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。

当白喉在吸道引起炎，常有咽喉痛发热，然后于假膜的阻碍会感到虚吸困难，如果不及治疗可能会引起窒息。