Among the simplest organisms are many animal and human parasites. Listed below are the parasitic protozoa that cause the most severe and common diseases.
Dysentery amoeba
Dysentery is similar to the common amoeba but has smaller, shorter and wider rhizomes. In the cyst stage, it enters the human digestive system through the mouth. In the colon, the amoeba leaves the cyst and feeds on bacteria without harming people. In the future, this simplest organism will start to penetrate the intestinal wall, feed on red blood cells and become a parasite. Ulcers form in the intestines that deplete the human body. There is a disease of amoebic dysentery or amebiasis.
Dysentery can enter the bloodstream and reach the liver in the amoeba. Here, too, the parasite leads to the formation of purulent ulcers.
Forming cysts, amoebas leave the human body with undigested food debris. Light cysts spread easily. If you do not wash your hands and food, you may become infected with them.
Plasmodium malaria
Plasmodia is a parasitic protozoa. Some types of plasmodia cause malaria in humans. The carrier of malaria plasmodia is the malaria mosquito. During insect bites, plasmodium enters the bloodstream of the host. Along with the blood, it reaches the liver, where it feeds, grows and multiplies. After that, many plasmodias re-enter the bloodstream and begin to parasitize on erythrocytes, killing them and releasing their waste products that poison the host. Man has a fever and anemia.
If a malaria patient is bitten again by an anopheles mosquito, plasmodia passes from man to mosquito. In the body of the 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
Trypanosomes are genera of parasitic protozoa with flagella (associated with euglena). Their main hosts are vertebrates, and insects are usually carriers. Different representatives of trypanosomes cause different animal and human diseases. They parasitize mainly in the blood and cerebrospinal fluid. The most famous and common disease caused by trypanosome species is sleeping sickness.
The carrier of sleeping sickness is the chatter. This disease is characteristic of tropical Africa. Sleep disease develops in two stages: the first weeks of a person are plagued by fever and pain, after one or more months of drowsiness, sleep and coordination disorders, and changes in consciousness occur. The disease is easier to treat in the first stage.
Giardia
Giardia is a genus of parasitic flagellate protozoa. Intestinal lamblia causes giardiasis in humans and animals in which the parasite lives in the small intestine.
A person becomes infected with giardiasis if they consume unwashed foods containing Giardia cysts. Coming out of the cyst, the lamb sticks 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. The vectors are mosquitoes.
Different types of leishmaniasis are associated with damage to different tissues in the body. One of the skin diseases is Pendinsky ulcer.
Coccidia
Coccidia parasitize many animals, including worms, arthropods, and fish. They cause coccidiosis diseases that cause severe damage to animal husbandry and fish farming.
Coccidia settle in the form of spores containing parasite cells.
The genus Toxoplasma belongs to the coccidia. Their representatives cause a common disease in humans such as toxoplasmosis. A person becomes infected from pets or poorly cooked meat dishes. Toxoplasmas affect many organs, including the nervous system.