Question

Mosquito is not a vector for a disease in the following

• A. Malaria
• B. Typhoid
• C. Dengu
• D. Elephantitis

Answer 1

The correct option is B

Typhoid

The correct option is B.

Explanation of the correct option:

1. Typhoid fever is caused by the bacteria Salmonella typhimurium (S. typhi), which is spread by contaminated food, drinks, and drinking water.
2. Other ways to get typhoid fever include using a bacteria-infested toilet and touching your lips before washing your hands.
3. Eating seafood that has been polluted by infectious faeces or urine.

Explanation of the incorrect options:

Option A:

1. Malaria is a parasitic disease spread by mosquitoes and is caused by Plasmodium protozoan. Humans are infected with the parasite after being bitten by infected mosquitoes.
2. Malaria is spread by the female mosquito Anopheles. The mosquitoes act as vectors in carrying the pathogen and its transmission.
3. It's both avoidable and treatable.

Option C:

1. Dengue fever is a viral infection spread by the bite of infected female Aedes mosquitos.
2. Dengue virus (DENV) has four serotypes, and you can get infected up to four times.
3. Those who are infected by the virus for the second time are at a much higher risk of acquiring the serious disease.

Option D:

1. Elephantiasis, commonly known as lymphatic filariasis, is an extremely rare mosquito-borne disease.
2. It's a parasite disease that affects the lymph nodes and lymph arteries in tropical areas.

Final answer: Mosquito is not a vector for disease typhoid.