The aim of this study was to examine the difference in RSV small respiratory tract infections and small respiratory tract infections of other etiologies, regarding length of hospitalization and need of oxygen therapy. The examined populations were children treated for small respiratory tract infections in KBC Zemun during 2 years, aged from birth to the end of the second year of life. Treatment outcomes were examined: duration of hospitalization, length of oxygen therapy, combined pneumonia (confirmed by X-ray). A total of 78 children with a clinical picture of severe infection were selected. The data were taken from the existing documentation of KBC Zemun. The study found that in the first year a higher percentage of RSV positive girls was 76.19% than boys 73.91%, and in the second year 78.57% of RSV positive girls and 60% of boys. Children with low birth weight, premature birth as well, fed adapted formulas are more likely to develop RSV bronchiolitis. The duration of hospitalization was longer in RSV bronchiolitis, as well as in associated bacterial infection. The length of oxygen therapy was not affected by the presence of RSV infection, but children with bronchiolitis complicated by pneumonia were longer on oxygen therapy. Our research is in line with previous research, existing treatment protocols. Certain deviations can be explained by a small sample, which gives the need for systematic and broader examination of the relationship between risk factors, etiological factors in small respiratory tract infections.

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