Sentinel surveillance of influenza and other respiratory viruses, Brazil, 2000–2010

摘要: There are scanty data on the epidemiology of influenza and other respiratory viruses in South America Brazil. The aim this study was to summarize from Brazilian surveillance system discuss patterns viral circulation. is based detecting cases influenza-like illness sentinel sites weekly collection five nasopharyngeal secretions samples, which processed state public health laboratories for by indirect immunofluorescence assay. Data 2000 2010 were described over time, region, gender, age group, an analysis Spearman correlation performed between monthly detection rainfall temperature two capitals with highest number positive one northeast region (Maceio) southern (Curitiba). 3,291,946 visits illness; these, 37,120 had samples collected 6421 tested positive: 1690 (26%) A, 567 (9%) B, 277 (4%) parainfluenza 1, 571 2, 589 3, 742 (12%) adenovirus, 1985 (31%) syncytial virus. Overall, increased activity virus observed March June, preceding peak activity, May August, but regional differences. In Maceio, there a weak (ρ = 0.05), moderate 0.36). Curitiba, high decrease increase -0.83 -0.78 respectively). These important guide control measures as best time vaccination use antivirals.