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Mortalidad asociada con las temporadas de mayor circulación de los virus de la influenza en Bogotá, Colombia, 1997-2005

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Date
2009
Author
Porras Ramírez, Alexandra
Rico Mendoza, Alejandro
Moreno Montoya, José
Cótes, Karol
López, Juan Diego
Herrera, Diana
Rey, Gloria
de la Hoz, Fernando
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Abstract
OBJETIVO: Estimar el exceso de mortalidad potencialmente atribuible a los virus de la influenza A y B y al virus sincitial respiratorio humano (VSRH) en las temporadas de mayor circulación de los virus de la influenza en Bogotá, Colombia entre 1997 y 2005. MÉTODOS: Se relacionaron las tasas mensuales de mortalidad general, por neumonía en menores de 5 años y por neumonía y afecciones cardiovasculares en mayores de 60 años, en Bogotá, Colombia, con las temporadas de mayor circulación de los virus de la influenza en esa ciudad. Los datos de mortalidad se obtuvieron del Departamento Nacional de Estadísticas de Colombia; las temporadas de mayor circulación de los virus se definieron como los meses contiguos en los que el número de aislamientos era igual o superior a la mitad del total de los aislamientos del año. Se calcularon las razones de tasas de incidencia (RTI) y sus intervalos de confianza de 95 por ciento (IC95 por ciento). RESULTADOS: El virus de la influenza A mostró un patrón de circulación estacional, pero no el de la influenza B y el VSRH. La mayor circulación de los virus de la influenza se asoció con un incremento promedio anual de 5 por ciento en la mortalidad general durante el período estudiado (RTI = 1,05; IC95 por ciento: 1,046 a 1,064). En las temporadas de mayor circulación de los virus de la influenza, la mortalidad combinada por neumonía e influenza en todas las edades fue mayor en 11 por ciento que en el resto del período (RTI = 1,11; IC95 por ciento: 1,051 a 1,178). CONCLUSIONES: En las temporadas de mayor circulación de los virus de la influenza en Colombia puede aumentar la mortalidad, en particular por neumonía y afecciones cardiovasculares en mayores de 60 años. Deben emprenderse acciones de prevención específicas para prevenir la influenza, especialmente en estos dos grupos de edad.(AU)
 
OBJECTIVE: To estimate potential excess mortality attributable to influenza viruses A and B and human respiratory syncytial virus (HRSV) during peak seasons of influenza virus circulation in Colombia from 1997 to 2005. METHODS: A comparison of monthly, general mortality rates from pneumonia in children under 5 years of age and from pneumonia and cardiovascular disease in those more than 60 years of age in Bogota, Colombia, were compared to the city's peak seasons of influenza virus circulation. Mortality data were obtained from the National Bureau of Statistics of Colombia; peak seasons of virus circulation were defined as contiguous months in which the number of isolates was equal to or greater than half the total number of isolates for the year. Incidence rate ratios (IRR) and their 95 percent confidence intervals (95 percentCI) were determined. RESULTS: Influenza A demonstrated a pattern of seasonal circulation, but influenza B and HRSV did not. The increased circulation of influenza virus was associated with an average annual increase of 5 percent in overall mortality during the study period (IRR = 1.05; 95 percentCI: 1.046-1.064). During seasons of increased circulation of influenza viruses, the combined mortality from pneumonia and influenza for all ages was 11 percent higher than it was at other times (IRR = 1.11; 95 percentCI: 1.051-1.178). CONCLUSIONS: During peak seasons of influenza virus circulation in Colombia, there can be increased mortality, particularly from pneumonia and cardiovascular disease among those more than 60 years of age. Preventive actions specific to protecting against influenza should be taken, especially in these two age groups.(AU)
 
Series
Rev Panam Salud Publica;26(5),nov. 2009
Subject
Virus de la Influenza A; Virus de la influenza B; Virus Sincitial Respiratorio Humano; Variaciones Estacionales; Colombia; Influenzavirus A; Influenza B virus; Respiratory syncytial virus, human; Seasonal variations; Colombia; Influenza Humana; Colômbia; Estações do Ano; Fatores de Tempo; Saúde da População Urbana; Adulto Jovem
URI
http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892009001100008
https://iris.paho.org/handle/10665.2/9746
Citation
Porras Ramírez, Alexandra,Rico Mendoza, Alejandro,Moreno Montoya, José,Cótes, Karol,López, Juan Diego,Herrera, Diana,Rey, Gloria,de la Hoz, Fernando (2009) Mortalidad asociada con las temporadas de mayor circulación de los virus de la influenza en Bogotá, Colombia, 1997-2005. Rev Panam Salud Publica;26(5) 435-439,nov. 2009. Retrieved from http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892009001100008
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