| streptococcus equi | species | bacteria | bacteria | species | 1336 |
| streptococcus equi subsp. equi | subspecies | bacteria | bacteria | subspecies | 148942 |
| streptococcus equi subsp. zooepidemicus | subspecies | bacteria | bacteria | subspecies | 40041 |
| streptococcus equi subsp. zooepidemicus cy | no rank | | | no rank | 1403449 |