Final answer:
If you get severe diarrhea after drinking water from a feces-contaminated stream, you are a victim of Giardia parasites. Giardiasis, caused by Giardia parasites, spreads through the fecal-oral route and typically affects the gastrointestinal tract, leading to symptoms such as diarrhea and abdominal cramps.
Step-by-step explanation:
If you get severe diarrhea after drinking water from a feces-contaminated stream, you are a victim of Giardia parasites. These microscopic pathogens are intestinal parasites that can be transmitted through contaminated water.
Giardiasis, caused by Giardia parasites, spreads through the fecal-oral route and typically affects the gastrointestinal tract, leading to symptoms such as diarrhea and abdominal cramps.