[Results of serologic surveys of children with acute stenosing laryngotracheobronchitis].

The materials of serologic surveys of 269 children with acute stenosing laryngotracheobronchitis hospitalized in Children's Infectious Hospital No. 3, Leningrad, are presented. Acute stenosing laryngotracheobronchitis developed most frequently against the background of low titres of antibody to viruses of the respiratory group. Severe cases of the disease were caused by influenza A2 virus, milder cases by influenza B, parainfluenza, respiratory syncytial and adenoviruses.