Question

The most common carrier of communicable diseases is:

• A. Ant
• B. Housefly
• C. Dragonfly
• D. Spider

Answer 1

The correct option is B

Housefly

The correct option is Option B:

Explanation for correct option:

Option B:

1. A vector is an organism that does not cause disease itself but spreads the infection by conveying pathogens from one host to another.
2. A single female housefly can also lay up to 500 eggs in her single lifetime, in various batches of about 75 to 150.
3. Houseflies also play a crucial ecological role in breaking down and recycling organic matter.
4. The houseflies can also fly for several kilometers from their breeding places, carrying a diverse variety of organisms on the hairs, mouthparts, vomits, and feces. Housefly also comes in contact with waste products & eatables.
5. When it flies from wastes to the eatables, it then transports bacterial agents from wastes to eatables. Due to such consumption of eatables, the persons infected with microbes of various diseases, a person gets sick. For example cholera, and leprosy.

Explanation for incorrect options:

Option A:

1. Ants act as a vector in spreading bacterial and fungal infections but not as significantly as mosquitoes and flies.

Option C:

1. Dragonflies are not quite prominent vectors instead they are aquatic predators.

Option D:

1. Spiders do not act as vectors in the transmission of any disease.

Final Answer: The most common carrier of communicable diseases is Housefly