HOSA Foundations of Nutrition Practice Test 2026 - Free Nutrition Practice Questions and Study Guide

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Which protozoan parasite is associated with gastroenteritis and is often linked to contaminated water?

Cyclospora

Cyclospora cayetanensis is a protozoan parasite commonly linked to gastroenteritis from contaminated water. It causes cyclosporiasis, with symptoms such as watery diarrhea, abdominal cramps, nausea, and weight loss. The oocysts shed in feces can contaminate water or produce, persisting in the environment and leading to outbreaks when people ingest contaminated water. This waterborne transmission pattern is a defining feature that makes Cyclospora the best fit for the scenario.

Giardia lamblia

Toxoplasma gondii

Entamoeba histolytica