Características clínicas de pacientes pediátricos internados por Influenza A: comparación de dos subtipos virales (H1N1) y (H3N2) / Clinical characteristics of pediatric patients hospitalized due to Influenza A: comparison of two viral subtypes (H1N1 and H3N2)

Influenza is a respiratory disease ocasionated by influenza virus A and B. Is a disease with high morbi-mortality world-wide. Influenza produces an acute febrile respiratory illness with cough, headache and myalgias for 3-4 days, with simptoms that may persist for as long as 2 weeks. There are three types of influenza virsuses: A, B and C, of whom the type a has a higher ability to originate pandemias and is subclassified according to their surface antigens: hemaglutinine (H) and neuraminidase (N). Of the capacity of mutation that has the influenza virus and the consequent expression of different proteins, can modify its virulence. The transmission route is through direct contact with secretetory repirations. The transmission route is through direct contact with secretetory repirations. The incubation period is scant, between 12-72 hs. The aim of this study was to compare the clinical characteristics demographicals and evolutive of pediatric patients hospitalized because by Influenze A: subtypes H1N1 (pdm2009) and H3N2. An observative study was performed, retrospective, using data of hospitalizations of children during the years 2016 and 2017 with influenza A confirmed by laboratory. The study also, aimed to evaluate if the viral subtype constitutes a factor of risk, independent for complicated hospitalization (admission to intensive care and/or development of complications) in hospitalized children. The results obtained in the study are detailed in the paper. In conclusion, both viral subtypes affected mainly to children with risk factors. The viral subtype H1N1 was related with higher severety in hospitalized children. is of most importance to perform preventive works, specially in vulnerable groups, offering a good cover of immunizations. The clinical parameters arae commented (AU)

Influenza: evolución a cuatro años de la pandemia: Hospital Nacional Profesor Alejandro Posadas, Argentina / Influenza: A four-year evolution of the pandemic: Prof. Alejandro Posadas National Hospital, Argentina

En el Hospital Nacional Profesor Alejandro Posadas se estudiaron la incidencia de influenza, las características de casos y tipos y subtipos de virus circulantes de enero a agosto de 2013 inclusive, semanas epidemiológicas (SE) 1-35, y se compararon con los años 2009-2012. De fin de mayo a agosto inclusive de 2013 (SE 18 a 35) se observó un aumento del porcentaje de consulta por enfermedades respiratorias, enfermedad tipo influenza e internación por neumonía y se diagnosticaron 207 casos: 153 influenza A (FLU-A)(H1N1pdm09), 46 A(H3), ocho A(sin subtipificar). La mayor frecuencia fue en menores de 5 años, seguida por el grupo de 60 a 64.La chance de tener la enfermedad fue tres veces mayor en el grupo de 40-64 años versus 15-39 o > 64 años. La letalidad, que aumentó con la edad, fue de 7.2% y la chance de morir fue seis veces mayor en los > 64 años. El porcentaje de vacunación entre los casos fue11.6%. Ninguno de los fallecidos estaba vacunado. Luego de la pandemia de 2009 el porcentaje de consultas anuales disminuyó hasta 2012, con un aumento en el período invernal de 2013 de 52.0% con respecto a 2012. La circulación viral en 2013 fue más temprana que en los años anteriores. En 2009 y 2013 la mayor circulación fue FLU-A (H1N1pdm), en 2011 FLU-A(H3) y en 2010 y 2012 FLU-A(H3) y FLU-B.(AU)

As from January to August 2013, epidemiological weeks 1-35 (EW), Influenza incidence, case characteristics, types and subtypes of circulating influenza virus in the Nacional Profesor Alejandro Posadas Hospital were studied, and were compared to incidences during 2009-2012. From late May to the end of August 2013 (EW18-35), an increase was observed in the proportion of patients visits for respiratory disease, influenza-like illness and hospitalizations due to pneumonia; of 207 cases diagnosed with influenza A virus, 153 were infected by H1N1pdm09, 46 by H3, and eight without subtype. The highest proportion of cases was found in children under five years of age, followed by the group 60-64.The chances of having the illness were three times greater among the group 40-64 years old compared to 15-39 or those older than 64. Mortality, which increased with age, was 7.2%, and the odds of death were six times higher among those older than 64. Vaccination rate among the cases was 11.6%. None of the fatal cases had received the vaccine. After the 2009 pandemic, the proportions of annual patients´ visits decreased until 2012; in 2013, an increase of 52.0% during the winter period compared to 2012. The viral circulation started earlier in 2013 compared to previous years. FLU-A(H1N1pdm) was the predominant circulating virus in 2009 and 2013, FLU-A(H3) in 2011, FLU-A(H3) and FLU-B in both 2010 and 2012.(AU)

Profilaxis de la toxoplasmosis prenatal / Prophylaxis of prenatal toxoplasmosis

La toxoplasmosis prenatal está vinculada sólo a la primoinfección materna acaecida en el embarazo. A fin de detectar precozmente a estas mujeres e implementar el tratamiento se efectua el "screening" serológico sistemático durante la gesta. Así pues, fue estudiada retrospectivamente una población de 3049 embarazadas, habitantes del Gran Buenos Aires, controladas en nuestro servicio desde el 05/92 al 03/94 con el objeto de: a) estabelecer seroprevalencia de la infección y b) evaluar la eficiencia de nuestro protocolo de control. Se empleó inmunofluorescencia indirecta para dosar los anticuerpos específicos y ELISA para la detección de IgM específica. La seroprevalencia global hallada fue del 58,9 por ciento con un 41,1 por ciento de mujeres seronegativas y por lo tanto susceptibles de primoinfección. La prevalÛncia por grupos de edad fue: menores de 19 años: 58,8 por ciento, 20-29 años: 56,9 por ciento, 30-39 años: 64,2 por ciento. El 8,5 por ciento de la población total presentó títulos altos en su primer control, de las cuales, el 55 por ciento fueron corectamente recontroladas seg³n nuestro protocolo, hallándose dos primoinfecciones. En cambio, sólo el 5 por ciento de las que fueron negativas en su primer control, fueron debidamente recontroladas durante la gesta. Se concluye que a) el grupo de susceptibles es grande reafirmando la necesidad del control serológico; b) la detección de IgM específica resultó de suma utilidad pues en la mayoría de los casos evitó la toma de una segunda muestra; c) el control de las negativas fue pobre indicando un subregistro de primoinfecciones. (AU)

Influenza: evolución a cuatro años de la pandemia. Hospital Nacional Profesor Alejandro Posadas, Argentina. / [Influenza: a four-year evolution of the pandemic. Prof. Alejandro Posadas National Hospital, Argentina].

As from January to August 2013, epidemiological weeks 1-35 (EW), Influenza incidence, case characteristics, types and subtypes of circulating influenza virus in the Nacional Profesor Alejandro Posadas Hospital were studied, and were compared to incidences during 2009-2012. From late May to the end of August 2013 (EW18-35), an increase was observed in the proportion of patients visits for respiratory disease, influenza-like illness and hospitalizations due to pneumonia; of 207 cases diagnosed with influenza A virus, 153 were infected by H1N1pdm09, 46 by H3, and eight without subtype. The highest proportion of cases was found in children under five years of age, followed by the group 60-64. The chances of having the illness were three times greater among the group 40-64 years old compared to 15-39 or those older than 64. Mortality, which increased with age, was 7.2

, and the odds of death were six times higher among those older than 64. Vaccination rate among the cases was 11.6

. None of the fatal cases had received the vaccine. After the 2009 pandemic, the proportions of annual patients visits decreased until 2012; in 2013, an increase of 52.0

during the winter period compared to 2012. The viral circulation started earlier in 2013 compared to previous years. FLU-A(H1N1pdm) was the predominant circulating virus in 2009 and 2013, FLU-A(H3) in 2011, FLU-A(H3) and FLU-B in both 2010 and 2012.