The interaction between patients with acute myocardial infarction and atherosclerosis and antibodies against to Chlamydia pneumoniae have been determined by seroepidemiological studies. In recent years, the presence of C.pneumoniae in atherom plaques at coroner arthers has been shown.

C.pneumoniae IgG antibodies were detected by the ELISA method in the sera of ? ?. On the other hand, by giving a questionnaire to the subjects, about life styles and habits of the subjects C.pneumoniae. According to the results, 39 patients (78%) were positive, 11 (22%) were negative, while 16 of the control subjects (53%) were positive, and 14 of them (47%) negative. The difference between the control group and the patients was statistically significant (p<0.05).