Bacteria

Staphylococcus spp.

Mycobacteria spp.

Streptococci

Corynebacterium species

Rhodococcus equi

Actinomycetes

Listeria species

Erysipelothrix rhusiopathiae

Bacillus species

Clostridium species

Enterobacteriaceae

Pseudomonas aeruginosa and Burkholderia species

Aeromonas species, Plesiomonas shigelloides and Vibrio species

Actinobacillus species

Pasteurella species and Mannheimia haemolytica

Francisella tularensis

Haemophilus species

Taylorella equigenitalis

Bordetella bronchiseptica and Bordetella avium

Moraxella bovis

Brucella species

Campylobacter species

Lawsonia intracellularis

Spirochaetes

Pathogenic anaerobic non-spore-forming Gram-negative bacteria

Mycoplasmas

Chlamydia and Chlamydophila species

Rickettsiales