A genus of gram-negative bacteria in the genus ACTINOBACILLUS, which is pathogenic for HORSES and PIGS.

Synonyms: Bacterium pyosepticum, Shigella equirulis, Bacillus pyosepticus equi, Shigella viscosa, Bacterium viscosum equi, Shigella equi, Bacillus equirulis, Bacillus nephritidis equi, Shigella equuli, Eberthella viscosa, Bacillus pyosepticus, txid718, Actinobacillus equuli, Bacterium pyosepticum viscosum, Bacterium equi, Bacillus equuli