Data/hora: 01/06/2024 02:38:39

Provedor de dados: | 55
País: | Brazil
Título: | Patterns of influenza infections among different risk groups in Brazil
Autores: | Bellei,Nancy; Carraro,Emerson; Perosa,Ana; Granato,Celso.
Data: | 2007-08-01
Ano: | 2007
Palavras-chave: | Influenza; Risk groups; Respiratory viral infection.
Resumo: | Influenza virus infections are associated with high morbidity and mortality. Influenza activity varies worldwide, and regional detection is influenced by geographic conditions, demographic and patient-risk factors. We assessed influenza activity and patterns of seasonality during three consecutive years (2001-2003) in three risk groups in São Paulo city. Four-hundred-twelve outpatients with acute respiratory infection were subjected to epidemiological, clinical and laboratory investigations; these included community population (N=140), health-care workers (N=203), and renal-transplanted patients (N=69). Nasal wash samples were tested by direct fluorescent assay for influenza, parainfluenza, adenovirus, and respiratory syncytial virus. Overall Influenza positivity was 21%, and a progressive decline was observed in all groups over time. Influenza A and B co-circulated at the same time in 2001 and 2002, but not in 2003. Low influenza-vaccination rates (19%) were reported by health-care workers. Unexpected low levels of etiological agents were detected in renal-transplanted patients, and infected cases were less symptomatic than immunocompetent patients. Based on this study, we conclude that health-care worker-immunization programs should be implemented and the clinical patterns of infected influenza patients should be used as a guide for better case-definition criteria for adequate influenza surveillance, particularly for renal-transplant patients.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000400005
Editor: | Brazilian Society of Infectious Diseases
Relação: | 10.1590/S1413-86702007000400005
Formato: | text/html
Fonte: | Brazilian Journal of Infectious Diseases  v.11 n.4 2007
Fonte: | info:eu-repo/semantics/openAccess