Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most successful modern pathogens. The same organism that lives as a commensal and is transmitted in both health-care and community settings is also a leading cause of bacteraemia, ... Methicillin-resistant Staphylococcus aureus, commonly known as MRSA, represents a formidable challenge in the world of infectious diseases due to its resistance to numerous antibiotics. Methicillin-resistant Staphylococcus aureus (MRSA) is a type of infection-causing bacterium that is resistant to the antibiotic methicillin. Key points MRSA is a type of bacteria that is resistant to several antibiotics. Although anyone can get MRSA, some groups have a higher risk. If left untreated, MRSA infections can cause sepsis or death.