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.
translation.pt: A difteria é uma doença aguda causada por estirpes toxigénicas de Corynebacterium diphtheriae (e, em alguns casos, de Corynebacterium ulcerans) que colonizam as membranas mucosas.