Parasites · Protozoan (protist)

Dientamoeba fragilis

Contested A common protist of genuinely contested pathogenicity — frequently found in healthy, asymptomatic people, occasionally linked to GI symptoms.

Associated with these conditions

Irritable bowel syndrome (IBS) Mixed

Sometimes implicated in IBS-like symptoms, but just as often found in healthy people — causation is unproven.

Preliminary studies conflict

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