Freebase(0.00 / 0 votes)Rate this definition: Necrosis. Necrosis is a form of cell injury that results in the premature death of cells in living tissue. Necrosis is caused by factors external to the cell or tissue, such as infection, toxins, or trauma that result in the unregulated digestion of cell components.
Staph bacteria are commonly carried on the skin or in the nose of healthy people. MRSAâmethicillin-resistant Staphylococcus aureusâis a type of staph that is resistant to antibiotics called beta-lactams. In the past the majority of MRSA infections occurred among patients in hospitals or other health care settings.
Many strains of s. aureus are now resistant to the antibiotics oxacillin, penicillin and amoxicillin, and strains of the disease have begun developing resistance to newer drugs like methicillin and vancomycin, powerful drugs once considered âlast resort' antibiotics for only the most serious infections.