Question:
Gambusia is a fish which is being introduced into ponds in order to check vector-borne diseases. Select the option that indicates the correct disease.
Gambusia is a fish which is being introduced into ponds in order to check vector-borne diseases. Select the option that indicates the correct disease.
Show Hint
Gambusia eats mosquito larvae, so it helps to check malaria.
Updated On: Oct 23, 2026
- Ascariasis
- Malaria
- Amoebiasis
- Typhoid
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Link the fish to the vector:
Gambusia is called the mosquito fish. It eats the larvae of mosquitoes living in water.
Female Anopheles mosquitoes carry the malaria parasite Plasmodium. Removing larvae means fewer adult mosquitoes and less malaria.
Step 2: Check the other diseases:
(A) Ascariasis is caused by the roundworm Ascaris and spreads through soil and food contaminated with eggs.
(C) Amoebiasis is caused by Entamoeba histolytica and spreads by contaminated food and water.
(D) Typhoid is caused by Salmonella typhi and spreads by contaminated food and water. None of these is spread by a vector that breeds in ponds.
Final Answer:
Option (B), Malaria.
Gambusia is called the mosquito fish. It eats the larvae of mosquitoes living in water.
Female Anopheles mosquitoes carry the malaria parasite Plasmodium. Removing larvae means fewer adult mosquitoes and less malaria.
Step 2: Check the other diseases:
(A) Ascariasis is caused by the roundworm Ascaris and spreads through soil and food contaminated with eggs.
(C) Amoebiasis is caused by Entamoeba histolytica and spreads by contaminated food and water.
(D) Typhoid is caused by Salmonella typhi and spreads by contaminated food and water. None of these is spread by a vector that breeds in ponds.
Final Answer:
Option (B), Malaria.
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