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.
There are many types of antibiotics, and there are many types of bacteria. Some bacteria are naturally resistant to certain antibiotics. Depending on the type of bacteria, different types of antibiotics are more (and less) effective.Antibiotic resistance refers to a situation where a bacteria becomes less sensitive to a particular antibiotic (or class of antibiotics).here are many types of antibiotics, and there are many types of bacteria. Some bacteria are naturally resistant to certain antibiotics. Depending on the type of bacteria, different types of antibiotics are more (and less) effective.