HIV testing programmes need to ensure that all clients who test for HIV are provided with correct diagnoses. The accuracy of HIV testing is critical to prevent misdiagnosis, as the consequences of giving an incorrect test result can be serious for clients, HIV testing services, HIV programmes and pu...blic health.
With the evolution of global HIV epidemiology, HIV testing approaches must also evolve to maintain accuracy and efficiency in population-level diagnosis. Reports suggest that misdiagnosis of HIV status may occur when suboptimal testing algorithms and out-of-date testing strategies are used. As a result of changing epidemiology and declining HIV positivity in testing, WHO recommends all countries use a standard three-test strategy to ensure a PPV of at least 99%, minimizing false-positive misdiagnosis. The WHO-recommended HIV testing strategy, along with quality assurance measures such as retesting to verify a positive diagnosis prior to initiation of HIV treatment, is cost-effective as it prevents misdiagnosis and unnecessary initiation of costly lifelong treatment.
This implementation guide provides practical advice on switching to a three-test strategy and instituting other measures that can help national HIV programmes deliver high-quality, accurate HIV testing services and ensure that misdiagnosis is minimized.
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The third edition, released in 2018, has grown to include a total of 18 chapters, contributed by 20 experts and authors from many countries. The goal remains the same: to educate primary care providers on the best practices in TB diagnosis, treatment and follow-up. All articles are richly illustrate...d, and most include quizzes and CME questions for self learning. The 3rd edition includes new chapters on MDR-TB, adverse effects of TB drugs, adherence monitoring strategies, and nutritional support. There is also content on how to manage children with TB, care for patients co-infected with TB and HIV, how to read and interpret chest x-rays, and how to avoid common pitfalls in TB management.
To download book chapters or the whole book go to the website: http://www.letstalktb.org/download/
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Systematic screening for TB disease is the systematic identification of people at risk for TB disease, in a predetermined target group, by assessing symptoms and using tests, examinations or other procedures that can be applied rapidly.
Systematic screening can benefit people who are at risk of get...ting TB, as early detection and start of treatment can improve their outcomes and reduce their costs. It can also benefit entire communities at higher risk for TB, by reducing the prevalence of TB disease and preventing future cases.
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“Continuum of HIV services refers to a comprehensive package of HIV prevention, diagnostic, treatment, care and support services provided for people at risk of HIV infection or living with HIV and their families”
August, 2018
Rabies has an enormous impact on both agriculture and conservation biology, but its greatest burden is undeniably on public health. As such, routine methods for rapid risk assessment after human exposures to rabies as well as applications for laboratory-based surveillance, production of biologicals ...and management of this infectious disease are critical. Given its mandate to improve human health and control disease among its Member States, WHO has led the production of this fifth edition of Laboratory techniques in rabies.
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Mpox is an emerging zoonotic disease caused by the mpox virus, a member of the Orthopoxvirus genus closely related to the variola virus that causes smallpox. Mpox was first discovered in 1958 when outbreaks of a pox-like disease occurred in monkeys kept for research. The first human case was recorde...d in 1970 in the Democratic Republic of the Congo (DRC) during a period of intensified effort to eliminate smallpox and since then the infection has been reported in a number of African countries. Mpox can spread in humans through close contact, usually skin-to-skin contact, including sexual contact, with an infected person or animal, as well as with materials contaminated with the virus such as clothing, beddings and towels, and respiratory droplets in prolonged face to face contact. People remain infectious from the onset of symptoms until all the lesions have scabbed and healed. The virus may spread from infected animals through handling infected meat or through bites or scratches. Diagnosis is confirmed by polymerase chain reaction (PCR) testing of material from a lesion for the virus’s DNA. Two separate clades of the mpox virus are currently circulating in Africa: Clade I, which includes subclades Ia and Ib, and Clade II, comprising subclades IIa and IIb. Clade Ia and Clade Ib have been associated with ongoing human-to-human transmission and are presently responsible for outbreaks in the Democratic Republic of the Congo (DRC), while Clade Ib is also contributing to outbreaks in Burundi and other countries.
In 2022‒2023 mpox caused a global outbreak in over 110 countries, most of which had no previous history of the disease, primarily driven by human-to-human transmission of clade II through sexual contact. In just over a year, over 90,000 cases and 150 deaths were reported to the WHO. For the second time since 2022, mpox has been declared a global health emergency as the virus spreads rapidly across the African continent. On 13 Aug 2024, Africa CDC declared the ongoing mpox outbreak a Public Health Emergency of Continental Security (PHECS), marking the first such declaration by the agency since its inception in 2017.7 This declaration empowered the Africa CDC to lead and coordinate responses to the mpox outbreak across affected African countries. On August 14, 2024, the WHO declared the resurgence of mpox a Public Health Emergency of International Concern (PHEIC) emphasizing the need for coordinated international response.
As of August 2024, Mpox has expanded beyond its traditional endemic regions, with new cases reported in countries including Sweden, Thailand, the Philippines, and Pakistan. Sweden has confirmed its first case of Clade 1 variant, which has been rapidly spreading in Africa, particularly in DRC. The emergence of this new variant raises concerns about its potential for higher lethality and transmission rates outside Africa.
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2nd edition. WHO's recommendation has not changed: the standard WHO susceptibility tests should remain a primary method by which resistance is detected. However, it was considered necessary to update the existing resistance-monitoring procedures to also highlight the need for operationally meaningfu...l data.
Two new assays were included in this expanded version: an intensity assay and a synergist assay.
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This clinical job aid addresses the importance of maternal health and antiretroviral therapy adherence, as well as care and testing for the HIV-exposed infant until the infant’s final HIV diagnosis after the end of breastfeeding.
This guide includes information relevant for tuberculosis (TB) program and laboratory managers, as well as Ministry of Health officials across disease programs interested in establishing integrated solutions for specimen referral. Though TB-focused in name, it offers integration-oriented assessment,... design, and monitoring guidance related to improving coordination and efficiency, and is relevant for other programs as well. Country case studies include viral load and early infant diagnosis (EID) in Uganda and EID in Ethiopia.
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Journal of the International AIDS Society, Volume 20, Issue 1 (2017)21796
Qualitative research on HIV self testing among men who have sex with men and transgender women in Yangon, Mynamar.
Global effort to increase early diagnosis and engagement in HIV care emphasize the importance ...of developing novel approaches to reaching those missed by traditional methods. Such needs are particularly great for men who have sex with men (MSM), transgender women (TW), and other populations who face stigma. Myanmar's HIV epidemic is concentrated among key populations and the revised National Strategy aims to reduce late diagnosis and barriers to care to curb HIV incidence among these groups. HIV self‐testing (HIVST) may be one method to improve testing and diagnosis among key populations, by placing HIV testing and disclosure within the individual's control.
https://doi.org/10.7448/IAS.20.01.21796
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TB heroes
Hello, my name is Nurse X
My job is to promote integrated HIV and TB prevention, care, treatment and support. This ensures that we, and my team of health care service providers treat everyone who is living with HIV and TB to have all the antiretroviral therapy (ART) and HIV care services... are provided with TB diagnosis and treatment at one facility. Services that we provide include * Infection control education * TB screening and diagnosis * HIV testing * Treatment for those who require it * Adherence support
Accessed November 2017
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Six months after its launch on 24 April, the Access to COVID-19 Tools (ACT) Accelerator has already delivered concrete results in speeding up the development of new therapeutics, diagnostics, and vaccines. Now mid-way through the scale-up phase, the tools we need to fundamentally change the course o...f this pandemic are within reach. But to deliver the full impact of the ACT-Accelerator – and ultimately an exit to this global crisis – these tools need to be available everywhere. On behalf of the ACT-Accelerator Pillar lead agencies – CEPI, Gavi, the Global Fund, FIND, Unitaid, Wellcome Trust, the World Bank, and the World Health Organization, as well as the Bill & Melinda Gates Foundation – I am pleased to share this document setting out the near-term priorities, deliverables and financing requirements of the ACT-Accelerator Pillars and Health Systems Connector. Urgent action to address these financing requirements will boost the impact of the ACTAccelerator achievements to date, fast-track the development and deployment of additional game-changing tools, and mitigate the risk of a widening gap in access to COVID-19 tools between low- and high-income countries. Delivering on this promise requires strong political leadership, financial investment, and incountry capacity building. COVID-19 cannot be beaten by any one country acting alone. We must ACT now, and ACT together to end the COVID-19 crisis.
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Histoplasmosis is a disease caused by the fungus Histoplasma capsulatum. This disease is highly endemic in some regions of North America, Central America, and South America and is also reported in certain countries of Asia and Africa. It often affects people with impaired immunity, including people ...living with HIV, among whom the most frequent clinical presentation is disseminated histoplasmosis. The symptoms of disseminated histoplasmosis are non-specific and may be indistinguishable from those of other infectious diseases, especially disseminated tuberculosis (TB), thus complicating diagnosis and treatment. Histoplasmosis is one of the most frequent opportunistic infections caused by fungal pathogens among people living with HIV in the Americas and may be responsible for 5–15% of AIDS-related deaths every year in this Region. These guidelines aim to provide recommendations for the diagnosis, treatment, and management of disseminated histoplasmosis in persons living with HIV
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The two-year impact report for the Access to COVID-19 Tools (ACT) Accelerator details impact, case studies and timelines of key milestones for the Diagnostics, Therapeutics and Vaccines pillars, as well as the Health Systems and Response Connector.
The Committee discussed the implications for preparedness for smallpox-like events reflected by the ongoing COVID-19 pandemic. The Committee noted how quickly diagnostics and vaccines could be developed and deployed when resources and political will were abundant. This rapidity was also due to the f...act that the genetic sequence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) had been shared worldwide. It was noted that in one country SARS-CoV-2 had been reconstructed in a laboratory from the viral genome sequence before the first case of COVID-19 had been reported, highlighting the benefits of synthetic biology technologies for accelerated development of diagnostics as well as the oft-described potential risks. Lessons learned about clinical care during the COVID-19 pandemic were also discussed.
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The Updated guidelines on Management of tuberculosis in children and adolescents include new recommendations that cover diagnostic approaches for TB, shorter treatment for children with non-severe drug-susceptible TB, a new option for the treatment of TB meningitis, the use of bedaquiline and delama...nid in young children with multidrug- and rifampicin-resistant TB and decentralized and family-centred, integrated models of care for TB case detection and prevention in children and adolescents.
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Meeting Report 27-29 October 2020
The overall goal of the meeting was to discuss recent changes in treatment regimens and diagnostics for drug-resistant TB and to determine how these impact on the definition of XDR-TB, with a view to revising this definition. The pre-existing definition of XDR-TB w...as formulated in 2006 at a meeting of the Global Taskforce on XDR-TB, convened by WHO, and has been in use for clinical and surveillance purposes, since this time.
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Malaria is a prevalent cause of febrile illnesses in areas with high transmission, and its clinical presentation overlaps with initial signs of Ebola disease. For this reason, the effectiveness of the Ebola response in Guinea, Liberia and Sierra Leone can be optimized through the deployment of targe...ted measures to reduce the number of fever cases due to malaria
WHO recommends specific adaptations in the diagnosis of malaria and in LLIN distribution in countries heavily affected by the Ebola outbreak and mass drug administration using artemisinin-based combination therapies (ACTs) in areas where transmission of both Ebola and malaria is high and access to malaria treatment is very low.
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The document provides a comprehensive overview of malaria, covering its global impact, transmission, symptoms, diagnosis, treatment, prevention strategies, and the role of public health interventions—especially in high-risk regions like sub-Saharan Africa—to reduce its incidence and mortality.