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.
Gram-negative bacteria and mycobacteria are innately resistant to several antibiotics (such as macrolides) because their outer membrane restricts the influx of these drugs (Fig. 5a). Resistance to all major classes of ribosome-targeting antibiotics is also conferred to some extent by efflux in all bacteria (Fig. 5b).vercoming bacterial resistance. The global rise of multidrug-resistant bacteria, coupled with the paucity of novel antibiotics in the development pipeline, represents a major public health concern. Several strategies are underway to develop improved and novel antimicrobial agents.