Table 1.

Microsporidia species identified in humans

Species	Site(s) of Infection	Other Hosts
Anncaliia (syns. Nosema and Brachiola) algerae	Eye, skeletal muscle, skin	Mosquito
Anncaliia (syns. Nosema and Brachiola) connori	Systemic	Unknown
Anncaliia (syns. Nosema-like and Brachiola) vesicularum	Skeletal muscle	Unknown
Encephalitozoon (syn. Nosema) cuniculi	Systemic, eye, respiratory tract, urinary tract, liver, peritoneum, brain, intestine	Mammals
Encephalitozoon hellem	Systemic, eye, respiratory tract, urinary tract, intestine	Birds, fruit bats
Encephalitozoon (syn. Septata) intestinalis	Systemic, intestine, biliary tract, respiratory tract, bone, skin	Mammals
Enterocytozoon bieneusi	Intestine, biliary tract, respiratory tract, urinary tract	Mammals, birds
Microsporidium africanum (syn. Nosema sp.)	Eye	Unknown
Microsporidium ceylonensis (syn. Nosema sp.)	Eye	Unknown
Nosema ocularum	Eye	Unknown
Pleistophora ronneafiei (syn. Pleistophora sp.)	Muscle	Unknown
Trachipleistophora anthropopthera	Systemic, eye, brain	Unknown
Trachipleistophora hominis	Systemic, muscle, eye	Unknown
Vittaforma corneae (syn. Nosema corneum)	Eye, urinary tract	Unknown