Jan. 28, 2005 -- Actress Hilary Swank has disclosed that she developed a serious staph infection while shooting the movie Million Dollar Baby. Her infection is known medically as staphylococcus cellulitis.
In Swank's case, it started with a blister on her foot, resulting in "red marks going up my leg," and was extremely painful, she told Mike Wallace on CBS's 60 Minutes.
WebMD consulted Luis Ostrosky-Zeichner, MD, an infectious disease specialist at The University of Texas Medical School at Houston, for details on this type of staph infection.
What is staph infection?
It is a type of infection caused by a Staphylococcus (or "staph") bacteria. Actually, about 25% of people normally carry staph in the nose, mouth, genitals, and anal area. The foot is very prone to pick up bacteria from the floor. The infection often begins with a little cut, which gets infected with bacteria.
These staph infections range from a simple boil to antibiotic-resistant infections to flesh-eating infections. The difference between all these is how deep and how fast the infection spreads, and how treatable it is with antibiotics. The antibiotic-resistant infections are more common in North America, because of our overuse of antibiotics.
The type of staph infection that Swank had -- cellulitis -- involves the skin's deeper layers. It was not the flesh-eating type of infection. And it was treatable with antibiotics.
This type of infection is very common in the general population -- and more common and more severe in people with weak immune systems. People who have diabetes or weakened immunity are particularly prone to developing cellulitis.
What does staph infection look like?
Staph cellulitis usually begins as a small area of tenderness, swelling, and redness. Sometimes it begins with an open sore. Other times, there is no break in the skin at all -- and it's anyone's guess where the bacteria came from.
The signs of cellulitis are those of any inflammation -- redness, warmth, swelling, and pain. Any skin sore or ulcer that has these signs may be developing cellulitis. If the staph infection spreads, the person may develop a fever, sometimes with chills and sweats, as well as swelling in the area.