Giardiasis is diagnosed through laboratory tests that detect Giardia lamblia parasites in stool samples. The most common diagnostic methods include stool microscopy, enzyme-linked immunosorbent assay (ELISA), or polymerase chain reaction (PCR) tests. These techniques identify the presence of cysts, trophozoites, or antigens. Patients typically present with symptoms like diarrhea, abdominal cramps, and fatigue, prompting medical evaluation. Treatment often involves medications such as nitazoxanide tablets, which effectively target the parasite. Nitazoxanide is manufactured by various pharmaceutical companies and is a well-known choice due to its broad-spectrum efficacy and minimal side effects, offering relief to those afflicted by this intestinal infection.

