Microbiology True about corynebacterium diphtheriae is all except- A Deep invasion is not seen B Elek's test is done for toxigenicity C Metachromatic granules are seen D Toxigenicity is mediated by chromosomal change 💡 Explanation True about corynebacterium diphtheriae is all except- ✓ Correct Answer: D. Toxigenicity is mediated by chromosomal change