Abstract: Respiratory Syncytial Virus Bronchiolitis is Associated with Thrombocytosis in Hospitalized Infants Lijiao,Zou yingxue,Ren lixin.Tianjin Children's Hospital.Tianjin,China,300074. Abstract Objectives: To assess the rate of thrombocytosis in hospitalized infants with bronchiolitis and to investigate its potential role as an early marker of respiratory syncytial virus infection. Methods: Clinical data on 490 infants aged 2~24 months who were hospitalized for bronchiolitis were collected prospectively and compared between RSV-positive and RSV-negative infants. Results: The rate of thrombocytosis was significantly higher in RSV-positive than RSV-negative infants (40.0% vs 24.5%, P＜0.05). There was no significant difference in mean platelet count between the two groups. Conclusions: RSV-positive bronchiolitis in hospitalized young infants is associated with thrombocytosis.

Key words: Respiratory Syncytial Virus, Bronchiolitis, Thrombocytosis, Infants