ABSTRACT
Eighty male patients were selected for this study. Forty of them were diagnosed as having coronary artery disease [CAD] as documented by coronary angiography the remaining 40 patients were confirmed to have acute myocardial infarction. Twenty control healthy persons were included in the study. All sujects were studied by history, clinical examination and investigated for blood sugar, liver and renal function, lipid profile, plasma fibrinogen and chlamydia pneumoniae IgM and IgG. The results showed that C. pneumoniae IgG was statistically significantly higher in patients than control. On the other h and the distribution of IgM in studied cases was 10% in infarction cases and 2.5% in angina cases which are all non significant. As regard patients with other risk factors for coronary heart disease [CHD] in this study as diabetes mellitus, hypertension or high blood lipids, we found that there is no correlation with IgG sero positivity to C. pneumoniae in either angina or infarction groups