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An acute infectious inflammation of the larynx, trachea, and bronchi caused by Bordetella p.; characterized by recurrent bouts of spasmodic coughing that continues until the breath is exhausted, then ending in a noisy inspiratory stridor (the “whoop”) caused by laryngeal spasm. SYN: p. syndrome, whooping cough. [L. per, very (intensive), + tussis, cough]
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n.
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per·tus·sis (pər-tusґis) [L. per intensive + tussis] an acute contagious infection of the respiratory tract, usually seen in young children and caused by Bordetella pertussis. After an incubation period of about two weeks, there is a catarrhal stage for about two weeks, consisting of slight fever, sneezing, runny nose, and dry cough. Then comes the paroxysmal stage, lasting three to four weeks, with the characteristic paroxysmal cough that gives the condition its name: the patient has a deep inspiration followed by a series of quick, short coughs that continue until the air is expelled from the lungs to end with a long shrill, whooping inspiration because of spasmodic closure of the glottis. The last stage of disease is the convalescent stage, in which paroxysms diminish and finally cease. See also parapertussis. Called also whooping cough.Medical dictionary. 2011.