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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Namibia recorded its first COVID-19 case on 14 March 2020, with cumulative cases reaching 15,773 and 118 deaths by 10 December 2020. Namibia has done relatively well to contain the outbreak.
However, positivity rates have shown a consistent increase above 5 percent in quarter 4 of 2020, necessitati...ng renewed attention to surveillance and outbreak control in 2021.
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Clinical Pharmacology: Advances and Applications, 2025:17 29–47
In 2007, WHO warned that infectious diseases are emerging and re-emerging at a rate that has not been seen before. The potential for infectious diseases to spread rapidly results in high morbidity and mortality, causing a potential global public health treat of major concern.
Several factors are ...contributing to the (re)emergence of infectious diseases such as population growth, living in close contact with animals, frequent travelling, poverty, destructive ecological changes due to economic development and land use and climate change result in global warming.
Especially Africa is at a threat for (re)emerging infectious diseases due to the huge population growth (expected to reach 2.5 billion by 2050) with rapid urbanisation. Additionally, people across and beyond the continent are excessively mobile which is combined with a weak health system. Moreover, the risk of (re)emerging infectious disease is further heightened by three newly adopted continental initiatives: African Continental Free Trade Area, Free Movement of Persons and African Passport and Single African Air Transport Market.
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This guidance is intended to be one stop shop to improve the quality and effectiveness of health interventions in emergency, to respond to the most frequent scenarios and conditions.
The main document contains the most common elements to be found in emergencies. As much as possible they are one pag...e tables on one topic each with the key elements that ensure quality in column 2 of the table. Column 1 is about key information. Column 3 contains suggested indicators and column 4 helps decision making. This is a document to consult as needed, not really to read from front to last page
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nterim guidance, first issued 25 January 2021, updated 15 June 2021, updated 19 November 2021, updated 23 February 2022, updated 18 August 2022