If you eat none vej food or diet you should be careful not to eat uncooked or undercooked meat of pigs or cows. It may cause cysticercosis.
There are only a few organisms that complete its life circle in tow different creatures. The one is Tenia saginata, Tenium solium or the other is mosquitoes.Tenia solium is flat worm belonging to the platy helminthes group. It causes diseases like cysticercosis. Cysticercosis is dangerous disease in which the patient may suffer from epileptic like seizers. It completes its life circle in tow hosts. Man is the sole definite host of Tenia solium
and Tenium saginata. Its intermediate host is cows, buffaloes or pigs. Man can not be its intermediate host. It completes its adult stage in man and larvae stage in animals. The adult worm lives in the small intestines of man. The eggs or gravid segments are passed out with the faeces (stool) on the ground or in the open fields as in India. . The animal’s cow, buffalo swallow these eggs while grazing in the field. The pigs directly swallow man’s stool. Cattle and other herbivores become infected by ingesting vegetation contaminated with eggs. On reaching the alimentary canal of the intermediate host, the radically striated walls of eggs rupture and oncosphere area liberated. These penetrate the gut wall with the aid of their hooks and gain entrance into portal vessels or mesenteric lymphatics, finally reaching the systemic circulation. Usually they travel via the portal vein, and successfully reach the following organs: the liver, the right side of heart, lungs, the left side of the heart and systemic circulation .The naked oncosphere are filtered out from the circulating blood in to
the muscular tissue. Where they ultimately settle down and undergo further development. When these eggs reach the animal’s intestines, the eggs release the oncosphere, which evaginates, invades the intestinal wall and migrate to the satriataed muscles of the animals. In the animal muscles the flat worm develops into a cysticercus bovis or cysticercus cellulose. This is the larval stage of this worm. This larval stage of worm reaches human intestines by eating raw or uncooked meat of these animals. The cysticercus can survive several years in the animal. When the humans eat the raw or uncooked food or meat of these animals, they become infected. In the human intestines the cysticercus develops into adult tape worm within two months. Its length can be from 30to 50feet in the human intestines. If its eggs are swallowed than they hatch in the stomach. From there the larvae can enter blood stream and eventually reach brain. . It is very astonishing fact that this tape worm can live unto 30 long years in human intestines. The larva gets discharged inside the stomach, penetrate the intestinal wall and enter the blood stream, When it develops into adult tape worm in brain, it produces many symptoms like vomiting, headache of various intensity, seizures and fits, nausea, dizziness, altered mental states, confusion, lack of attention to people and surroundings, difficulty with balancing of body, swelling of the brain etc. The convulsions are very common but occasional. The human brain also contains plenty of oxygen and nutrients, which provides the perfect environmental conditions for worm to thrive and grow quickly.
Read more: http://scienceray.com/biology/ecology/how-the-tenia-saginata-completes-its-life-circle/#ixzz1TkIMVsFm