May 15, 2012

Necrotizing Fasciitis (Flesh-Eating Bacteria). Causes. Symptoms. Treatment

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Necrotizing fasciitis is an infection caused by bacteria. It can destroy skin, fat, and the tissue covering the muscles within a very short time.
The disease sometimes is called flesh-eating bacteria. When it occurs on the genitals, it is called Fournier gangrene.

Necrotizing fasciitis is very rare but serious. About 1 out of 4 people who get this infection die from it.1 Many people who get necrotizing fasciitis are in good health before they get the infection.

Your risk of getting this infection is higher if you:
What causes necrotizing fasciitis?

Necrotizing fasciitis is caused by several kinds of bacteria. Some of these bacteria also cause infections such as strep throat and impetigo. Usually the infections caused by these bacteria are mild. But in rare cases they can cause a more dangerous infection.

You can get necrotizing fasciitis when bacteria enter a wound, such as from an insect bite, a burn, or a cut. You can also get it in:
  • Wounds that come in contact with ocean water, raw saltwater fish, or raw oysters. You also can get it through injuries from handling sea animals such as crabs.
  • An intestinal surgery site, or in tumors or gunshot injuries in the intestines.
  • A muscle strain or bruise, even if there is no break in the skin.
Bacteria that cause necrotizing fasciitis can be passed from person to person through close contact, such as kissing, or by touching the wound of the infected person. But a person who gets infected by the bacteria is unlikely to get necrotizing fasciitis unless he or she has an open wound, chickenpox, or an impaired immune system.

What are the symptoms?

The symptoms often start suddenly after an injury. You may need medical care right away if you have pain that gets better over 24 to 36 hours and then suddenly gets worse. The pain may be much worse than you would expect from the size of the wound or injury. You may also have:
  • Skin that is red, swollen, and hot to the touch.
  • A fever and chills.
  • Nausea and vomiting.
  • Diarrhea.
The infection may spread rapidly. It quickly can become life-threatening. You may go into shock and have damage to skin, fat, and the tissue covering the muscles. (This damage is called gangrene.) Necrotizing fasciitis can lead to organ failure and death.

How is necrotizing fasciitis diagnosed?

The doctor will diagnose your infection based on how suddenly your symptoms started and how quickly the infection is spreading. The infected tissue may be tested for bacteria. You also may need X-rays, a CT scan, or an MRI to look for injury to your organs or to find out how much the infection has spread

How is it treated?

Early treatment of necrotizing fasciitis is critical. The sooner treatment begins, the more likely you will recover from the infection and avoid serious complications, such as limb amputation or death. You may be treated in the intensive care unit (ICU) at the hospital.
Treatment may include:
  • Surgery that removes infected tissue and fluids to stop the spread of infection. Surgery is almost always needed. Most people need several surgeries to control the infection. Removing limbs (amputation) or organs may be done to save the person's life, depending on how severe the infection is and where it has spread.
  • Medicines (such as antibiotics). These kill the bacteria causing the infection.
  • Procedures to treat complications such as shock, breathing problems, and organ failure.
  • Hyperbaric oxygen therapy. This can help prevent tissue death and promote healing.
What if you have been near someone who has the disease?

Necrotizing fasciitis is very rare. Bacteria that cause the disease usually don't cause infection unless they enter the body through a cut or other break in the skin.

If you have been in close contact with someone who has necrotizing fasciitis, your doctor may give you an antibiotic to help reduce your chances of getting the infection. If you develop any symptoms of infection (such as pain, swelling, redness, or fever) after you've been in close contact with someone who has it, see your doctor right away.

To help prevent any kind of infection, wash your hands often, and always keep cuts, scrapes, burns, sores, and bites clean.



Source:Webmd
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Flesh Eating Disease - News.

Aimee Copeland, a Georgia student recently lost her leg to a rare flesh-eating infection after a zip line injury.

Yet Aimee Copeland -- who has lost a leg and part of her abdomen to the virulent bacteria and may lose more, including her fingers -- is keeping her spirits strong, her father said.

The bacteria that triggered the infection, Aeromonas hydrophila, thrives in warm climates and fresh water like the river where Copeland was zip lining with friends. The common germ rarely causes flesh-eating disease. But when it does, the infection carries a fatality rate upward of 60 percent, according to 2010 report published in the journal Clinical Microbiology Reviews. 

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