Parasite - an organism or plant that lives at the expense of another organism. In nature there are a great many different parasites. A special place is occupied by the gastro-intestinal parasites, including ljamblii that cause disease - giardiasis. Itself is a single-celled parasite leaves the body, having a pear-shaped with eight flagella. To consolidate on the wall of the intestine, this parasite has Suction disk. The surface of the human intestine has the type of brush fringes, which are final and digestion of food. As long ljamblii parasites in the human intestine, they do not themselves know how to digest food and feed products prepared food processing. Parasite leaves - a parasite of a purely human, so giardiasis develops only in humans and get them from pets can not. Lamblia life cycle of 40 days and they reproduce by dividing. All this happens in the gut. As a result of reductions produced by muscular intestinal parasites separation takes place and transfer them to the back part of the intestine, where increased acidity causes ljamblii covered with dense shell and become cysts. Cysts with faeces are excreted. A person who is ill giardiasis, may give a few million cysts in just one day, but for all contracting sufficiently 10-100 cyst. Disease giardiasis transmitted in three ways: water, food and contact-household. The greatest number of infected falls on the water. This may be a bad tap water or water from open sources. After food is easily infected with unwashed vegetables and other foodstuffs. Well, food or water through infected cysts of any household items. Through the mouth cysts bypassing the stomach, get into the duodenum, where each cyst is divided into two ljamblii etc. Giardiasis is not always pronounced the symptoms, many people just do not feel. The most common symptoms of Giardiasis are Pulled stomach pain, nausea, alternating diarrhea and constipation. There is a deficiency disease. And, although ljamblii not cause diseases of the gallbladder, they contribute to leakage of cholelithiasis, cholecystitis, and other similar diseases in a more severe form. Disease giardiasis is widespread. Most other giardiasis affects children, sometimes reaching 80% of the total number of individual staff. In adulthood infection giardiasis drops sharply, not exceeding 15%. This is easily explained, since main measures to combat infection by cyst ljamblii are measures of personal hygiene and compliance with necessary rules for cooking. Adult men more sensible approach to these requirements, than a child, so giardiasis atypical for him. In addition, the adult age increases immunity. The most common drug for treatment of Giardiasis - trihopol, which is well tolerated even by children. Trihopol relieves the intestine from lamblia and some other intestinal parasites. Usually, medication is used in conjunction with a diet. In particular, meat affects lamblia depressing, but the vegetarian food contributes to the development of these parasites. Thus, to avoid the disease giardiasis, it is enough to observe good personal hygiene, sanitation and hygiene rules when preparing food, to monitor the cleanliness of residential premises and deal with the flies, which also carry lamblia cysts.