<unk>  occurs worldwide, especially in tropical and subtropical areas.  Infection occurs in immunodepressed individuals, and outbreaks have been reported in institutionalized groups in the United States.
Isosporiasis epidemiology and demographics
Microsporidiosis epidemiology and demographics
Leishmaniasis epidemiology and demographics
Schistosomiasis epidemiology and demographics
Trichinosis epidemiology and demographics
Amoebiasis epidemiology and demographics
Ancylostomiasis epidemiology and demographics
Trichomoniasis epidemiology and demographics