Q.36 Match the disease (Column I) with its biological vector (Column II).
Column I Column II
P. Chagas disease 1. Tsetse flies
Q. Trypanosomiasis 2. Mosquitoes
R. Leishmaniasis 3. Sandflies
S. Yellow Fever 4. Reduviid bugs
(A) P-4; Q-1; R-3; S-2
(B) P-2; Q-3; R-4; S-1
(C) P-1; Q-4; R-3; S-2
(D) P-3; Q-1; R-2; S-4
Chagas disease spreads via Reduviid bugs, while other listed diseases have distinct insect vectors. The correct match aligns each pathogen with its primary biological transmitter.
Correct Answer
Option (A) P-4; Q-1; R-3; S-2 is accurate. Chagas disease (P) matches Reduviid bugs (4), Trypanosomiasis (Q) with Tsetse flies (1), Leishmaniasis (R) with Sandflies (3), and Yellow Fever (S) with Mosquitoes (2). This pairing reflects established parasitology facts from sources like WHO and GATE solutions.
Disease-Vector Matches
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Chagas Disease (P-4): Caused by Trypanosoma cruzi, transmitted by triatomine insects called Reduviid bugs (kissing bugs), which defecate near bite wounds to release parasites.
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Trypanosomiasis (Q-1): African sleeping sickness from Trypanosoma brucei, spread by Tsetse flies (Glossina spp.) injecting parasites during blood meals.
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Leishmaniasis (R-3): Protozoan disease (Leishmania spp.) vectored by female Sandflies (Phlebotomus or Lutzomyia), which carry promastigotes.
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Yellow Fever (S-2): Viral infection transmitted by Aedes or other Mosquitoes, with urban cycles involving human-mosquito contact.
Option Analysis
| Option | P Match | Q Match | R Match | S Match | Status |
|---|---|---|---|---|---|
| (A) | 4 (Correct) | 1 (Correct) | 3 (Correct) | 2 (Correct) | ✅ Correct |
| (B) | 2 (Wrong: Mosquitoes not for Chagas) | 3 (Wrong: Sandflies for Leishmania) | 4 (Wrong) | 1 (Wrong) | ❌ Incorrect |
| (C) | 1 (Wrong: Tsetse for Trypanosomiasis) | 4 (Wrong) | 3 (Correct) | 2 (Correct) | ❌ Incorrect |
| (D) | 3 (Wrong: Sandflies for Leishmania) | 1 (Correct) | 2 (Wrong) | 4 (Wrong) | ❌ Incorrect |
Only option (A) correctly pairs all diseases with their vectors, as verified in GATE BT 2024 solutions and scientific literature.
