Giarditis, more commonly referred to as giardiasis, is an intestinal infection caused by the Giardia lamblia parasite. It is often transmitted through contaminated water or food and can lead to symptoms such as diarrhea, abdominal cramps, bloating, and nausea. While giardiasis can resolve on its own, treatment with antiparasitic medications is often recommended to alleviate symptoms and expedite recovery. Proper hygiene and sanitation practices can help prevent infection.