High HDL cholesterol has been associated with a reduced risk for heart attack, but how it actually reduced the risk remained unclear. It turns out that some mechanisms that raise HDL do not seem to lower the risk of heart attack.
MRSA (methicillin resistant staphylococcus aureus) is a type of staphylococcus bacteria (staph) that is resistant to beta-lactam antibiotics. MRSA is contagious and can cause life-threatening infection. MRSA isnât found in the natural environment (soil or water).
Definition of Staphylococcal infection. 1  Take the MRSA Quiz!  Staphylococcal infection: Infection with one of the Staphylococcal bacteria. Staph infection can cause pus-filled abscesses on the skin or internal organs, and can migrate through the blood to infect the heart, brain, and other areas. Treatment is with antibiotics and drainage of abscesses as needed. A particularly dangerous form of this infection is methicillin-resistant Staphylococcus aureus, commonly referred to as MRSA. See also Staphylococcal scalded skin syndrome (SSSS), Staphylococcus.