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What is the difference between community-associated MRSA and health care-associated MRSA?

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The primary difference between community-associated MRSA (CA-MRSA) and health care-associated MRSA (HA-MRSA) lies in the setting where the infection is acquired and the populations typically affected.1

Community-Associated MRSA (CA-MRSA)

CA-MRSA affects healthy individuals who have not been hospitalized for at least one year. It is often responsible for soft-tissue infections, such as skin boils and abscesses, but can also lead to severe conditions like necrotizing fasciitis, sepsis syndrome, and pneumonia.1

Health Care-Associated MRSA (HA-MRSA)

HA-MRSA occurs in nosocomial settings, such as hospitals, nursing homes, and dialysis facilities. It frequently causes infections in surgical incisions, blood infections, and pneumonia. Individuals who are ill, very young, or elderly are particularly susceptible to this type of infection.1

Both forms of MRSA are strains of Staphylococcus aureus that are resistant to methicillin and related penicillins, and both can be transmitted through skin contact. Because these bacteria are resistant to many antibiotics, preventing their spread through improved sterilization and appropriate antibiotic use is essential for public health.1