manual de aplicación de la OMS
In preparing this paper, the Pharmacovigilance Group of the Pan American Health Organization’s Pan American Network for Drug Regulatory Harmonization (PANDRH) adopted the perspective of PAHO/WHO, which considers Pharmacovigilance, an essential component of public health programs. Its intention was... to facilitate the development of pharmacovigilance systems in the Region of the Americas and improve, strengthen, and promote the adoption of good practices to improve safety for patients and the general population, based on the needs of the Region.
Document also available in Spanish and Portuguese!
more
Introduction
Chapitre A.4
Edition en français Traduction : Eleanor O’Boyle
Sous la direction de : Priscille Gérardin
Avec le soutien de la SFPEADA
Diphtheria is caused by Corynebacterium species, mostly by toxin-producing Corynebacterium diphtheriae and rarely by toxin-producing strains of C. ulcerans and C. pseudotuberculosis. The most common type of diphtheria is classic respiratory diphtheria, whereby the exotoxin produced characteristicall...y causes the formation of a pseudomembrane in the upper respiratory tract and damages other organs, usually the myocardium and peripheral nerves. Acute respiratory obstruction, acute systemic toxicity, myocarditis and neurologic complications are the usual causes of death. The infection can also affect the skin (cutaneous diphtheria). More rarely, it can affect mucous membranes at other non-respiratory sites, such as genitalia and conjunctiva.
C. diphtheriae is transmitted from person to person by intimate respiratory and direct contact; in contrast, C. ulcerans and C. pseudotuberculosis are zoonotic infections, not transmitted person-to-person. The incubation period of C. diphtheriae is two to five days (range 1– 10 days). A person is infectious as long as virulent bacteria are present in respiratory secretions, usually two weeks without antibiotics, and seldom more than six weeks. In rare cases, chronic carriers may shed organisms for six months or more. Skin lesions are often chronic and infectious for longer periods. Effective antibiotic therapy (penicillin or erythromycin) promptly terminates shedding in about one or two days.
more