[Chlamydia trachomatis pneumopathies in infants].

The systematic serological examination of 174 infants aged between 0 and 12 months in a paediatric pneumology unit over a period of 12 months revealed that 59 infants (33%) had antibodies and that at least 15 (8.6%) were infected. Based on the experience gained in this department and on data from the literature, the authors recall the clinical and laboratory features of Chlamydia trachomatis interstitial pneumonia in infants, its treatment, pathophysiology and epidemiology.