Here is a good, basic article about MRSA, from National Geographic – very nice to see National Geographic recognizing the importance and the growing problem of MRSA.
Drug-Resistant Staph Infection Spreads to Gyms, Day Care
MRSA has been seen in hospitals for about 30 years. There, it usually occurs among people with weakened immune systems, such as elderly patients with underlying illnesses, and patients who have had surgery.
The hospital-based infection may start out as redness around an intravenous line entry or a surgical wound, but it can spread to the lungs, causing pneumonia, or to the blood, causing breathing difficulties, fever, and malaise, possibly resulting in a life-threatening disease.