Özet:

Objectives: We aimed to detect the viral etiology of upper respiratory tract infections in children and the range of agents through years. Methods: This was a prospective clinical study done in Istanbul Unıversty, Faculty of Medicine. We studied with 380 children with upper respiratory tract infection whose ages were between 1 and 180 months and applied our department of pediatrics in 2006- 2008. After the clinical findings of the cases have been recorded nasal smear sampling was done and in 380 sample we search for influenza A-B and Respiratory syncytial viruses. Results: We isolated virus in 23.1 % percent of nasal smear samples. The most frequent viruses were found as influenza A 62.5 % and respiratory syncytial virus 28.4 % . Influenza A was the most common agent in all age groups. The isolation rate of influenza A was increased as the children get older We isolated influenza A virus in 51.5 % of 0-24 months oldchildren, 50 % of 2-5 years old children and 78.1 % of children older than 5 years . Conclusion: The viral etiology rate of upper respiratory tract infections in children is 23.1 % and the most common agent is influenza A.

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