Blastocystis spp (B. hominis)

• Blastocystis hominis is comprised of a number of different subtypes with varying degrees of pathogenicity.

• Treatment recommended if symptomatic and other causes (infectious/non-infectious) of diarrhea have been excluded.

• Little data available on optimal therapy.

Symptoms

• diarrhea
• abdominal pain and cramping
• nausea

Asymptomatic

Symptomatic