Giardia

Giardia is a microscopic, single-celled parasite that inhabits the small intestine of dogs, cats, and other mammals, including humans. Pets become infected by ingesting the dormant cysts of the parasite, typically found in contaminated water, food, or feces. Once ingested, the cysts release active trophozoites that attach to the intestinal lining, interfering with nutrient absorption. The most common symptom is diarrhea, which can range from mild to severe and may be intermittent. Diagnosis involves microscopic examination of fecal samples. Treatment usually involves specific antiparasitic medications. Maintaining good hygiene and providing clean water sources are important for prevention.