• 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)
Russo AR, Stone SL, Taplin ME, Snapper HJ, Doern GV. Presumptive Evidence for Blastocystis hominis as a Cause of Colitis. Arch Intern Med. 1988;148(5):1064. doi:10.1001/archinte.1988.00380050070012