Among the simplest organisms, there are many parasites of animals and humans. Listed below are the parasitic protozoa that cause the most serious and common diseases.
dysentery amoeba
Dysentery amoeba is similar to the common one, but it is smaller and has shorter and wider rhizomes. It enters the human digestive system through the mouth at the cyst stage. In the large intestine, the amoeba leaves the cyst and feeds on bacteria without harming humans. In the future, this simpler organism begins to invade the intestinal wall, feed on red blood cells and become a parasite. Ulcers form in the intestines, depleting the human body. There is an amoebic dysentery disease, or amoebiasis.
Dysenteric amoeba can enter the bloodstream and reach the liver. Here, too, the parasite leads to the formation of purulent ulcers.
Forming cysts, amoebas leave the human body with undigested food scraps. Mild cysts are easily disseminated. If you don't wash your hands and food, you can get infected with them.
Malaria plasmid
Plasmodia are parasitic protozoa. Some types of Plasmodium cause malaria in humans. The carrier of the malaria plasmodium is the malaria mosquito. During an insect bite, plasmodium enters the host's bloodstream. Along with the blood, it reaches the liver, where it feeds, grows and multiplies. After that, many plasmodia re-enter the bloodstream and start to parasitize the erythrocytes, destroying them and releasing their waste, which poisons the host. A person gets a fever, suffers from anemia.
If a malaria patient is bitten again by an anopheles mosquito, the Plasmodium will now pass from the person to the mosquito. In the body of a mosquito, Plasmodium reproduces sexually.
Malaria is common in Africa. This is a very dangerous disease. Fight against malaria, including the destruction of malaria mosquitoes.
trypanosomes
The genus trypanosomes are parasitic protozoa with flagella (related to euglena). Its main host is a vertebrate, and insects are often carriers. Different representatives of trypanosomes cause different diseases in animals and humans. They parasitize mainly in blood and cerebrospinal fluid. The most famous and common disease caused by the trypanosome species is sleeping sickness.
The carrier of sleeping sickness is the tsetse fly. This disease is typical of tropical Africa. Sleeping sickness develops in two stages: a person's first few weeks are plagued by fever and pain, after a month or more there is drowsiness, disturbances in sleep and coordination, and a shift in consciousness. The disease is easier to treat in the first stage.
Giardia
Giardia is a genus of parasitic flagellated protozoa. Intestinal lamblia causes giardiasis in humans and animals, in which the parasite lives in the small intestine.
<1_img_blockxx>A person becomes infected with giardiasis by eating unwashed food containing Giardia cysts. Leaving the cyst, lamblia adheres to the intestines and feeds on digested food.
Leishmania
Leishmania is another genus of parasitic protozoa. They cause leishmaniasis in humans and many other animals. Vectors are mosquitoes.
There are different types of leishmaniasis associated with damage to various tissues in the body. One of them is Pendinsky's ulcer, a skin disease.
coccidia
Coccidia parasitize many animals, including worms, arthropods and fish. They cause coccidiosis diseases, which cause serious damage to livestock and fish farming.
Coccidia establish themselves in the form of spores containing cells of the parasite.
The genus Toxoplasma belongs to the coccidia. Its representatives cause a disease as widespread in humans as toxoplasmosis. A person is infected by pets or undercooked meat. Toxoplasmas affect many organs, including the nervous system.