Types of parasites in the human body

At all times very common were those that live in the human body, the parasites. According to who statistics, 50% of humanity infected more than 250 species of these creatures. Pests are parasitic way of life for many millennia. The human body is not able to destroy them yourself, as it is not able to recognize them. Malicious creatures of different size shock the human bodies, where they live at the expense of his master.

types of parasites

Most people are unaware of their presence. Only some signs can signal the presence of these pests: chronic fatigue, excessive fullness, gradually turning into obese. Symptoms are the body only when the number of parasitic creatures is greatly increased, and all systems of the body are completely relaxed.

The types of parasites


Pinworms – the most known human parasites that live in the intestine. The disease, which causes pinworms is called enterobiasis. From enterobiasis affects not only humans, but also chimpanzees. At increased risk for infection pinworms are children. According to various sources, the level of their involvement in the enterobiasis in pre-school age is from 25 to 90%.

Pinworms are passed from one person to another. Infection occurs through the hands, through clothing, using any objects which touched a sick person, provided that, after contact was made, washed hands, and eggs of pinworms came in her mouth (this is especially true during the meal). Transferring the eggs of these worms-nematodes may flies and cockroaches, seminis them food. Pinworms live in the small intestine, the caecum, the colon. They mate in the ileum, after which the female through the rectum crawls out of the anus and lays eggs in the anus.


Toxocara is a parasite from the group of nematodes. The disease, which causes Toxocara is called toxocariasis. Toxocariasis in humans can be larval (visceral and ocular) and intestinal forms. This disease is widespread all over the world.

Toxocaras infection occurs by ingestion of eggs of worms in the human digestive tract. This most often occurs when eating food or water contaminated by feces of dogs. No less dangerous contact with sick animals. Natural carriers of Toxocara are cats and dogs, foxes and wolves. Once in the human body, the larvae of the worm migrate through the blood vessels and may settle in any organ. It will depend on the symptoms of the disease.

Most often toxocariasis manifests itself in the form of allergic reactions (angioedema, skin rashes, bronchial asthma). During the exacerbations there may be an increase in body temperature to 38 degrees, but the symptoms of intoxication in this poorly expressed. Suspected toxocariasis can be enlarged lymph nodes.

The visceral form of toxocariasis is the most common, occurs with a lesion of internal organs (intestine, respiratory system, heart valves). People may feel abdominal pain in the right hypochondrium, dyspepsia, nausea.

With the defeat of the respiratory system in humans there is a shortness of breath, dry cough, asthma.

types of parasites in the body


The human Ascaris is a round worm parasitica in the small intestine. The disease that provoke the parasite is called ascariasis.

The master of roundworm and the source of infection is a sick man. With the feces the eggs of worms enter the soil where they Mature to larvae. Then this soil is transferred to the food or on the hands of man, and the poor personal hygiene and poor handling of fruit, vegetables and berries – in the digestive tract. More susceptible to infection, children and rural inhabitants.

Ascariasis is manifested in different phases of their development in different ways. A phase of larval migration through the body is an increase in body temperature, there is a dry cough. rales in lungs, increase in size the lymph nodes. Children suffer ascariasis harder than adults. A characteristic symptom of ascariasis are allergic skin reactions.

While parasitism in the intestine, the patient developed dyspepsia, diarrhea is replaced by constipation, frequent abdominal pain, nausea and vomiting. From the nervous system are observed hysterical fits, insomnia, mental fatigue, headaches.

Hookworm and necator

Hookworm and necator are two species of roundworms belonging to the family Ancylostomatidae and provoke the disease called hookworm morbo.

There are two ways of infecting the human body these parasites is fecal-oral (contaminated water, fruits, vegetables) and dermal contact with soil (penetration occurs through the skin).

Clinical symptoms of hookworm disease: papular-vesicular rash, shortness of breath and cough, loss of appetite, nausea, abdominal pain, diarrhea, anemia with iron deficiency.

A tapeworm refers to tapeworms from the squad Pseudophyilidea. These parasites live in the small intestine of humans and other mammals are creatures that consume fish. Intecom infection provokes the development of diseases such as difillobotrioz. There are 12 types of tapeworms that can parasitize in the human body, however, the most common is a tapeworm.

Infection occurs by eating uncooked or raw salted fish or caviar, which contains worm eggs.

Symptoms of the presence of the parasite in the intestine: nausea, abdominal pain, anemia. In severe cases developing intestinal obstruction.

Beef tapeworm (tapeworm)

Beef tapeworm is a tape worm, belongs to the family Tenido. In the larval stage affects cattle and stage of the tapeworm lives in the human body (in the intestine). Specimen provokes a disease called beef tapeworm infection, as a rule, in the body there is one parasite.

Human infection occurs through the alimentary after eating poorly thermally processed meat (beef).

Clinically the disease is manifested by nausea, pain in the abdomen, unstable stool, allergic reactions on the type of urticaria.

Pork tapeworm

Pork tapeworm refers to tapeworms parasitica, which infects the organism of mammals. The intermediate host can be pigs, dogs, rabbits, camels, but the final host is always the people. If a person is manifested in the body of the adult parasite, talking about this disease, as taeniasis. If the patient's body the parasite is in the larval stage, the disease is called cysticercosis.

The pork tapeworm infection occurs by eating raw meat of pigs. Sometimes sources of cysticerci are seeded or water. Patient taeniasis is an epidemiological threat to himself (infestation of larvae in the brain, skin, eyes or skeletal muscles) and others.

Symptoms of teniasis: abdominal pain, appetite loss, irregularity, headaches, frequent dizziness, fainting (very dangerous taeniasis brain and eyes).

For the treatment of teniasis patient placed in a hospital. For the treatment of cysticercosis eyes and brain surgical intervention is necessary.

types of parasites roundworms

Echinococcus is a tape worm from the order of cyclophyllid. Adults are parasitic in the intestines of dogs and cats, are found in jackals and wolves. For humans the larvae of parasites that can cause serious disease – echinococcosis.

The larvae can infect the internal organs, forming them into hydatid cysts. People for echinococcal acts as an intermediate host. Infection by contact (in the process of butchering, the interaction with sick animals) or alimentary infections (when used in seeded food or water). At risk are people who are engaged in farming or who have regular contact with animals.

Symptoms may not appear for many years. If an asymptomatic stage is completed, in place of the introduction of larvae, there could be pain, itching, possible effects of urticaria. Also affect the functioning of the body, inside of which parasitizes the larva of Echinococcus. The increase in body temperature and fever is observed during the suppuration of the cyst.


Alveolar is a helminth from the group cestodosis. The worm calls threat to human life alveococcosis disease, which is characterized by the formation of the primary tumor in the liver with subsequent spread of metastasis to other organs.

Infection occurs by ingestion in the mouth of the oncospheres of the parasite. This can happen during a hunt, during butchering of wild animals, contact with Pets, by eating the raw berries and herbs from the forest.

Alveococcosis symptoms are reduced to the pain in the right hypochondrium, belching, nausea. There is often itching. allergic reactions. It is not excluded suppuration of the tumor with the parasite and its breakthrough in the peritoneal or pleural cavity. Metastases of alveoli can be detected in the brain and lungs.

Surgical treatment of the disease, but must be supplemented by the reception of antiparasitic drugs (Levamisole, Mebendazole).

Lamblia (also called Giardia) is a parasite of the genus of flagellates related to the order of diplomonad. Giardia provoke illness called giardiasis, and parasites in the small intestines of humans and many other mammals, creatures and even birds.

Lamblias infection occurs by the fecal-oral route: food, water and contact-household ways. The greatest value in terms of transmission is consumption of raw water, contaminated food, use of public items, anorum seeded Giardia.

Despite the amoeba

Despite the amoeba is a protozoal parasite which causes a disease called amoebiasis. Disease manifests itself in the appearance of ulcers in the large intestine, with the subsequent defeat of other internal organs.

Infection of amoebae occurs by the fecal-oral route, after Mature cysts with water or food fall into the gastrointestinal tract of man. The possible contact transmission of the parasite through unwashed hands. Carriers of the amoebas can be flies. Another method of distribution of amebiasis is sex (anal sexual intercourse).

Symptoms of amoebiasis: an abundant mucous stool, abdominal pain, blood in the stool, weight loss, anemia. In addition, for extraintestinal amebiasis is characterized by the formation of abscesses in those organs which are affected by parasites (lung, brain, liver, etc.).


Illness called gnathostomes cause larvae and adult nematode Gnathostoma spinigerum.

Infection occurs by eating raw meat of fish, frogs or birds, and by drinking unboiled uninfected water.

Symptoms are manifested in cough, and pain at the site of penetration of larvae under the skin, local inflammation and fever. Characterized by cutaneous swelling and itching. As a rule, after a week of manifestation of symptoms, they disappear but recur again for many years. Dangerous loss of the eyeball and brain that is often fatal.


Trichinella are parasitic round worms, which in the larval stage residing in the muscles (oculomotor, masticatory muscles of the diaphragm), and into adulthood in the lumen of the small intestine. The disease that provoke Trichinella is called trichinosis. It is deadly.

Human infection occurs by eating raw or poorly processed meat of wild and domestic animals.

parasites Trichinella

The symptoms of the disease are expressed in loss of appetite, vomiting, diarrhea and abdominal pain. Later joined by muscle pain, swelling of the eyelids, skin rash, body temperature increased to 40 degrees.

Shistosoma are worms-flukes of the genus of trematodes. They cause the disease called schistosomiasis. Human infection occurs during bathing, while washing clothes, watering the earth with water and larvae of schistosomes. They are able to penetrate the human body even through a holistic skin and mucous membranes.

Symptoms in the acute stage of the disease are expressed in increase of temperature up to high marks in skin itching and appearance of papules all over the body. Once the disease enters the chronic stage, it may be signs of vaginitis. prostatitis. colitis, ascites, hydronephrosis, and t.. D.