Coronary Atherosclerosis has a complicated etiology that is affected by risk factors such as hereditary and environmental variables. Chronic infection and inflammation have been identified as pathogenic factors for developing Coronary Artery Disease (CA). This study aimed to identify the bacterial species that could contribute to the occurrence of atherosclerosis in patients who underwent cardiac catheterization of the coronary arteries in the period from 11/28/2022 to 4/15/2023 from the Mosul Center for Cardiology. and Cardiac Surgery (MCCCS).

Balloon samples were transferred by Tryptone Soy Broth transport medium directly to the laboratory, inoculated on primary isolation media (nutrient agar, blood agar, and MacConkey agar), and incubated at 37 °C for 24 hours in aerobic condition. This study showed that from 100 balloon samples isolating different species of bacteria, 21 positive samples were obtained, and They represented 15 types, according to the Vitek-2 compact system diagnosis. Isolating mixed types of bacteria from atherosclerotic patients is an essential step in understanding the potential role of bacterial infections in atherosclerosis, and can investigate whether these bacteria promote inflammation, interact with lipids, or trigger immune responses, all of which could play a role in the development and progression of atherosclerosis. In conclusion, it was found that many types of bacteria can be isolated from atherosclerosis, and it is believed that the different isolated species are associated with different risk factors that differ according to the patient, immunity, genetic predisposition, and other environmental conditions surrounding him.