A) suck blood only from the patients suffering from kala-azar
B) convert amastigote into promastigote
C) . engulf amastigote at the time of blood sucking from the infected persons
D) inject promastigote into the body of non-infected persons at the time of blood sucking
Correct Answer: B
Solution :
Kala-azar is a slow progressing indigenous disease caused by a protozoan parasite of genus Leishmania end spread by the bite of certain types of sandflies (which is very small about one-third of the size of typical mosquito). Sandfly takes a blood meal from the patient of kala-azar and injects its macrophages infected with amastigotes \[\to \] In sandfly midgut these amastigotes gets transformed into promastigote multiply differentiate into metacyclic promastigotes and migrate to proboscis \[\to \] Amastigotes again get transferred into the skin of host (non-infected person) at the time of blood sucking.
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