A trypanosome infection would most likely be found in which species?

• A. Nonhuman primates
• B. Ruminants
• C. Birds
• D. Fish

Answer: (A)

Trypanosomes are blood-borne protozoa transmitted by insect vectors, and they infect a range of vertebrate hosts. In laboratory settings, nonhuman primates are especially at risk and commonly evaluated for trypanosome infections because of their susceptibility and their close relationship to humans, which makes these parasites a particular concern in primate colonies. Birds and fish are more typically affected by other protozoa, and while ruminants can harbor trypanosomes in many regions, the context of a lab setting makes nonhuman primates the most likely group to harbor such infections among the given options.