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Background: S. aureus is the most common bacteria associated with both community and hospital associated infections. It is associated with skin and wound infection, pneumonia, endocarditis, septic arthritis, osteomyelitis. Objectives: The present study aimed to estimate the prevalence of infectious disease caused by Methicillin sensitive Staphylococcus aureus among community and hospital acquired infections in Khartoum State, Sudan. Methods: A cross-sectional laboratory-based study was conducted during the period from November 2020 to January 2021. To isolate and identify S. aureus, the conventional method and protein A latex test were used. All isolated organisms were tested for their in-vitro antimicrobial susceptibility against methicillin (MET 5μg) disc using the Kirby-Baur disk diffusion method to detect MSSA. Result: The result showed a high frequency of community infection (80%). The majority of the isolates were isolated from patients with respiratory tract infection (28.7%), and the result showed that RTI more common on community infection (33.7%). Conclusion: The present study concluded that male more infected by MSSA and the highest frequency of isolates was in the age group more than 45 years. The present study highlighted that RTI is predominantly the site of infection by MSSA. The present study showed that RTI more common on community infection.

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