: Infection acquired in the hospital (nosocomial infection) is defined as an infection that does not exist or is in the incubation period at the time of hospital admission and is associated with health care. Nosocomial infection occurs as a result of interaction of several factors, among others, the types of microbes in the hospital environment, nursing actions that allow microbial intervention into the body through the skin and mucous membranes, interactions among patients, hospital workers, equipment and the environment as well as an increase of opportunistic microbial resistance. This study aimed to determine the pattern of aerobic bacteria that were potential to cause nosocomial infections in the delivery room of Prof. Dr. R. D. Kandou Hospital Manado. This was a prospective descriptive study. Samples were obtained from walls, floors, medical equipment, and the air in the delivery room at Prof. Dr. R. D. Kandou Manado. The results showed that of 22 samples, there were several types of bacteria as follows: Bacillus subtillis (40.1%), Enterobacter aerogenes (18.2%), Gram-negative cocci (18.2%), Serratia liquefaciens (13.6%), and Enterobacter cloacae (9.9%). Conclusion: The most common type of aerobic bacteria in the delivery room of Prof. Dr. R. D. Kandou Hospital Manado was Bacillus subtillis.
Keywords: delivery room, nosocomial infections, aerobic bacteri