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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The objective of this manual is to guide managers of schistosomiasis and soil-transmitted helminthiases control programmes towards the elimination of these diseases as public health problems informed by evidence generated through monitoring and evaluation of these programmes. The manual complements ...the objectives outlined by the World Health Organization (WHO) in the road map for neglected tropical diseases 2021–2030 (“the road map”) (WHO, 2020a) and the monitoring and evaluation framework (WHO, 2021a), a companion document to the road map.
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Action on behalf of unaccompanied and separated children should be guided by principles enshrined in international standards. The validity of these principles has been confirmed by experience and lessons learnt from conflicts and natural disasters in recent years. The objective of the present public...ation is to outline the guiding principles which form the basis for action in this regard.
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The Myanmar National Framework seeks to achieve people-centered, inclusive, and sustainable socioeconomic development in the face of disasters triggered by natural hazards and climate change. The framework articulates a common understanding, proposes a coherent approach, and identifies potential opp...ortunities for strengthening the resilience of communities in Myanmar.
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Enhancing Men’s Role in HIV Prevention
The indicators and questions in this document are designed for use by national AIDS programmes and partners to assess the state of a country’s HIV and AIDS response, and to measure progress towards achieving national HIV targets. Countries are encouraged to integrate these indicators and questions... into their ongoing monitoring efforts and to report comprehensive national data through the Global AIDS Monitoring (GAM) process. In this way they will contribute to improving understanding of the global response to the HIV epidemic, including progress that has been made towards achieving the commitments and global targets set out in the new United Nations Political Declaration on HIV and AIDS: Ending Inequalities and Getting on Track to End AIDS by 2030, adopted in June 2021, and the linked Sustainable Development Goals.
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This practical document is available to support programmes and partners to design and implement risk communication strategies to achieve high uptake of malaria vaccination.
Snakebite envenoming constitutes a serious medical condition that primarily affects residents of rural communities in Africa, Asia, Latin America, and New Guinea. It is an occupational, environmental, and domestic health hazard that exacerbates the already impoverished state of these communities. Co...nservative estimates indicate that, worldwide, more than 5 million people suffer snakebite every year, leading to 25,000–125,000 deaths, while an estimated 400,000 people are left with permanent disabilities.
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