Many causative agents of human diseases are referred to as animal flagellates.
Trypanosome – the causative agent of sleeping sickness, parasitizes in human blood.
At the anterior end of the cell, a flagellum begins, which continues along the entire cell, connecting with it with a thin undulating membrane.
The carrier of the trypanosome is the tsetse fly. The disease is common in Africa. When a sick person bites, trypanosomes enter the intestines of a fly and begin to multiply there. After that, they enter the insect’s salivary glands. If such an insect bites a healthy person, then trypanosomes enter his circulatory system and cause sleeping sickness. Sleeping sickness is characterized by nervous and mental disorders, drowsiness and exhaustion of the body. This leads to the death of the person.
Leishmania – flagellate protozoa, human parasites that cause the disease – leishmaniasis.
The disease is spread by mosquitoes.
When a sick person bites, Leishmanias enter the digestive system of a female mosquito, which begin to multiply there. After that, they enter the salivary glands of the mosquito. When bitten by a healthy person, Leishmanias get into his wound. The disease is manifested by the appearance of ulcers on the skin, sometimes by damage to internal organs.
In the body of a mosquito, Leishmania have a long flagellum, spindle-shaped.
And in the human body they have a short flagellum, a round shape, they are motionless.
Giardia – flagellate protozoa parasitizing in the human intestine.
Giardia enters the human body with the use of contaminated water and food. In the human intestine, they feed on digested food. Enter the environment with faeces. Being in the human body, lamblia produce toxins that disrupt the work of internal organs.
Trichomonas are flagellate protozoa that parasitize the human intestine. They cause intestinal trichomoniasis. Trichomonas feed on bacteria living in the human intestine and cause diarrhea. Infection occurs through the use of food and water infected with Trichomonas.