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