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.
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This guidance document addresses how physical distancing (referred to in previous guidance documents as ‘social distancing’) can help slow down transmission.
Frequently Asked Questions on Visceral Leishmaniasis
Depuis 2010, la lutte contre le paludisme a permis de réaliser des progrès majeurs grâce à la distribution de moustiquaires, au diagnostic rapide, aux traitements à base d'artémisinine (ACT) et aux interventions préventives ciblées.
La inmunización es un servicio esencial de salud que protege a las personas susceptibles de contraer enfermedades prevenibles mediante vacunación.2 L a vacunación oportuna protege a los individuos y las comunidades, al tiempo quereduce las posibilidades de que se produzcan brotes d...e enfermedades prevenibles mediante vacunación. La prevención de un brote de una enfermedad prevenible mediante vacunación no solo salva vidas, sino que requiere menos recursosque la respuesta al brote y ayuda a reducir la carga que supone para los sistemas de salud, los cuales ya están sometidos a una fuerte presión por la pandemia de COVID-19. En sus esfuerzos por mantener los sistemas de inmunización, los países deben adoptar enfoques que respeten el principio de «no hacer daño» y limiten la transmisión de la COVID-19 durante la realización de actividades de inmunización. Las visitas para la administración de vacunas también pueden ser una ocasión para divulgar mensajes que fomenten comportamientos que reducen el riesgo de transmisión del virus de la COVID-19 y para proporcionar orientaciones sobre las medidas que deben adoptarse si se observan síntomas.
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The ICMR type 1 diabetes guidelines come at a time when the SARS-CoV-2 pandemic
has disproportionately affected people with diabetes population, exposing them to a
high risk for severe illness and mortality. Globally, diabetes was responsible for over fourmillion deaths in the year 2019. It was th...e leading cause of end-stage kidney disease, adult-onset blindness and cardiovascular diseases. Further, there was a considerable heterogeneity in the prevalence of complications and deaths associated with diabetes across the countries.
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