Necrotizing
soft tissue infection is a rare but very severe type of bacterial
infection. It can destroy the muscles, skin, and underlying tissue. The
word "necrotizing" refers to something that causes body tissue to die.
Causes
Many different types of bacteria can cause this infection. A very severe and usually deadly form of necrotizing soft tissue infection is due to Streptococcus pyogenes, which is sometimes called "flesh-eating bacteria."Necrotizing soft tissue infection develops when the bacteria enters the body, usually through a minor cut or scrape. The bacteria begins to grow and release harmful substances (toxins) that kill tissue and affect blood flow to the area. As the tissue dies, the bacteria enters the blood and rapidly spreads throughout the body.
Symptoms
Symptoms include:- Small, red, painful lump or bump on the skin
- Changes to a very painful bruise-like area and grows rapidly, sometimes in less than an hour
- The center may become black and die
- The skin may break open and ooze fluid
- Feeling ill
- Fever
- Sweating
- Chills
- Nausea
- Dizziness
- Weakness
- Shock
Exams and Tests
Your doctor or nurse may diagnose this condition by looking at your skin. You may be diagnosed in an operating room by a surgeon.Tests that may be done include:
- CT scan
- Blood tests
- Skin tissue biopsy
Treatment
Immediate treatment is needed to prevent death. Treatment includes:- Powerful, broad-spectrum antibiotics given immediately through a vein (IV)
- Surgery to drain the sore and remove dead tissue
- Special medicines called donor immunoglobulins (antibodies) to help fight the infection in some cases
- Skin grafts after the infection goes away to help your skin heal and look better
- Amputation if the disease spreads through an arm or leg
- 100% oxygen at high pressure (hyperbaric oxygen therapy) for certain types of bacterial infections
Outlook (Prognosis)
How well you do depends on:- Your overall health (especially if you have diabetes)
- How fast you were diagnosed and how quickly you received treatment
- The type of bacteria causing the infection
- How quickly the infection spreads
- How well treatment works
Death can occur rapidly without proper treatment.
Possible Complications
- Infection spreads throughout body, causing a blood infection (sepsis), which can be deadly
- Scarring and disfigurement
- Loss of your ability to use an arm or leg
- Death
When to Contact a Medical Professional
This disorder is severe and may be life threatening, so contact your health care provider immediately if symptoms of infection occur around a skin injury, including:- Drainage of pus or blood
- Fever
- Pain
- Redness
- Swelling
Prevention
Always clean the skin thoroughly after a cut, scrape, or other skin injury.Alternative Names
Necrotizing fasciitis; Fasciitis - necrotizing; Flesh-eating bacteria; Soft tissue gangrene; Gangrene - soft tissueUpdate Date: 11/22/2011
Updated by: Kevin Berman, MD, PhD, Atlanta Center for Dermatologic Disease, Atlanta, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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