To investigate a high incidence of wound infections occurring in patients following cesarean section at a 650 bed charity hospital in Louisiana, a bacteriologic investigation was carried out. In this study, cultures were made at multiple sites prior to operation. An attempt was made to identify those bacteria that were predominately responsible for wound infection and their source, whether from the patient herself or from a nosocomial origin. The patients were divided into three groups depending on the degree of postoperative morbidity that followed. The bacterial flora in each group was relatively the same. Other factors were more significant in predicting those patients in whom postoperative morbidity occurred.