Which statement best describes vector-borne transmission?

Which statement best describes vector-borne transmission?

• A. Transmission by a living organism that carries microorganisms
• B. Direct contact with an infected person
• C. Inhalation of droplets
• D. Ingestion of contaminated water

Answer: (A)

Vector-borne transmission involves a living organism that acts as an intermediary to carry pathogens from one host to another. A vector, such as a mosquito or tick, harbors the microorganism and often supports its development or replication, enabling transmission when the vector bites or feeds on a new host. This distinguishes it from other routes: direct contact requires touch between people, inhalation of droplets involves respiratory droplets from an infected person, and ingestion of contaminated water involves a fecal-oral or waterborne route. Thus, the description of a living organism that carries microorganisms best captures how these pathogens are moved between hosts.

Vector-borne transmission involves a living organism that acts as an intermediary to carry pathogens from one host to another. A vector, such as a mosquito or tick, harbors the microorganism and often supports its development or replication, enabling transmission when the vector bites or feeds on a new host. This distinguishes it from other routes: direct contact requires touch between people, inhalation of droplets involves respiratory droplets from an infected person, and ingestion of contaminated water involves a fecal-oral or waterborne route. Thus, the description of a living organism that carries microorganisms best captures how these pathogens are moved between hosts.