Question

Why are houseflies not considered to be biological vectors?

• A. They do not spread diseases
• B. They are pathogens.
• C. They do not transmit the disease directly
• D. They transmit the disease directly

Answer 1

The correct option is A They do not spread diseases

The vector is the agent which is responsible for the transmission of the diseases by interaction with the host like biting. The housefly carries many pathogens while visiting areas in search of food. These pathogens are transmitted through the contaminated food or other objects when the flies visit these objects. The houseflies are responsible for transmission of the pathogens and not diseases.

Thus, the correct answer is option A.