List of organisms that stain positively with the periodic acid Schiff reagent
| Actinomycetes |
| Atypical mycobacteria |
| Mycobacterium avium intracellulare 55 |
| Mycobacterium genavense |
| Bacillus cereus 56 |
| Corynebacterium spp |
| Fungi |
| Histoplasma |
| Rhodococcus equi57 (previously known as Corynebacterium equi) |