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.
Some of these antibiotics target bacterial ribosomes and are used in treating respiratory infections, including Legionnaires' disease (tetracycline, erythromycin). Vancomycin attacks bacterial cell walls and deadly organisms such as MRSA (methicillin-resistant Staphylococcus aureus) (multiply drug resistant staph).