MSSA. Methicillin-Sensitive Staph Aureus is a common type of Staph that is vulnerable to the methicillin class of antibiotics and therefore easier to treat. This “common Staph” infection is often seen on bacterial culture test results.
VRSA. Short for Vancomycin-Resistant Staph Aureus, this rare type of Staph has become immune to a common “last resort” antibiotic called vancomycin.
VISA. Vancomycin-Intermediate Staph Aureus is similar to VRSA, but the bacteria are only partially resistant to the vancomycin.
ORSA. Another name for MRSA, Oxacillin-Resistant Staph aureus, as the name suggests, is resistant to Oxacillin, an antibiotic of the same class as methicillin.
CA-MRSA. These are strains of MRSA found in community and public places. These strains tend to cause skin infections and are often easier to treat with antibiotics. However, CA-MRSA often strikes young and otherwise healthy people and can be deadly in some cases.
HA-MRSA. These are strains of MRSA found in hospitals and other healthcare settings. As you’ll see further below, MRSA first got started in hospitals. Healthcare-associated MRSA often causes internal infections and can be more challenging to treat.
LA-MRSA. There are strains of MRSA associated with livestock and feed animals. These strains have also be found on livestock caretakers. Livestock-associated MRSA is a new area of study. MRSA has also been found in our food supply: conventionally raised pork, beef and chicken.