C. diphtheriae can be biochemically differentiated from C. pseudotuberculosis by
-C. pseudotuberculosis is urease positive and is thus differentiated from C. diphtheriae. - C. pseudotuberculosis causes caseous lymphadenitis in sheep and goats. Corynebacterium - catalase positive. Oxidase positive organisms are: Pseudomonas aeruginosa Burkholderia species Vibrio Pasteurella multocida Brucella Neisseria Haemophilus spp Campylobacter Potassium tellurite agar (PTA) is the selective media used for C. diphtheriae.
Catalase test
Urease test
Oxidase test
Tellurite Reduction
Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli)