consider "catch up" vaccination in non-immunized adolescents without a previous history of varicella.

Un brote de varicela acaeció en un pueblo uruguayo que había introducido la vacunación anti-varicela en 1999 y tenía altas coberturas de vacunación. Objetivo: Investigar las causas del brote, la efectividad de la vacunación y evaluar las medidas adoptadas. Material y Métodos: Se investigó los casos ocurridos enjardines de infantes y colegios. Se revisó el carné de vacunación de cada niño además de averiguar por historia previa de varicela, las características clínicas de los casos y el resultado de las medidas adoptadas. Se hizo una estimación de la efectividad de la vacuna. Resultados: Se presentaron 37 casos de varicela, 14 de los cuales habían recibido la vacuna, en una población total de 313 niños. La efectividad global de la vacuna fue de 80 por ciento, y de 100 por ciento para los casos graves. Se constató un desplazamiento de la enfermedad hacia edades mayores; además, los casos en vacunados tuvieron una tendencia a presentar menos fiebre y un número menor de lesiones. La vacunación de aquellos que no habían tenido la varicela y no estaban vacunados antes, detuvo el brote epidémico. Comentarios: Se demostró la efectividad de la vacuna. La política de vacunación debiera evaluar si es necesario proceder a la vacunación "de rescate" en adolescentes no vacunados y que no exhiben el antecedente de haber padecido la varicela.