[Etiologic profile of viral respiratory infections in small children during epidemic periods 1990-91 and 1991-92].

In periods from October 1990 to June 1991 and from September 1991 to June 1992, 551 hospitalized infants and small children were examined by immunofluorescence method for respiratory viruses. In 264 (47.9%) cases viral etiology was established. Like in previous seasons the infections of RS and parainfluenza type 3 viruses dominated. Infections of RS virus were not frequent, and of parainfluenza type 3 virus less than in previous seasons. The increase of percent of infections due to parainfluenza type 2 and 4 viruses were observed.