Blastocystis hominis is a microscopic organism that may be found in the stools of healthy people who aren't having any digestive symptoms. Blastocystis hominis is also sometimes found in the stools of people who have diarrhea, abdominal pain or other gastrointestinal problems.
Symptoms: Signs and symptoms that might be associated with blastocystis include: Diarrhea Nausea Abdominal cramps Bloating Excessive gas (flatulence) Hives Loss of appetite Fatigue
Treatment:Treatment of Blastocystis infection remains a complicated issue. Because there is still a great deal of debate about the true pathogenicity of Blastocystis, there is still much debate about the need for treatment. Further knowledge about the genotyping and subtyping of Blastocystis and the impact that various subtypes may have on pathogenicity and antimicrobial efficacy is still being sought . In a symptomatic patient, isolation of cysts in stool specimens should trigger a thorough evaluation for other causes of the patient’s gastrointestinal tract complaints, given the possibility for coinfection with other pathogens.
statistics:B. hominis was detected in stool samples of 99 patients (38%). The isolation rate varied highly between the different groups. Homosexual men (43%; odds ratio (OR), 2.1; p = 0.01) had a higher detection rate than patients from other risk groups (26%), and patients with acquired immunodeficiency syndrome (46%; OR, 1.8; p = 0.03) were more likely to carry B. hominis than patients in earlier stages of their HIV infection (32%). An association with clinical symptoms was not evident. Presence of B. hominis, however, was frequently associated with the concurrent isolation of other enteric pathogens or apathogenic parasites.