The aim of the present study was to realize, in a large day care cente
r (DCC) housing 93 infants aged 3 to 36 months, a survey of the freque
ncy of bronchiolitis (BO) and the associated risk factors : home smoki
ng, familial atopy and pets at home. BO is frequent before 2 years of
age : 20 among 61 (32,8%), 6 of whom (33%) developed BO less than 3 mo
nths following admission, 6 of 20 developed BO before 6 months of age
(33%). Because of the frequency and precocity of the BO in infants adm
itted in DCC, prophylactic measures have been recommended : staff hand
washing, counter desinfection, no admission of infants before 6 month
s of age from september to january, specially if parents have asthma.
Home smoking is mainly responsible for recurrence of BO.