Microbiology Diphtheria toxin is produced only by those strains of C. diphtheriae that are A Glucose fermenters B Sucrose fermenters C Lysogenic for b-prophage D Of the mitis strain 💡 Explanation Diphtheria toxin is produced only by those strains of C. diphtheriae that are ✓ Correct Answer: C. Lysogenic for b-prophage