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Whooping cough

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Whooping cough

Whooping cough — the acute infectious disease of mainly children's age which is characterized by attacks of spasmodic cough.

Etiology. The activator — Bordetella pertussis.

Epidemiology. An infection source — the patient, the most contagious in catarral and at the beginning of the spasmodic period. Infection occurs in the airborne way. Existence of a carriage is proved. The susceptibility is big since the neonatality period.

Pathogeny. Entrance gate are upper respiratory tracts. The hemophilic stick occupies a mucous membrane of a throat, bronchial tubes, bronchioles, air cells and influences an organism the toxin. Under the influence of toxin the expressed tendency to a generalized vascular spasm of small bronchial tubes, a glottis with spastic disturbance of breath and tonic spasms of cross muscles develops. In emergence of complications the secondary bacterial flora plays a role.

Clinic. The incubation interval lasts from 3 to 14 days. The first clinical display of an illness is the cough which does not have in an initial stage of characteristics. The general state remains a little changed, temperature — normal. Cough gradually accrues, gaining persistent, pristupoobrazny character. During this period (2 — 3 weeks) attacks become typical. They consist of a number of the exhaling pushes following one after another which are replaced the convulsive whistling breath (reprises) after which exhaling pushes follow again. Their number can be from 2 — 3 to 20 and more. The fit of coughing comes to an end with allocation of a viscous viscous phlegm. The person takes a characteristic form — it reddens, cervical veins bulk up, dacryagogue tongue is put out, develops. Over lungs the tympanic shade of percussion tone, shortening in interscapular area, scattered dry and wet rattles are defined. The vasospasm, hemorrhages, tachycardia, increase of arterial pressure, the general concern, hyperexcitability, sleep disorder are noted, encephalopathy is possible. At children of early age whooping cough proceeds without repriz, in the form of the persuasive tussive pushes which are followed by cyanosis, and sometimes and an apnoea — an apnoea. The arising asphyxia is the reason of spasms and encephalopathies. At imparted whooping cough proceeds in the form of rare attacks of spasmodic cough or long cough without repriz, intoxication phenomena.

"Skin leushmaniosis   Coccidioidomycosis"