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Infection caused by the Giardia parasite
Parasitic infections produce a wide, often nonspecific set of symptoms that depend on the parasite type, site of infection and intensity of infestation; common red flags include gastrointestinal distr...
Common human parasitic infections produce a predictable cluster of symptoms—primarily gastrointestinal distress, unexplained itching (especially perianal), fatigue and anemia, and skin or systemic sig...
Clinicians diagnose intestinal parasitic infections using a ladder of tests: microscopic stool examination (ova and parasite, O&P), antigen assays, molecular methods, and—when needed—endoscopy or biop...