Etiology:

Most common infectious causes in farm animals are listed below:

Cattle: Alpha-hemolytic streptococci, Actinomyces or Corneybacterium pyogenes, Micrococcus, Staphylococcus spp., Pseudomonas spp., Clostridium chauvoei, Mycoplasma mycoides, Erysipelothrix rheusopathiae (insidiosa– rare)

Horses: Actinobacillus equuli, Streptococcus equi, Streptococcus zooepidemicus, Pasteurella spp., Pseudomonas spp., Migrating larvae of strongylus

Sheep and Pig: Erysipelothrix rheusopathiae (insidiosa), Streptococcus equisimilis, Streptococcus dysgalactia, Streptococcus suis, Escherichia coli, A. pyogenes.