While it is true that membranous laryngitis may be due to other exciting causes than the diphtheria bacillus, in actual practice almost all cases have this specific bacterium. Laryngeal obstruction, with the complex of symptoms known as croup, may, however, be due to other causes, such as spasm of the glottis, the presence of new growths or of foreign bodies in the larynx. The differentiation is, obviously, of the greatest importance, as on it will depend the appropriate treatment to be in stituted. Croup, it should be borne in mind, is but a symptomatic designation, and it may be due to any one of a number of causative influences. Symes,1 in a recent communication, describes the features of croup as follows: laryngeal stridor, cough, with a barking, "croupy" sound, a nocturnal paroxysm, great restlessness, and recession of the chest; and he considers briefly the clinical characters of the three
DIPHTHERIA, LARYNGITIS AND LARYNGISMUS. JAMA. 1900;XXXV(10):627–628. doi:10.1001/jama.1900.02460360033004
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