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。

当白喉在呼吸道引起炎症时，通常有咽喉热，然后于假膜会感到虚脱呼吸困难，如果不及时治疗可能会引起窒息。