| blastocystis hominis: epidemiology and natural history. | to study the demographic profile of blastocystis hominis carriers from hamilton, canada, the regional parasitology laboratory records for 1988 were reviewed, and a prospective study on carriers was conducted to clarify the natural history of the infection and ascertain the role of b. hominis as an intestinal pathogen. retrospective analysis revealed that 8% of stool samples harbored b. hominis. the median age of the carriers was 37 years; 55% were female. prospective analysis of 139 patients sho ... | 1990 | 2401797 |