Co-trimoxazole can be used to treat patients infected with the relatively new pathogen, Cyclospora cayetanensis (and also Isospora belli infection). Microsporidiosis remains a therapeutic challenge.

Interestingly, some of the protozoa, particularly C. parvum and Isospora belli, are associated with profoundly increased morbidity in immunocompromised patients, whereas the severity of giardiasis ...

I. belli is a small-bowel protozoon. Infection with I. belli is relatively uncommon in the developed world, but its role as an opportunistic agent in patients with AIDS has confirmed its ...