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Presumptive Evidence for Blastocystis hominis as a Cause of Colitis

Arthur R. Russo, MD; Sarah L. Stone, MD; Mary Ellen Taplin, MD; Howard J. Snapper; Gary V. Doern, PhD
Arch Intern Med. 1988;148(5):1064. doi:10.1001/archinte.1988.00380050070012.
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• A patient with persistent diarrhea was found to have biopsy-proved colitis with large numbers of the protozoan Blastocystis hominis present in stool. Extensive evaluation failed to reveal any other potential etiologic agent of acute colitis. Following treatment with a course of metronidazole, the patient became asymptomatic, B hominis was no longer present in stool, and results of a repeated biopsy were normal. These observations are consistent with the role of B hominis as a gastrointestinal pathogen.

(Arch Intern Med 1988;148:1064)


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