what toxin is secreted by c.diphtheria
Pathology Associated with Toxigenicity. Diphtheriae toxin, which is secreted by toxigenic strains of C. diphtheriae, is a single polypeptide of M r 58,342. Toxigenic strains of C. diphtheriae carry the tox structural gene found in lysogenic corynebacteriophages Î² tox + , Î³ tox + , and Ï tox + .