translation.da: Difteri er en akut sygdom, som skyldes toksinproducerende stammer af bakterien Corynebacterium diphtheriae (i nogle tilfælde også af Corynebacterium ulcerans), som vides at kolonisere slimhinderne.
translation.en: Diphtheria is an acute disease caused by toxin-producing strains of Corynebacterium diphtheriae (in some cases also by Corynebacterium ulcerans) bacteria, that is known to colonise mucous membranes.