Cellulitis disease (1 of 3)

Cellulitis facts

• Cellulitis is a spreading bacterial infection of the skin and tissues beneath the skin.
• Staphylococcus and Streptococcus are the types of bacteria that are usually responsible for cellulitis, although many types of bacteria can cause the condition.
• Sometimes cellulitis appears in areas where the skin has broken open, such as the skin near ulcers or surgical wounds.
• Symptoms and signs include redness, tenderness, swelling, and warmth of the affected area.
• Cellulitis is not contagious.
• Cellulitis is treated with oral or intravenous antibiotics.

What is cellulitis?

Cellulitis is a bacterial infection of the skin and tissues beneath the skin. Unlikeimpetigo, which is a very superficial skin infection, cellulitis is an infection that also involves the skin's deeper layers: the dermis and subcutaneous tissue.

The main bacteria responsible for cellulitis are Streptococcus and Staphylococcus("staph"), the same bacteria that can cause impetigo. MRSA (methicillin-resistantStaph aureus) can also cause cellulitis. Sometimes, other bacteria (for example,Hemophilus influenzae, Pneumococcus, andClostridium species) may cause cellulitis as well.

Cellulitis is fairly common and affects people of all races and ages. Men and women appear to be equally affected. Although cellulitis can occur in people of any age, it is most common in middle-aged and elderly people. Cellulitis is not contagious.

What are cellulitis symptoms and signs?

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Cellulitis has characteristic symptoms and signs. It usually begins as a small area of tenderness, swelling, and redness that spreads to adjacent skin. The involved skin may feel warm to the touch. As this red area begins to enlarge, the affected person may develop a fever, sometimeswith chills and sweats, tenderness, andswollen lymph nodes ("swollen glands") near the area of infected skin.

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