Question

select the correct answer
a fly carrying salmonella bacteria on its legs sits on the banana valerie is eating. later the same day, valerie develops an upset stomach and starts vomiting. which mode of disease transmission caused valerie to get salmonellosis?
a. oral
b. direct contact
c. vector
d. fomite
e. aerosol

Explanation:

A vector is an organism that carries pathogens from one host to another without being infected itself. Here, the fly carries Salmonella on its legs and transfers the bacteria to the banana, which Valerie eats. This matches the definition of vector-borne transmission. Other options are incorrect: oral refers to ingestion but doesn’t specify the carrier; direct contact requires physical touch between infected and susceptible individuals; fomite is an inanimate object (not a living organism like a fly); aerosol involves airborne particles.

Answer:

C. vector