Which parasites live in the human body, photo with description

types of parasites in the body

Only after carefully reading the photos of parasites in the human body, is it possible to understand the diversity of representatives of this class. They differ in size and shape, are the causative agents of a number of diseases and have individual characteristics that help them to feed and reproduce at the expense of people. Depending on the type of parasite that caused the infection, internal invasions can be divided into two groups, which are infections by protozoa and helminthiasis.

Agents causing protozoan diseases

Pathologies of this type are caused by single-celled or protozoan microorganisms (amoebas). Usually, you can only see the appearance of the parasites with the help of several magnifications. Protozoa live inside a person for years and can be pathogenic (causing disease) and harmless. There are also beneficial parasites that feed on disease-causing microbes and protect the body from infectious diseases.

Oral Amoeba and Oral Trichomonas

Protozoa that live in the human oral cavity. When infected with these parasites, periodontal disease can develop, which is manifested by the accumulation of purulent secretion in the gums. The bacteria are located in the tonsils, cavities of decayed teeth and mucous membranes.

The oral amoeba has a rounded shape with a cloudy central part. Trichomonas looks like a pear with 4 flagella in front.


These protozoa do not form a cyst and can be transported from the oral cavity to the nasopharynx and respiratory organs. Treatment consists of using Trichopolum or Macmirora, in addition to antibiotics for the oral cavity.


They are internal parasitic protozoa. They are the causative agents of giardiasis. They parasitize in the vegetative phase and can turn into cysts. Adult trophozoites in the front have a wide rounded shape, pointed back. In the middle, two axostiles (support wires) are visible, visually dividing the lamblia in half. Each part has a core. These protozoa move with the help of 4 flagella.

Be careful

According to statistics, more than 1 billion people are infected with parasites. You may not even suspect that you have become a victim of parasites.

It is easy to determine the presence of parasites in the body by a symptom - bad breath. Ask loved ones if your breath smells in the morning (before brushing your teeth). In that case, there is a 99% chance that you are infected with parasites.

Parasitic infection leads to neurosis, rapid fatigue, sudden changes in mood and, later on, more serious illnesses begin.

In menparasites cause: prostatitis, impotence, adenoma, cystitis, sand, kidney stones and bladder stones.

In women: pain and inflammation of the ovaries. Fibroma, fibroids, fibrocystic mastopathy, inflammation of the adrenal glands, bladder and kidneys develop. As well as the heart and cancer.

We want to warn you immediately that you don't have to rush to the pharmacy and buy expensive drugs, which, according to pharmacists, will exterminate all parasites. Most drugs are extremely ineffective and also cause great damage to the body.

Parasite cysts reach 14 microns in size and are oval in shape. There are 4 cores inside. Giardiasis is manifested by abdominal pain, nausea, vomiting, heartburn and fecal disorders.

Amoeba Entamoeba histolytica

varieties of parasites

The causative agent of amoebiasis dysentery, belongs to a variety of parasites of the sarcodo class. It parasites in the human body in the form of trophozoites that vary in size from 15 to 60 microns and cysts (up to 20 microns). The location is the large intestine; in rare cases, it settles in the liver, lungs and brain. In the small intestine, the cyst membrane opens, each nucleus divides and an amoeba of 8 nuclei is formed. It gives rise to vegetative forms in which the cytoplasm is clearly distinguishable with a distinction between ectoplasm and endoplasm.


Among the symptoms of amebiasis are diarrhea in the form of crimson gelatin, cough with "coffee" sputum, high fever, pain in the right hypochondrium and a false desire to defecate (tenesmus).

Intestinal balantidium

The simplest organism in the ciliate class. It causes a disease in humans called balantidiasis, which is manifested by the formation of ulcers in the walls of the large intestine and intoxication of the body. Balantidium parasite in the form of active cysts and ciliates, whose body has an elongated shape from 30 to 150 microns in length.

For absorption of food in the body of the ciliate, there is an opening framed by eyelashes. The Balantidian cyst is similar to an egg about 55 microns in size and a thick shell.

Urogenital trichomonas

how are the parasites

Sometimes the parasite is called vaginal, but this is not correct. Trichomonas can live in a person regardless of gender and cause severe inflammation at the location. In men, they settle in the urethra and prostate, in women in any part of the genitourinary system.

In the life cycle of these simpler organisms, there is only one active phase, they do not form cysts. Trichomonas has a pear-shaped body up to 30 microns in length. In the middle of the sample, there is a dividing wire with a spike-shaped protrusion at the rear end. At the front there are flagella for movement.

Malaria by Plasmodium

These parasites are of various types and belong to the blood sporozoan class. A person is parasitized by pathogens:

  • three-day malaria;
  • four-day malaria;
  • tropical malaria;
  • oval of malaria.

The plasmodium changes shape depending on the stage of malaria. It can take the form of a cell surrounded by a ring, take the form of a ribbon and, in the end, start to divide with the formation of small cells that are introduced into the erythrocytes. In the last stage, rounded gametocyte cells are formed. Malaria is a serious infection and is manifested by attacks of fever with destruction of red blood cells.


The simplest human parasites are plagued and cause trypanosomiasis. The pathogen looks different at each stage of development:

  • Trypanosomal. The parasite's body has an elongated shape, there are flagella behind and a membrane is clearly visible.
  • Critical. Trypanosomal cells become elongated, the flagellum is located in the front, the membrane is absent.
  • Metacyclic. The most infectious stage for humans. The trypanosome has a membrane, but it does not have a free flagellum.


Pathogens can invade brain tissue and cause tissue edema. Trypanosomiasis is manifested by fever, enlarged lymph nodes and headache.

I've been feeling really bad for the past few years. Constant fatigue, insomnia, some kind of apathy, laziness, frequent headaches. There were also problems with digestion, bad breath in the morning.


pneumocysts in the body

They exist in the form of trophozoites, needles, cysts and sporozoites. Initially, pneumocysts have an irregular rounded shape with a thick membrane and pseudopod-like protuberances for contact with the pulmonary alveoli. Vacuoles and a nucleus are visible within the cells. A precisely looks like an egg with nuclei inside, from which cysts appear during division and, from them, in turn, sporozoites.

Pneumocysts are the causative agents of pneumocystosis in humans. The disease is manifested by dry cough, such as whooping cough and choking attacks.


This is a viscous amoeba. It actively moves in biological tissues and tolerates unfavorable temperatures well. You can catch nigleriosis when swimming in the water. The parasite enters the brain through the nasal passages.


The prognosis is usually lethal. The clinic is similar to meningitis (headache, stiff neck muscles). Treatment is often ineffective, in combination with antibacterial therapy, medications based on miconazole.


A common parasite on internal organs. It causes damage to the nervous system, myocardium, liver and spleen. In form, Toxoplasma resembles a slice of orange.


This is a large group of living organisms that parasitize the human body and cause helminthic invasions. According to its external description, all helminths are similar to worms, but have a different structure and size. The symptoms and treatment of worms are closely related. With light invasions discovered at random, just take a specific remedy; in severe cases, complex treatment will be necessary. According to biological characteristics, human helminths are divided into planes and round. In turn, flattened can be worms or tapeworms.


Shaped like a ribbon or a multi-segment chain. Each individual has a head and neck region, from which new segments grow. The clinical picture when infected by these worms is characterized by general exhaustion of the body, indigestion and intoxication.

  • Wide ribbon. It lives in the intestine and less often in the stomach, causes diphyllobotriasis and lives up to 10 years. The length of this parasite in the human body reaches 15 meters. The width of each segment of the parasite's body is greater than its length.
  • Pig tapeworm. It grows up to 3 meters and lives in the lumen of the small intestine. In the photo of the parasite on the human body, hooks in the head area are clearly visible. That is why the pig's tapeworm is called armada.
  • Bull tapeworm. It looks like a pig, but has no hook and can reach 10 meters in length. It lives in the small intestine for up to 30 years and causes Teniarinhoz's disease.
  • Alveococcus and echinococcus. These worms damage the liver and can migrate to other organs (brain, lungs). The size of the helminths is not more than 5-6 mm. The body consists of 3-4 segments. A characteristic of worms is the ability to form bubbles filled with larvae in human organs. In this form, parasites live in the human body for up to 10 years.


worms in the body

They are human parasites that belong to the trematode class and are called worms. The worms are located in the liver, lungs and bloodstream. Symptoms of infection of the body are manifested by pain in the right hypochondrium, cough, signs of intoxication and digestive disorders.

  • Liver worm. It is the causative agent of fascioliasis that lives in the hepatic ducts. At the stage of sexual maturity, it has a body length of up to 5 cm, shaped like a leaf and two suction cups on the abdomen and mouth. The parasite's eggs are less than 1 mm long, light yellow in color and have a cap on the stem.
  • Feline event. A dangerous parasite of internal organs, which is the causative agent of opistorquiasis. The worms are leaf-shaped and up to 13 mm in size. At the end of the head and in the middle of the abdomen there is a suction cup, the uterus is located in the front and the testicles in the back.
  • Lancet Fluke. The causative agent of dichroceliosis, in the external structure, is similar to the cat's paw, but the uterus is behind it and the testicles are in the front.
  • Pulmonary worm. Leaf worm up to 18 mm long with two suction cups and spines on the body surface. The pulmonary paw eggs are oval, yellowish in color and with a characteristic cover. A person is infected by eating crustaceans.


This is the most well-known type of parasite in the human body. Roundworm eggs remain viable in the environment for a long time. People carry the larvae of these parasites in their hands, animals in wool, insects in their paws.

human worms

The clinical signs of infection depend on the mass of the invasion. Most of the time, complaints are associated with decreased appetite, changes in body weight and discomfort in the abdomen.

  • Ascaris. Large spindle worms. The female reaches 40 cm in length, the male at 20. The color of the worms is gray-white, they live in pairs in the intestines. In the enlarged photo, you can see the cuticle-shaped mouth opening with three valves.
  • Pinworms. The most common parasites in children. The worms are small, the female is 12 mm, the male 5. In the female the tip is pointed, in the male it is bent to the abdomen. Pinworm eggs are microscopic in size and are often carried under children's nails if hygiene is not followed.
  • Vlasoglav. To feed this parasite in man, nature has given him a unique body. Its upper part is hair-like and easily penetrates the intestinal wall. The total size of the worm is no more than 5 cm.
  • Hookworms. In the human body, these dioecious worms are located in the area of ​​the duodenum and jejunum. The length of an adult individual is up to 14 mm, the width is about 0. 6 cm. The female lays up to 25, 000 microscopic eggs per day.
  • Trichinella. Small worms 2 to 4 mm long. Located between the muscle fibers and twisted in a spiral. Trichinella causes trichinosis in humans. Symptoms include muscle pain, malaise and fever.
  • Rishta. Included in the list of rare worms. If we consider the pictures of parasites living in the human body, the rishta is especially disgusting. It is a long worm in the form of a white thread. Its dimensions can reach 1 meter. Rishta is located under the skin on the legs, less often on the abdomen and back.
  • Toksokars. Worms of different sexes, up to 18 cm long. Parasites live in the stomach and intestinal tract, externally similar to ascaris.
  • Intestinal acne. This human parasite causes strongyloid disease. The size of the worm is about 3 mm, the body is almost transparent, the posterior end is pointed, in the anterior the valves of the lips are difficult to distinguish.
  • Filarias. Viviparous helminths up to 80 mm in length (females). The larvae in the body are called microfilariae and are able to migrate through the body's bloodstream, causing blood vessels to block. Signs of parasites are manifested by lymphatic congestion, development of elephantiasis, as well as heart and respiratory failure.