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.
Bacteria and Drug Resistance. Bacteria live in our bodies and in our environment, usually without causing any illness. When bacteria do make us sick, antibiotics are usually available to treat the illness. However, over time, bacteria develop resistance to some types of antibiotics. This means that the drugs are no longer effective at killing the bacteria and the infections become harder to treat. If bacteria are resistant to more than one type of antibiotic, they are called multidrug-resistant organisms, or MDROs.