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*Causes [[Joints - inflammatory#In Sheep|arthritis in sheep]] and [[Joints - inflammatory#In Pigs|arthritis and discospondylitis in pigs]]
*Causes [[Joints - inflammatory#In Sheep|arthritis in sheep]] and [[Joints - inflammatory#In Pigs|arthritis and discospondylitis in pigs]]
*May be involved in [[Bacterial skin infections#Systemic bacterial infections|cutaneous lesions]]
*May be involved in [[Bacterial skin infections#Systemic bacterial infections|cutaneous lesions]]
===Overview===
*Causes erysipelas in pigs and turkeys worldwide
*Occasionally infects sheep and other animals
*Causes erysipeloid, a localised cellulitis in humans
*Found in porcine tonsils - 50% of pigs are thought to be carriers
*Bacteria excreted in faeces and oronasal secretions
*Survive in soil for less than 35 days
*Present on fish
===Characteristics===
*Gram-positive, small rod (smooth form) or filamentous (rough form)
*Facultative anaerobe
*Non-motile
*Catalase negative, oxidase negative, coagulase positive
*Isolates from acute infections produce smooth colonies
*Isolates from chronic infections produce rough colonies
*Grow on nutrient agar; growth enhanced by addition of blood or serum
*Small colonies with incomplete haemolysis in 48 hours
*Hydrogen sulphide sormed along stab line in TSI agar
*Growth over wide rangs of temperatures and pH