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Title: [Monitoring of activity of influenza in Santa Fe, Argentina, 2005-2010]
Authors: Kusznierz, Gabriela F. 
Cociglio, Raquel 
Beltramino, Juan C 
Pierini, Judith 
De Jorge, José 
Gómez, Alejandra 
Pigliacampo, Gerardo 
Carrasco, Elsa 
Cesoni, Adriana 
Imaz, Susana 
Issue Date: Apr-2014
Journal: Revista chilena de infectologia : organo oficial de la Sociedad Chilena de Infectologia 
BACKGROUND: Influenza viruses have a relevant public health impact.
OBJECTIVE: To describe the activity of influenza and assess the morbidity and mortality impact during 2005 to 2010 in Santa Fe, Argentina.
METHODS: Epidemiological and virological indicators were calculated based on sentinel surveillance. Mortality data from patients over and under the age of 65 were analyzed using the integrated autoregressive moving average model and an excess of mortality attributable to influenza was determined.
RESULTS: The viral circulation effect on morbidity was measured through the evolution in the proportion of influenza-like illness (ILI) patients. Peak incidence was observed between weeks 23 and 33. An excess of deaths was identified in 2007 among patients over 65 and among those under 65 in 2009, which was related with influenza A(H3N2) and A(H1N1)pandemic virus circulation respectively, associated with a higher proportion of virus recovery and a higher ILI percentage.
CONCLUSIONS: The sentinel surveillance of influenza is a simple and efficient methodology that identifies influenza trends. Our study showed that the virus has caused a rise of mortality in patients > 65 in epidemic periods associated with the H3N2 subtype and in patients < 65 in the pandemic period with the circulation ofA(HIN1)pandemic virus.
ISSN: 0716-1018
DOI: 10.4067/S0716-10182014000200003
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