When diphtheritic inflammation begins in the respiratory tract, sore throat and fever usually develop.Prostration and dyspnea soon follow because of the obstruction caused by the membrane。

当白喉在呼起炎症时，通常有咽喉痛和发热，然后于假膜的阻碍会感到虚脱和呼困，不及时治疗可能会起窒息。