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A bite of tsetse fly may pass (to humans)
A. Leishmania donovani
B. Trypanosoma brucei
C. Entamoeba histolytica
D. Plasmodium vivax

Last updated date: 13th Jun 2024
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Hint: Tsetse flies are a fly that is generally found in Africa, this looks different with its forward projecting piercing proboscis found on the head that is capable of puncturing the skin. They rapidly feed on the blood of humans, domestic animals, and wild games.

Complete answer: Leishmania donovani is a species of intracellular parasites that belongs to genus Leishmania, which causes a disease leishmaniasis or generally known as kala-azar. It infects the mononuclear phagocyte system including spleen, liver and bone marrow. This infection is transmitted by a sandfly that belongs to the genus Lutzomyia.
Trypanosoma brucei is a member of the salivary trypanosome. This causes African trypanosomiasis or generally known as sleeping sickness in humans. Trypanosoma is transmitted into humans or other mammals by an insect vector the tsetse fly or tik-tik fly which belongs to genus Glossina.
Entamoeba histolytica belongs to the species Entamoeba, it is an anaerobic parasitic amoeozon. It lives in human and other living organisms as a parasite and causes amoebiasis. E. histolytica is transmitted by ingestion of food and water, contaminated with feces containing E. histolytica cysts.
Plasmodium vivax is a human parasite belonging to protozoa, which causes malaria. Apart from P. vivax some other species of Plasmodium also causes malaria like P. falciparum. Plasmodium parasite is transferred into human blood through an Anopheles mosquito bite.
So, the correct answer is “Option B”.

When these fly bites red sores are formed on the skin, and after a few weeks, a person can experience fever, swollen lymph glands, aching muscles, and joints, headaches, and irritability. In the advanced phase, the disease attacks the central nervous system and the infected person can experience a change in its personality, like an alteration in the biological clock confusion, slurred speed, seizures, and difficulty in walking and talking.