TABLE 3.
Species of microsporidia known to infect immunocompetent humans
| Species | Clinical manifestation in immunocompetent host | In vitro culture achieved |
|---|---|---|
| Brachiola (Nosema) algerae | Keratoconjunctivitis | + |
| Encephalitozoon intestinalis | Self-limiting diarrhea | − |
| Enterocytozoon bieneusi | Self-limiting diarrhea | − |
| Nosema ocularum | Keratitis | − |
| Vittaforma corneae | Keratitis | + |
| Microsporidium ceylonensisa | Keratitis | − |
| Microsporidium africanuma | Keratitis | − |
a
These are poorly described species and have been arbitrarily assigned to the genus Microsporidium, and the true taxonomic affinities of these two species have not been established.