Among the simplest organisms, there are many parasites of animals and humans. Listed below are parasitic protozoa that cause the most serious and common diseases.
Dysentery amoeba
The amoeba of dysentery is similar to the common one, but is smaller and has shorter and wider rhizomes. It enters the human digestive system through the mouth in the cyst stage. In the colon, 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 intestine, impoverishing the human body. There is an amoebic dysentery, or amoebiasis.
The amoeba of dysentery can enter the bloodstream and reach the liver. Here too, the parasite leads to the formation of purulent ulcers.
By forming cysts, amoebae leave the human body with undigested food waste. Mild cysts spread easily. If you do not wash your hands and food, you can become infected with them.
Plasmodium and malaria
Plasmodia is a parasitic protozoan. 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, feeds there, grows and multiplies. After that, many plasmodiums again enter the bloodstream and begin to parasitize on erythrocytes, destroying them and releasing their waste products, which poison the host. A person develops a fever, he suffers from anemia.
If a patient with malaria is bitten again by an anopheles mosquito, now the plasmodia will pass from person to 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.
brucei
The genus trypanosome is the parasitic protozoan with flagella (associated with euglena). Their main host is a vertebrate, and insects are usually carriers. Different representatives of trypanosomes cause different diseases of animals and humans. They mainly parasitize the blood and cerebrospinal fluid. The most famous and common disease caused by trypanosome species is sleeping sickness.
The carrier of sleep sickness is the tseche fly. This disease is typical of tropical Africa. Sleep sickness develops in two stages: a person’s first weeks are tormented by fever and pain after a month or more of drowsiness, sleep and coordination disorders, and a change in consciousness occur. The disease is easier to treat in the first stage.
Giardia
Giardia is a genus of parasitic flagella protozoa. Intestinal lamblia causes giardiasis in humans and animals, in which the parasite lives in the small intestine.
A person becomes infected with giardiasis by eating unwashed food containing Giardia cysts. Coming out of the cyst, the lamblia attaches to the intestine 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 of the body. One of them is Pendinsky skin ulcer disease.
Coccidia
Coccidia parasitize many animals, including worms, arthropods, and fish. They cause coccidiosis diseases, which cause serious damage to livestock and livestock.
Coccidia settle in the form of spores containing parasitic cells.
The genus Toxoplasma belongs to the coke. Their representatives cause such a widespread disease in humans as toxoplasmosis. A person becomes infected from pets or food of poorly cooked meat. Toxoplasmas affect many organs, including the nervous system.