Longitudinal study of acute respiratory diseases in Rio de Janeiro: occurrence of respiratory viruses during four consecutive years

Revista do Instituto de Medicina Tropical de São Paulo

Jussara P. Nascimento²  Marilda M. Siqueira²  Frits Sutmoller²  Murilo M. Krawczuk²  Vivian De Farias²  Vanja Ferreira²  Maria José Rodrigues¹ 

[1] ,Fundação Oswaldo Cruz Departamento de Virologia Rio de Janeiro RJ ,Brazil

关键词: Respiratory syncytial virus;    Adenovirus;    Influenza virus;    Parainfluenza virus;    Enterovirus;    Epidemiology;   

DOI  :  10.1590/S0036-46651991000400008

来源: SciELO

【 摘 要 】

The occurrence of different viruses in nasopharyngeal secretions from children less than 5 years old with acute respiratory infections (ARI) was investigated over a period of 4 years (1982-1985) in Rio de Janeiro. Of the viruses known to be associated with ARI, all but influenza C and parainfluenza types 1, 2 and 4 were found. Viruses were found more frequently in children attending emergency or pediatric wards than in outpatients. This was clearly related to the high incidence of respiratory syncytial virus (RSV) in the more severe cases of ARI. RSV positive specimens appeared mainly during the fall, over four consecutive years, showing a clear seasonal ocurrence of this virus. Emergency wards provide the best source of data for RSV surveillance, showing sharp increase in the number of positive cases coinciding with increased incidence of ARI cases. Adenovirus were the second most frequent viruses isolated and among these serotypes 1,2 and 7 were predominant. Influenza virus and parainfluenza virus type 3 were next in frequency. Influenza A virus were isolated with equal frequency in outpatient departments, emergency and pediatric wards. Influenza B was more frequent among outpatients. Parainfluenza type 3 caused outbreaks in the shanty town population annually during the late winter or spring and were isolated mainly from outpatients. Herpesvirus, enterovi-rus and rhinovirus were found less frequently. Other viruses than RSV and parainfluenza type 3 did not show a clear seasonal incidence.

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