Among the simplest organisms are many parasites of animals and humans. Below are the parasitic protozoa that cause the most serious and common diseases.
Dysentery amoeba
Dysentery amoebae are similar to the usual, but smaller and have shorter and wider rhizomes. In the cyst stage, it enters the human digestive system through the mouth. In the large intestine, the amoeba leaves the cyst and feeds on bacteria without harming humans. In the future, this simplest organism begins to invade the intestinal wall, feed on red blood cells and become a parasite. Ulcers form in the intestines, the human body is depleted. Have an amoebic dysentery or amebiasis disease.
The dysentery amoeba enters the bloodstream and reaches the liver. Here, too, the parasite causes the formation of purulent ulcers.
The amoebae that form the cysts leave the human body with undigested food waste. Mild cysts spread easily. If you do not wash your hands and food, you can infect them.
Plasmodia of malaria
Plasmodia parasitic protozoa. Some types of plasmodia cause malaria in humans. The carrier of malaria plasmodia 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. Many plasmodia then re-enter the bloodstream and begin to parasitize erythrocytes, destroying them and releasing waste products that poison the host. A person has a fever and suffers from anemia.
If a malaria patient is bitten again by an anophel mosquito, the plasmodia will pass from humans to mosquitoes. Plasmodium reproduces sexually in the body of a mosquito.
Malaria is common in Africa. This is a very dangerous disease. Fight malaria, including the destruction of mosquitoes.
Trypanosomes
Trypanosomes are a sexual, flagellar (related to euglena) parasite protozoa. Their main host is a vertebrate, and insects are generally carriers. Different representatives of trypanosomes cause different diseases in animals and humans. They are mainly parasitized in the blood and cerebrospinal fluid. The most common and most common disease caused by trypanosomiasis is sleep disorders.
The carrier of sleeping sickness is the tsetse fly. The disease is typical of tropical Africa. Sleep sickness develops in two stages: a person suffers from fever and pain in the first weeks, and after a month or more of drowsiness, sleep and coordination disorders and changes in consciousness. The disease is easier to treat in the first stage.
Giardia
Giardia is a genus of protozoa with a parasitic flag. Intestinal lamblia causes giardiasis in humans and animals where the parasite lives in the small intestine.
A person with giardiasis cyst becomes infected with giardiasis by eating unwashed food. The lamblia from the cyst attaches to the intestines and feeds on digested food.
Leishmaniasis
Leishmania is another genus of parasite protozoa. They cause leishmaniasis in humans and many other animals. Vectors are mosquitoes.
There are different types of leishmaniasis associated with damage to different tissues of the body. One of them is skin disease Pendinsky ulcer.
Coccidia
It parasitizes many animals, including coccidia, worms, arthropods and fish. They cause coccidiosis, which causes serious damage to livestock and fish farming.
Coccidia precipitate in the form of spores containing parasitic cells.
Toxoplasma refers to sexual coccidia. Their representatives cause a widespread disease in humans, such as toxoplasmosis. A person is infected by pets or poorly cooked meat dishes. Toxoplasmas affect many organs, including the nervous system.