Epidemiological Alert, Update on Influenza in the Americas, SARS and 3rd Biannual Meeting of Subregional Emerging-Disease Surveillance Networks (6 November 2003)
Alerta Epidemiológica, Actualización sobre Influenza en las Américas, SARS and 3a. Reunión Bianual de Redes Subregionales de Enfermedades Emergentes (6 noviembre 2003)
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For this week, WHO and the US National Respiratory and Enteric Virus Surveillance System (NREVSS) collaborating laboratories examined 707 samples to detect influenza virus, of which 48 (6.8%) came out positive. Of these positive samples, the Influenza A Subtype H3N2 virus was identified in 32 of them; unsubtyped Influenza A, in 15; and Influenza B, in 1. Since 28 September, a total of 3,115 samples have been examined, with 121 of them (3.9%) positive. Of the 121 viruses identified, 119 (98%) were Influenza A, of which 47 (39%) were subtyped as H3N3; and 2 (2%) were Influenza B. Of the isolates, 110 (91%) came from the West South Central region. Esta semana los laboratorios colaboradores de la Organización Mundial de la Salud (OMS) y los laboratorios del Sistema Nacional de Vigilancia de Virus Respiratorios y Entéricos de los EUA (SNVVRE) examinaron 707 muestras para la detección del virus de la influenza. Se identificó el virus en 48 (6,8%) de las muestras (32 con virus de Influenza tipo A subtipo H3N2, 15 con Influenza A sin subtipo identificado, y 1 con Influenza B). Desde el 28 de septiembre, se han examinado un total de 3.115 muestras, de las cuales 121 (3.9%) fueron positivas. En 119 de éstas (98%) se identificó Influenza A, entre las cuales 47 correspondían al Influenza A subtipo H3N2; y en 2, Influenza B. La mayoría (91%) de las muestras positivas procedían de la región central suroeste.
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