This tiny cluster of bacteria is methicillin-resistant Staphylococcus aureus (MRSA), seen under a microscope. This strain of the common “staph” bacteria causes infections in different parts of the body – including the skin, lungs, and other areas. MRSA is sometimes called a “superbug” because it doesn’t respond to many antibiotics. Though most MRSA infections are minor, some can be life-threatening.
MRSA infections can appear as a small red bump, pimple, or boil. The area may be tender, swollen, or warm to the touch. Most of these infections are mild, but they can change, becoming deeper and more serious.
Bug bites, rashes, and other skin problems can be confused with MRSA because the symptoms are similar. ER doctors often ask patients who think they have a spider bite whether they saw the spider. These “bites” may turn out to be MRSA. When a skin infection spreads or doesn’t improve after 2-3 days on usual antibiotics, contact your doctor.