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Each of the victims suffered from "malaise, paleness, fatigue, anorexia, dyspnoea and weight loss," accompanied by a trance-like, delirious state, according to the study.

The oedematous condition causes a functional paralysis of the vocal cords, together with marked dyspnoea on inspiration.

Two hours later the boy became conscious and complained of great thirst and dyspnoea.

The seizure may be accompanied by convulsions, and death has occurred from dyspnoea.

The little patient was a girl of about four years of age, who on the fifth or sixth day of a severe laryngeal diphtheria developed symptoms of laryngeal stenosis, with great dyspnoea.