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Q. Which all of the following are vector hosts?

  • (A) Sand fly, Tse tse fly, House fly, Culex
  • (B) Tse tse fly, Trypansoma, Sand fly, Leishmania
  • (C) House fly, Plasmodium, Monocystis, Culex
  • (D) Bed bug, Silver fish, Ratflea, Entamoeba
  • Correct Answer - Option(A)
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  • Filed under category Biology
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Explanation by: Admin

A vector host is an organism (usually an insect or arthropod) that transmits pathogens from one host to another.

(A) Correct:

  • Sand fly – Transmits Leishmania (causes Leishmaniasis)
  • Tse tse fly – Transmits Trypanosoma (causes Sleeping Sickness)
  • House fly – Transmits various bacteria causing diseases like dysentery and typhoid
  • Culex – A mosquito that transmits filariasis and Japanese encephalitis

Why other options are incorrect:

  • (B) contains pathogens (Trypanosoma, Leishmania), not vector hosts.
  • (C) contains parasites (Plasmodium, Monocystis) and not all vectors.
  • (D) includes Entamoeba (a protozoan) and silverfish (not a disease vector).

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