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===Diagnosis===
===Diagnosis===
*
*Colony characteristics@
**''C. bovis'': lipophilic bacterium; small, white, dry, non-haemolytic colonies on plates inoculated with bovine milk
**''C. kutscheri'': white colonies; occasionally haemolytic
**''C. pseudotuberculosis'': small, white coloniess surrounded by narrow zone of complete haemolysis; colonies become dry and cream-coloured
**''C. renale'': small, non-haemolytic colonies after 24 hours; pigment produced after 48 hours
*Biochemical reactions:
**Certain strains of ''C. pseudotuberculosis'' reduce nitrates
**All pathogenic strains except ''C. bovis'' produce urease
*Enhancement of haemolysis produced by ''C. pseudotuberculosis'' when inoculated across a streak of ''Rhodococcus equi''