Causal organisms of sleeping sickness and kala-azar belong to which of the following groups of protozoan protists?
A
Amoeboid protozoans
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B
Flagellated protozoans
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C
Ciliated protozoans
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D
Sporozoans
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Solution
The correct option is B Flagellated protozoans Trypanosoma gambiense causes Gambian sleeping sickness. The parasite is transmitted by blood sucking tse-tse fly (Glossina palpalis).
Leishmania donovani causes kala-azar or dum-dum fever (visceral leishmaniasis). The parasite is transmitted by sandfly (Phlebotomus argentipes) and other species.
Causal organisms of both the diseases belong to flagellated protozoans under kingdom Protista.