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Saturday, March 29, 2008

Coeliac disease

Coeliac disease, also spelled Celiac disease, is an autoimmune disorder of the small bowel that occurs in genetically predisposed people of all ages from middle infancy. It is a digestive condition triggered by consumption of the protein gluten, which is found in bread, pasta, cookies, pizza crust and many other foods containing wheat, barley or rye. Oats may contain gluten as well. When a person with celiac disease eats foods containing gluten, an immune reaction occurs in the small intestine, resulting in damage to the surface of the small intestine and an inability to absorb certain nutrients from food.

Eventually, decreased absorption of nutrients (malabsorption) can cause vitamin deficiencies that deprive your brain, peripheral nervous system, bones, liver and other organs of vital nourishment, which can lead to other illnesses. The decreased nutrient absorption that occurs in celiac disease is especially serious in children, who need proper nutrition to develop and grow.

No treatment can cure celiac disease. However, you can effectively manage celiac disease through changing your diet.

Causes:
Normally, your small intestine is lined with tiny, hair-like projections called villi. Resembling the deep pile of a plush carpet on a microscopic scale, villi work to absorb vitamins, minerals and other nutrients from the food you eat. Celiac disease results in damage to the villi. Without villi, the inner surface of the small intestine becomes less like a plush carpet and more like a tile floor, and your body is unable to absorb nutrients necessary for health and growth. Instead, nutrients such as fat, protein, vitamins and minerals are eliminated with your stool.

The exact cause of celiac disease is unknown, but it's often inherited. If someone in your immediate family has it, chances are 5 percent to 15 percent that you may as well. It can occur at any age, although problems don't appear until gluten is introduced into the diet.

Many times, for unclear reasons, the disease emerges after some form of trauma: an infection, a physical injury, the stress of pregnancy, severe stress or surgery.

Symptoms:
There are no typical signs and symptoms of celiac disease. Most people with the disease have general complaints, such as intermittent diarrhea, abdominal pain and bloating. Sometimes people with celiac disease may have no gastrointestinal symptoms at all. Celiac disease symptoms can also mimic those of other conditions, such as irritable bowel syndrome, gastric ulcers, Crohn's disease, parasite infections, anemia, skin disorders or a nervous condition.

Celiac disease may also present itself in less obvious ways, including irritability or depression, anemia, stomach upset, joint pain, muscle cramps, skin rash, mouth sores, dental and bone disorders (such as osteoporosis), and tingling in the legs and feet (neuropathy).

Some indications of malabsorption that may result from celiac disease include: Weight loss, Diarrhea, Abdominal cramps, gas and bloating, General weakness, Foul-smelling or grayish stools that may be fatty or oily, Stunted growth (in children), Osteoporosis, etc.

Diagnosis:
People with celiac disease carry higher than normal levels of certain antibodies (anti-gliadin, anti-endomysium and anti-tissue transglutaminase). Antibodies are specialized proteins that are part of your immune system and work to eliminate foreign substances in your body. In people with celiac disease, their immune systems may be recognizing gluten as a foreign substance and producing elevated levels of antibodies to get rid of it.

A blood test can detect high levels of these antibodies and is used to initially detect people who are most likely to have the disease and who may need further testing. To confirm the diagnosis, your doctor may need to microscopically examine a small portion of intestinal tissue to check for damage to the villi. To do this, your doctor inserts a thin, flexible tube (endoscope) through your mouth, esophagus and stomach into your small intestine and takes a sample of intestinal tissue.

A trial of a gluten-free diet also can confirm a diagnosis, but it's important that you not start such a diet before seeking a medical evaluation. Doing so may change the results of blood tests and biopsies so that they appear to be normal.

Treatment:
Celiac disease has no cure, but you can effectively manage the disease through changing your diet.

Once gluten is removed from your diet, inflammation in your small intestine will begin to subside, usually within several weeks. If your nutritional deficiencies are severe, you may need to take vitamin and mineral supplements recommended by your doctor or dietitian to help correct these deficiencies. Complete healing and regrowth of the villi may take several months in younger people and as long as two to three years in older people.

Improvements after starting a gluten-free diet may be especially dramatic in children. Not only do their physical symptoms improve, but also their behavior improves. In addition, their growth starts to pick up.

Your doctor may recommend that you meet with a dietitian who can instruct you on a gluten-free diet. There are still many basic foods allowed in a gluten-free diet. These include:

* Fresh meats, fish and poultry (not breaded or marinated).
* Most dairy products.
* Fruits.
* Vegetables.
* Rice.
* Potatoes.
* Gluten-free flours (rice, soy, corn, potato).

Most foods made from grains contain gluten. Avoid these foods unless they're labeled as gluten-free or made with corn, rice, soy or other gluten-free grain.

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