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.
Antibiotic Resistance Threats in the US. Antibiotics are powerful tools for fighting illness and disease, but overuse of antibiotics has helped create bacteria that are outliving the drugs used to treat them. Antibiotic resistance is a quickly growing, extremely dangerous problem. World health leaders have described antibiotic-resistant bacteria as nightmare bacteria that pose a catastrophic threat to people in every country in the world.