School officials around the country have been scrambling this week to scrub locker rooms, reassure parents and impress upon students the importance of good hygiene.

The heightened alarm comes in response to a federal report indicating that the bacteria, methicillin-resistant Staphylococcus aureus, or MRSA, are responsible for more deaths in the United States each year than AIDS.

MRSA (pronounced MEER-suh) is a strain of staph bacteria that does not respond to penicillin or related antibiotics, though it can be treated with other drugs. The infection can be spread by sharing items, like a towel or a piece of sports equipment that has been used by an infected person, or through skin-to-skin contact with an open wound.

• The New York Times October 19, 2007