Which of the following diseases is NOT caused by an organism that enters the body through the gastrointestinal tract?

a. leprosy

b. polio

c. infant botulism

d. adult listeriosis

The correct answer is A

The correct answer is A) Leprosy.

Explanation:

Leprosy is not caused by organisms entering the gastrointestinal tract. The polio virus is often transmitted by drinking water contaminated with the polio virus especially in regions with low hygiene standards. Infant botulism is caused by ingesting spores of the strain C. botulinum. In the small intestine, the spores start to colonize and multiply. The cause for adult listeriosis is in most cases the ingestion of food contaminated with L. monocytogenes.