
Diphtheria
- localized infection of mucous membranes or skin caused by toxigenic strains of Corynebacterium diphtheriae; it is characterized by the presence of a pseudomembrane at the site of infection; diphtheria toxin, produced by C. diphtheriae, can cause myocarditis, polyneuritis, and other systemic toxic effects.

Faucial diphtheria

Nasopharyngeal diphtheria

Anterior nasal diphtheria

Laryngeal diphtheria

Other specified diphtheria

Conjunctival diphtheria

Diphtheritic myocarditis

Diphtheritic peritonitis

Diphtheritic cystitis

Cutaneous diphtheria

Other specified diphtheria

Diphtheria unspecified
- localized infection of mucous membranes or skin caused by toxigenic strains of Corynebacterium diphtheriae; it is characterized by the presence of a pseudomembrane at the site of infection; diphtheria toxin, produced by C. diphtheriae, can cause myocarditis, polyneuritis, and other systemic toxic effects.