Cardiac surgery is a high risk for infection, someone on the heart bypass machine, has his or her chest opened heart exposed to air, infections can be devasting. Cardiac surgery is a non contaminated clean surgery. However, patient in the early post operative period are highly susceptible for infection, witch will affect both early & late morbidity & mortality. Several risk factors will contribute to infection, the patient medical condition, use of multiple invasive devices (indwelling catheters and chest tubes), the immunologic consequence of the cardiopulmonary bypass & risk of infection from intubation. The most common infections are: septicemia, respiratory tract infection, operative site infection and urinary tract infections.