MRSA stands for methicillin-resistant Staphylococcus aureus. It is one of many strains of a bacterium called Staphylococcus aureus -- or staph, for short. Staph bacteria are common on skin and in noses. There has been a big increase in antibiotic-resistant bacteria such as MRSA, even in children. It's important to know how to help prevent MRSA in children and what to do if you suspect your child has it. Follow the links below to find WebMD's comprehensive coverage about how MRSA is contracted, what it looks like, how to treat it, and much more.