| role of viruses and atypical bacteria in exacerbations of asthma in hospitalized children: a prospective study in the nord-pas de calais region (france). | we studied the role of viruses and atypical bacteria in children hospitalized with exacerbated asthma by a prospective study of children with acute asthma admitted to the department of pediatrics in lille, and to 15 hospitals in the nord-pas de calais region, from october 1, 1998-june 30, 1999. we included children aged 2-16 years with active asthma, defined as three or more recurrent episodes of reversible wheezing. the severity of asthma and of asthmatic exacerbations was recorded. immunofluor ... | 2003 | 12526066 |