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 quick guide offers basic information about COVID-19, the Sinovac-CoronaVac COVID-19 vaccine and what to
expect following vaccination: ...
Recency assays use one or more biomarkers to identify whether HIV infection in a person is recent (usually within a year or less) or longstanding. Recency assays have been used to estimate incidence in representative cross-sectional surveys and in epidemiological studies to better understand the pat...terns and distributions of new and longstanding HIV infections.
This technical guidance outlines best practices regarding the appropriate use of HIV recency assays for surveillance purposes and updates 2011 technical guidance from the World Health Organization (WHO) and the Joint United Nations Programme on HIV/AIDS (UNAIDS) on the use of HIV recency assays.
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Q5: What is the added advantage of doing an electroencephalography (EEG) in people with convulsive epilepsy in non- specialist settings in low and middle income countries?
The WHO COVID-19 Clinical management: living guidance contains the Organization’s most up-to-date recommendations for the clinical management of people with COVID-19. Providing guidance that is comprehensive and holistic for the optimal care of COVID-19 patients throughout their entire illness is ...important. The latest version of this living guideline is available in pdf format (via the ‘Download’ button) and via an online platform, and is updated regularly as new evidence emerges. No further updates to the previous existing recommendations were made in this latest version.
This updated (fifth) version contains 16 new recommendations for the rehabilitation of adults with post COVID-19 condition (see Chapter 24)
This updated (fourth) version contains three new recommendations regarding hospitalized patients with severe or critical COVID-19
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On 9 February 2021, a first webinar entitled “Expanding our understanding of Post COVID-19 condition” was held under the auspices of WHO and in consultation with the International Severe Acute Respiratory and Emerging Infection Consortium(ISARIC), Global Research Collaboration for Infectious Dis...ease Preparedness (GloPID-R), National Institutes of Health/National Institute of Allergy and Infectious Diseases(NIH/NIAID), Long Covid SOS and patient representatives.
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As of 12 December 2022, over 645 million people worldwide have been diagnosed with COVID-19, with over 6.6 million deaths (4).
The Omicron variant, which emerged in late November 2021, and its subvariants, are now the dominant circulating viruses, contributing to the ongoing surge in several countr...ies (4). Vaccination has substantially reduced case numbers and hospitalizations in many countries,but limitations in global access to vaccines mean that many populations, including those in low- and middle-income countries, remain vulnerable. Even in vaccinated individuals, uncertainties remain about duration of protection and efficacy, and the degree of crossprotection with new variants.
There remains a need for more effective treatment and management for those affected by COVID-19. The pandemic – and the
explosion of both research and misinformation – has highlighted the need for trustworthy, accessible and regularly updated living
guidelines to place emerging findings into context and provide clear recommendations for clinical practice
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Getting on track to end AIDS as a public health threat by 2030. This new Road Map charts a way forward for country-level actions to achieve an ambitious set of HIV prevention targets by 2025. Those targets emerged from the 2021 Political Declaration on HIV and AIDS, which the United Nations General ...Assembly adopted in June 2021 and they are underpinned by the Global AIDS Strategy (2021–2026). The Strategy sets out the principles, approaches, priority action area and programmatic targets for the global HIV response
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About one fourth of the world’s population is estimated to have been infected with the tuberculosis (TB) bacilli, and about 5–10% of those infected develop TB disease in their lifetime. The risk for TB disease after infection depends on several factors, the most important being the person’s im...munological status. TB preventive treatment (TPT) given to people at highest risk of progressing from TB infection to disease remains a critical element to achieve the global targets of the End TB Strategy, as reiterated by the second UN High Level Meeting on TB in 2023. Delivering TPT effectively and safely necessitates a programmatic approach to implement a comprehensive package of interventions along a cascade of care: identifying individuals at highest risk, screening for TB and ruling out TB disease, testing for TB infection, and choosing the preventive treatment option that is best suited to an individual, managing adverse events, supporting medication adherence and monitoring programmatic performance
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Q6: What is the added advantage of doing neuroimaging in people with convulsive epilepsy in non-specialist settings in low and middle income countries?
Following a radiation incident such as an improvised nuclear device (IND) detonation, state and local response authorities will need to establish one or more population monitoring and decontamination facilities to assess
people for radioactive exposure, contamination, and the need for
decontamin...ation or other medical follow-up. These facilities are known as community reception centers (CRCs). The basic services offered at a CRC include the following: screening people for radioactive contamination, assisting people with washing or decontamination, registering people for subsequent follow-up, and prioritizing people for further care. This guide
describes the function of each station of a CRC and provides a question bank and other information to guide data collection at each station. A question bank format was chosen to provide the user the ability to tai
lor the data collection tool to fit a particular incident and/or locality.
The CRC data collection tool is designed for CRC staff to fill out the information collected from the individual being assessed.
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Every country has been affected by COVID-19, with nearly a quarter
of a billion cases and almost 5 million deaths reported globally as of
end of September 2021. Despite the stunning speed with which highly
effective and safe vaccines have been developed, new waves of disease
are still pushin...g health systems to the breaking point, increasingly
transmissible variants are emerging, some survivors are suffering
serious long-term sequelae, and the International Monetary Fund
estimates that global economic losses could exceed US$5.3 trillion
by 2026, if COVID-19 becomes endemic.
Although over 6 billion doses of COVID-19 vaccine have already been
administered, and global production is now reaching 1.5 billion doses
per month, the world is not positioned to end the pandemic. In areas of
high vaccine coverage, there have been massive reductions in serious
disease, hospitalization and death but, globally, vaccine access is highly
inequitable with coverage ranging from 1% to over 70%, depending
largely on a country’s wealth. Consequently, SARS CoV-2 variants
continue to emerge, causing surges of disease and slowing or even
reversing the reopening of societies and economies.
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Three classess of tests are now recommended in the latest consolidated guideles on tests for tuberculosis infection. It includes for the first-time a new class of Mycobacterium tuberculosis antigen-based skin tests (TBSTs), and the two existing classes of tests: the tuberculin skin test (TST) and t...he interferon-gamma release assays (IGRAs).
IGRAs and TBSTs use Mycobacterium tuberculosis complex specific antigens and represent a significant advancement to TST which has been used for over half a century.
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Working document from an informal consultation of experts. A Protocol for risk assessment at the field level. The purpose of document is to provide guidance on the methodology to be used for assessing, at field level, the yellow fever virus circulation in areas at risk, and is primarily intended fo...r public health specialists
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Application of a One Health approach .
The present guidance was developed with the support of the WHO Advisory Group on Integrated Surveillance of Antimicrobial Resistance (AGISAR) to assist countries and other stakeholders in the establishment and development of programmes of integrated surveillan...ce of antimicrobial resistance in the foodborne bacteria (i.e., bacteria commonly transmitted by food) by taking a One Health approach.
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The handbook on supply chain management for HIV/AIDS commodities was written to assist program managers to plan and implement day–to-day management of all drugs and medical supplies for an HIV/AIDS program. Many of the suggested techniques described in this handbook are helpfu...l to program managers starting to plan or scale-up provision of drugs and supplies for a HIV/AIDS program. Additionally, some of the information may be helpful to readers who are implementing a new program and may not have robust logistics systems in place. For other readers, this handbook may serve as a checklist of systems and procedures that need to be in place in order to manage the many of the health commodities required for the HIV/AIDS program.
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Many critical questions remain about the effectiveness of COVID-19 vaccines in real-world settings. These questions can only be answered in post-introduction vaccine effectiveness studies.This guidance document outlines an approach to leverage existing surveillance systems for Severe Acute Respirato...ry Infection (SARI) to estimate COVID-19 vaccine effectiveness (VE) in preventing SARI associated with laboratory-confirmed SARS-CoV-2 using existing SARI surveillance systems. The approach uses the test-negative design to evaluate VE; cases are SARI patients who tested positive for SARS-CoV-2, and controls are SARI patients who tested negative for SARS-CoV-2.
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This research report provides results from the study on living conditions
among people with disabilities in Malawi. Comparisons are made between
individuals with and without disabilities and also between households with and without a disabled family member. Results obtained in Malawi are also comp...ared those obtained in earlier studies carried out in Namibia and Zimbabwe. The Malawian study was undertaken in 2003.
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The purpose of the PAS III is to guide Pakistan’s overall national response for HIV and AIDS through 2020, through focused interventions with set targets, costs, roles and responsibilities. The successful implementation of PAS III involves multiple stakeholders to achieve priority outcomes outline...d in the Strategy. The Strategy focuses on allocating limited resources to scale up high-impact, high-value interventions such as HTC and treatment to reduce AIDS related deaths and new HIV infections. Priorities in the PAS III have been identified to ensure maximum impact in reducing new infections, especially among key populations, improving treatment uptake and retention, and improving the quality of life of people living with HIV and AIDS in the context of limited financial and human resources.
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