6. Giardiasis: The Protozoan Pillager of Nutrients
Giardiasis, caused by the protozoan parasite Giardia lamblia, is a fascinating example of how microscopic entities can dramatically alter our body’s functions. This tiny invader primarily targets the small intestine, leading to a myriad of digestive issues, with malabsorption being a major concern.
Upon entering the human body, often through contaminated water or food, Giardia adheres to the intestinal walls. It’s intriguing to note that this parasite has a unique two-stage life cycle: the trophozoites (active, feeding stage) and the cysts (dormant, hardy stage). The trophozoites attach themselves to the intestinal lining, causing damage and hindering nutrient absorption.
Common symptoms include diarrhea, stomach cramps, and nausea. What’s striking is the frothy nature of the diarrhea, which is filled with fats due to impaired absorption. Moreover, giardiasis can also lead to lactose intolerance, which might persist even after the infection has been cleared. (6)
