Intestinal parasites in adults and children

Intestinal parasites are worms that are parasitic in the human intestine, eat content or suck blood from the intestinal wall.

In humans, they can cause serious, life-threatening diseases. They occur mainly in children living in tropical and subtropical rural areas of Africa, the Middle East, South Asia, Indonesia and Central and South America.

some of the parasites in the human gut

People in the Mediterranean regions of Europe and southern parts of North America, they are relatively rare.

Adult size can be 1 mm to several meters. They penetrate the intestinal wall of man and begins to suck their blood or live there freely, using the nutrients.

The result of the action of these parasites is inflammation of the small or large intestine ulcers, anemia, lack of vitamins (mainly A, C, B12). In more severe cases, there may be intestinal obstruction and then help, you need to contact the surgeon.

The larvae can migrate to other organs (liver, spleen, bladder, muscles, lungs, brain), where they form cysts and cause allergic inflammation.

Infestation is the infection of human, animal or plant parasites (such as worms).

Symptoms of infection

Intestinal parasites can live in human intestines for years without causing any symptoms.

The most common symptoms and signs can appear a few weeks or months after the attack and manifest as pallor, weakness, frequent fatigue (anemia due to loss of blood sucked by worms), sleep disturbances and weight loss.

Abdominal symptoms can last from several weeks to several months, and includes:

  • Swelling.
  • Bad breath.
  • Loss of appetite.
  • Vomiting.
  • Itching in the anal area.
  • Diarrhea.
  • Blood in the stool.
  • The presence of worms or particles in the stool.
  • Itching and rashes on the skin.
  • Swelling around the eyes.
parasites in the human gut

Sources of infection

Eggs of intestinal parasites belonging to the environment with infected feces of humans or animals. People outside the body, eggs need several days or weeks to develop the stage of the cysts, or immature worms (larvae) that can be transmitted between people through dirty hands or when you eat raw unwashed vegetables.

Another source of infection is eating rare domestic pigs meat, fish or wild animals (wild boar, deer, etc.).

Can also be transmitted through fleas, who are carriers of Pets.

Certain intestinal parasites can penetrate through the skin during swimming or walking barefoot; when they reach the small or large intestine they begin to develop to adults.

Roundworms (nematodes)

The human Ascaris is found all over the world. It reaches a length of 16 cm and a thickness of a pencil.

Nematodes are mainly found in tropical areas. When they came to the intestine, they begin to suck blood from the intestinal wall.


White worms, of a length not exceeding half an inch. At night you can come to the surface in the anal area, the eggs, which leads to severe itching.


Cause trichinosis, you can get infected if you eat poorly cooked infected meat.

They can move from the intestine to the muscles and other organs, where they form a cyst — encapsulated form in which it is difficult to get rid of. The main symptoms — abdominal pain, muscles, joints, swelling of the eyes and skin rash.


Blood flukes cause intestinal schistosomiasis. Found mostly in Africa, the middle East, the Caribbean and South America. Length up to 25 mm and a thickness of about 1 mm. Eggs of blood flukes can be detected in feces and urine.


The tapeworm enters the human body through eating contaminated fish. The length of the parasite can reach 10 meters. Distributed throughout Europe, Russia and the united states.

Beef and pork apni

It can be transmitted by eating undercooked beef or pork.

The parasite is distributed worldwide, are particularly vulnerable to infection people living in rural areas. Adult worms can reach lengths of over 20 meters.
parasites of the human intestine Trichinella

Cucumber tapeworm

Common pet dogs and cats. People rarely are infected with intestinal parasites information is taken into account, that the main source of distribution of the cucumber tapeworm eggs fleas.

If you are suffering from inexplicable bloating, diarrhea, weakness or weight loss, first and foremost, the physician should suspect, as the possible reasons for the infestation of intestinal parasites. To confirm this, you need to donate blood and feces for analysis.


For prevention you should make the following recommendations:

  • Always wash your hands after using the toilet, use the soil, and after contact with Pets.
  • Do not walk barefoot, and do not swim in stagnant shallow waters.
  • Carefully heat-treated meat products.
  • Regularly pass medical examination.