Parasites in the human body: types and what are

According to statistics, the worms infected more than half the world's population. Every person can become a so-called master for more than 300 species of these creatures. Some of them may exist within the person, not causing much concern. And others are often the cause of death.

types of parasites

To protect your body, you need to understand that there are parasites inside of us, how to identify their presence, and what treatment methods offered by modern medicine for their destruction.

Classification of parasites

The most common habitat is the intestine of worms. However, they can parasitize in various organs and tissues, including the liver, lungs, brain, skin and even eyes.

Each person is exposed to daily to be infested. They are literally surrounded by people. Potential hazards are animals, even beloved Pets. Larvae worms can live in soil, in water, in food and even float in the air.

To minimize the risk of infection, you should know the main types of parasites that live in man, and what signs give infection of some sort.

People can act for parasites as a primary and intermediate host. In the latter case, the worms use the human body as the transport, which delivers them to the destination.

Parasites, for which man is the primary host, are classified into the following types:

  • simple;
  • worms.

Features of infection of protozoa

Protozoa are not worms, but they often relate to their level. These parasites called protozoa, since they are composed of a single cell. Despite the simple structure, the simplest can become the reason of development of serious diseases.

Often within man dwell the following types of protozoa:

  • Giardia;
  • amoeba;
  • Toxoplasma;
  • Trichomonas.

Parasites in the human body, called Giardia, causes giardiasis. This disease is characterized by the following symptoms:

  • dysbacteriosis of the intestine;
  • vitamin deficiencies;
  • the General weakening of the body occurring as a result of intoxication by the waste products of Giardia;
  • dysfunction of digestion;
  • iron-deficiency anemia.

Parasites within us in the form of amoebas cause disease called amoebiasis. It manifests itself in intestinal and neurotic disorders.

After infection with Toxoplasma toxoplasmosis develops. These simple amaze the following internal organs:

  • brain;
  • eye;
  • heart;
  • nervous system.

A particular danger is toxoplasmosis for pregnant women, as toxoplasmosis is able to penetrate the placenta and enter the fetus's blood, causing a disruption in his development, and fetal death.

Infection of particular parasites leads to the development of trichomoniasis is a disease which affects the urinary system.

Helminths are the most common parasites in the human body, the bearers of which is up to 80% of the world population. They lead an active life, settled the various internal organs. Worms are very often the cause of chronic disease, and if untreated lead to death.

The most common types of helminths are worms:

  • nematodes;
  • flukes;
  • cestodes.



Infection by this species of worms exposed to both children and adults. Moreover, in children nematodes are much more common. This factor is due to the fact that you can get them through everyday life. Just one touch to the subject, on which there are eggs of these worms. But most often, the infection occurs through dirty hands, unwashed fruits and vegetables.

Nematodes – round worms is due to the structure of their body, whose length is from several millimeters to several tens of centimeters.

Despite the fact that the number of species of nematode that live inside the human body, more than four decades, it is advisable to examine their most common varieties. These include:

  • pinworms;
  • roundworm;
  • Trichinella;
  • vlasoglavy.

Signs of infection

Pinworms are the most common types of parasites in the human body. This disease is called the disease of dirty hands, and it most often affects children.

Body length pinworms do not exceed 1 cm Place of their habitat is the intestine. While pinworm females prefer to lay eggs in the folds of the anus, and crawling out.

The infection of pinworms is evidenced by the following characteristics:

  • itching in the anus;
  • signs of intoxication;
  • iron deficiency anemia;
  • sleep disturbance;
  • pain in the abdomen.

Signs of roundworm infection

Roundworm provoke the development of ascariasis. These parasites inside us live in the small intestine. Symptoms of ascariasis vary depending on the phase of development of the worms. When the larvae migrate through the bloodstream throughout the body, appear the following symptoms:

  • a slight increase in body temperature;
  • enlarged lymph nodes;
  • dry cough;
  • rales in the lungs.

If the parasites Lodge in the intestines, the symptoms change. They are expressed in the following:

  • the dysfunction of digestion;
  • pains in the abdomen;
  • in nausea, accompanied by vomiting.

Parasites also affect the nervous system. Infected people experience headaches, they have disrupted sleep quality, often have hysterical seizures and mental fatigue.

Signs of infection of Trichinella

Trichinella provoke the disease called trichinosis, which is deadly. They can be infected by eating meat from animals both domestic and wild, which was poorly cooked.

To recognize trichinosis is possible by the following features:

  • the infected person loses his appetite;
  • he develops indigestion and abdominal pain;
  • the allocation of metabolic products of the parasite causes the symptoms of intoxication, which are expressed in allergic rashes on the skin;
  • in a human patient, the body temperature rises to 40°C;
  • people start to feel pain in the muscles;
  • a distinctive feature of trichinosis is swelling of the eyelids.
treatment of parasites

Signs of whipworm infection

Whipworm, the round worm, which lives only in humans. This worm is parasitic in the large intestine, damaging its mucous membrane and poisoning the human body with waste products.

People infected by them, have the following complaints:

  • abdominal pain;
  • headache;
  • dizziness;
  • iron-deficiency anemia.


Some parasites live in the human body, in addition to the above? Another common type of worms are the trematodes or flukes. This name is due to the fact that the body of these worms have suckers by which they attach to the mucous membranes of the internal organs. These suckers allow the parasite to feed by absorbing blood and nutrients.

Intermediate host of trematodes is fish. Therefore, the infection they often occurs by eating poorly processed fish.

The most common types of flukes include the following types of worms:

  • Siberian flukes;
  • intestinal acne.

Siberian Fluke, whose body reaches a length of 2 cm, also called feline Fluke, because this parasite lives in the body of cats. The disease caused by them is called opisthorchiasis.

The main places of dislocation of the Siberian Fluke are the ducts of the gallbladder and pancreas and liver. In the process of life, this parasite causes the development of gastritis, gastric ulcer and duodenal ulcer, and cholecystitis and pancreatitis.

When infected intestinal acne in humans the disease develops. The length of the worm does not exceed 2 mm. However, human life can be spoiled even a little parasite.

Main symptoms of the disease are as follows:

  • the emergence of chronic diseases of the gastrointestinal tract;
  • the appearance of bronchial asthma;
  • the emergence of bronchitis.

People infected with intestinal acne, the state of becoming, suffers from frequent allergic rashes and anemia. In addition, this parasite can lead to the impossibility of conceiving a child.


This form of tapeworms, the body reaches a length of several tens of meters. Intermediate hosts of cestodes are even-toed ungulates. In the human body worms get by eating poorly processed meat.

The most common types of tapeworms:

  • a tapeworm;
  • pork tapeworm;
  • beef tapeworm;
  • the Echinococcus.

A tapeworm can reach a length of several meters, and can only live in the small intestine. The symptoms manifested in the following:

  • occurs ileus;
  • anemia;
  • disrupts the function of the gastrointestinal tract;
  • man becomes thin.

The body of the pork tapeworm can reach a length of 8 meters. And infection with this worm is accompanied by the following symptoms:

  • intestinal obstruction;
  • signs of General intoxication.

Length bovine tapeworm reaches 18 meters. Infection them leads to the development of conditions that threaten life. The symptoms are as follows:

  • in the intestinal obstruction;
  • in disorders of the gastrointestinal tract;
  • in iron deficiency anemia;
  • in allergic reactions;
  • in problems with the nervous system;
  • in General exhaustion of the organism.

Echinococcus enters the human body as larvae, which form cysts. A special danger is posed by large cysts that can rupture.

Diagnosis and treatment

Look parasites, looking at the photos. And if you have the slightest suspicion of their presence should immediately contact the doctor, who will determine the list of diagnostic procedures and prescribe treatment.

The main methods of diagnosis include the following:

  • laboratory examination of fecal masses;
  • blood tests;
  • swab of the anus;
  • CT and ultrasound.

Therapy against worms is carried out in several stages. At the initial stage the training of the body through the ingestion of sorbents, which contribute to detoxification. Next, the patient is assigned antibacterial therapy. Thus the action of each antibiotic aimed at the destruction of only certain types of worms.

The last stage is rehabilitation, which allows to strengthen the immune system and normalize the activity of all body systems.


Even knowing, what are the parasites, you should not try to destroy them yourself. Self-medication can be addictive to the antibiotics and worsen the General condition of the patient.