Diphtheria is an acute infectious disease caused by corynebacteria, characterized by inflammation with fibrin membrane formation at the site of penetration of the agent, exotoxins entering the blood causing poisoning of the body with serious complications.

Diphtheria is an acute infection caused by the bacterium Corynebacterium diphtheriae. The disease can lead to serious complications such as pneumonia, myocarditis, arrhythmia, and even death.