In a completely and adequately immunized child against Diphtheria, the throat swab was collected. It showed the presence of Corynebacterium diphtheriae like organisms on Albe staining. These organisms can have one of the following propeies on fuher laboratory processing
It can grow on Potassium tellurite medium Positive Elek's gel precipitation test It can be pathogenic to experimental guinea pigs It can produce cytotoxicity in tissue cultures