Hi, I have noticed a few people asking me what MRSA is and I finally know. What is Staphylococcus aureus?Staphylococcus aureus, often referred to simply as "staph," are bacteria commonly carried on the skin or in the nose of healthy people. Occasionally, staph can cause an infection; staph bacteria are one of the most common causes of skin infections in the United States. Most of these infections are minor (such as pimples and boils) and most can be treated without antibiotics (also known as antimicrobials or antibacterials). However, staph bacteria can also cause serious infections (such as surgical wound infections and pneumonia). In the past, most serious staph bacteria infections were treated with a certain type of antibiotic related to penicillin. Over the past 50 years, treatment of these infections has become more difficult because staph bacteria have become resistant to various antibiotics, including the commonly used penicillin-related antibiotics (1). These resistant bacteria are called methicillin-resistant Staphylococcus aureus, or MRSA.More is on this web site where you can read about it http://www.cdc.gov/ncidod/hip/Aresist/mrsafaq.htm#1 . I must say though I cultured it in my lungs and not from an open sore. Melissa 29 w/cf and MRSA