[Serologic examination of patients with prolonged cough in anamnesis].

Serological examinations of patients with prolonged cough in history, made at an allergy center, revealed, in 56% of them, IgG to antigens of Chlamydia pneumoniae and C. psittaci; antibodies to M. pneumonie were detected in 25% of them. It is expedient to diagnose serologically opportunistic infections in order to prevent chronic disease forms and further allergization.