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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Community Care Centres (CCCs) are small facilities (10 beds maximum), located within the community and run by community health workers. CCCs provide isolation facilities for Ebola patients in order to prevent further transmission of the virus within their households and communities. People with Ebol...a virus can also receive basic curative and palliative care in these centres in an environment supported by their family and communities. This document describes key principles and main considerations for implementation of a community approach.
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The WHO Cholera Vaccine Position Paper (August 2017) highlights the importance of oral cholera vaccines (OCVs) as a key tool in outbreak response and prevention, alongside water, sanitation, and hygiene (WASH) measures. It recommends OCVs for high-risk populations, endemic areas, and humanitarian cr...ises, emphasizing their effectiveness in reducing cases and mortality. The paper discusses two types of OCVs (Dukoral®, Shanchol™, Euvichol®) and supports the WHO-managed vaccine stockpile for rapid deployment in cholera-prone regions.
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The Integrated Management of Adolescent/Adult Illness (IMAI) approach
23 Dec 2020. The aim of this document is to provide an update on the knowledge surrounding the role of children in the transmission of SARS-CoV-2 and the role of schools in the COVID-19 pandemic, based on the experience in the EU from August–December, 2020. This document also addresses transmissio...n to and from staff in school settings, school-related mitigation measures including risk communication, testing, contact tracing and the efficacy of partial and full school closures. This document draws upon and updates evidence presented in the previous report from ECDC on this topic, which was published on August 6, 2020
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African Journal of Emergency Medicine
Volume 11, Issue 1, March 2021, Pages 165-170
A new respiratory infectious disease, COVID-19, caused by a new coronavirus called SARS-CoV-2, emerged in early December 2019. Since then, the virus has spread to India and 106 other countries in Asia, Europe, North America, Africa, and Oceania. On March 11, the World Health Organization (WHO) decl...ared the outbreak a pandemic, which has since rapidly evolved. As an economic hub with substantial global connectivity and movement of people and goods, India is directly impacted by the COVID-19 pandemic. Although it is too early to gauge the full spectrum of the outbreak’s social and economic impacts, COVID-19 has already caused lockdowns in China, Korea, and in many countries in Europe, and in some states of India, suspension of schools and universities, disruption of food systems and other supply chains, as well as a slowdown in trade between India and rest of the world.
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En Paraguay, la vacunación contra COVID-19 inició el 22 de febrero de 2021. Se han autorizado un total de siete vacunas: Bharat-Covaxin, Moderna, Pfizer-BioNTech, AstraZeneca, Sinopharm, Sputnik V- Gamaleya y CoronaVac-Sinovac. Los grupos prioritarios de vacunación están definidos según el Plan... Nacional de Vacunación contra COVID-19 en Paraguay
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Scientific Brief, 17 June 2020
This real-time learning process was carried out in order to identify the gaps and needs within World Vision’s current Ebola Virus Disease (EVD) response in Sierra Leone and to inform World Vision on how other surrounding countries (specifically those with national offices such as Mali, Ghana, Nig...er, Mauritania, Senegal and Chad) should prepare for a possible Ebola outbreak.
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20 YEARS OF STRATEGIC HIV AND PUBLIC HEALTH DATA . beThe completion of the 6th South African National HIV Prevalence, Incidence and Behaviour Survey (SABSSM) report, coincides with the celebration of 30 years of democracy in South Africa; and marks 20 years of conducting nationally representative ho...usehold-based surveys by the Human Sciences Research Council (HSRC), its collaborators and donors. Since its inception in 2002, the SABSSM series has emerged as one of the HSRC’s leading scientific contributions to the country’s HIV and AIDS response (1), providing essential data to monitor the HIV epidemic, the impact of the HIV program in South Africa, and to inform strategies for epidemic control in the National Strategic Plan for HIV, TB and STIs (NSP), now in its fifth edition. Using scientific evidence from SABSSM and other key sources, the NSP guides the country’s response, under the leadership of the South African AIDS Council (SANAC) and the National Department of Health (NDoH), with focus on equitable access to biomedical interventions, addressing the structural and social behavioural drivers of the epidemic, and targeting populations disproportionately affected by HIV; such as, black Africans, key populations and adolescent girls and young women (AGYW) aged 15–24 years (2).
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For COVID-19, as for many infectious diseases, the true level of transmission is frequently underestimated because a substantial proportion of people with the infection are undetected either because they are asymptomatic or have only mild symptoms and thus typically fail to present at healthcare fac...ilities. There may also be neglected or under-served segments of the population who are less likely to access healthcare or testing. Under-detection of cases may be exacerbated during an epidemic, when testing capacity may be limited and restricted to people with severe cases and priority risk groups (such as frontline healthcare workers, elderly people and people with comorbidities). Cases may also be misdiagnosed and attributed to other diseases with similar clinical presentation, such as influenza.
Differences in mortality between groups of people and countries are important proxy indicators of relative risk of death that guide policy decisions regarding scarce medical resource allocation during the ongoing COVID-19 pandemic. This document is intended to help countries estimate CFR and, if possible, IFR, as appropriately and accurately as possible, while accounting for possible biases in their estimation
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