WHO recommends standards for malaria surveillance to enable countries to effectively control and eliminate the disease. These standards include prompt malaria diagnosis, case management, active case detection, and surveillance of insecticide and drug resistance. Key elements include standardized def...initions for cases, indicators, and procedures for data collection, analysis, and interpretation
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Au cours de la dernière décennie, les données de séquençage génétique des agents pathogènes ont gagné en importance et contribuent désormais de façon déterminante à la détection et à la maîtrise des flambées de maladies infectieuses, en facilitant la mise au point de ...produits de diagnostic, de médicaments et de vaccins et en guidant lesactivités de riposte aux flambées(1-11). L’émergence du nouveau coronavirus, par la suite désigné « coronavirus 2 du syndrome respiratoire aigu sévère » (SARS-CoV-2), a encore accentué l’importance des données de séquençage génétique.
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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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12 countries have a high TB estimated burden with an incidence rate more than 45 per 100 000 population They represent 88 of the cases in the Region
In 2019 the TB case detection gap in the Region was 52 500 cases
This document summarizes current WHO guidance for public health surveillance of coronavirus disease 2019 (COVID-19) in humans caused by infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
New elements include:
update of contact definitions, in line with latest cont...act tracing guidance
update of detection strategies in line with updated version of WHO SARS-CoV-2 testing guidance
reinfection evidence standardization and surveillance: molecular, genomic and immunological evidence of reinfection
inclusion of clinical case definition of Post COVID-19 condition as defined by WHO
definition of breakthrough infection
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Representative, quality, timely and continuous genetic surveillance of SARS-CoV-2 is critical to the COVID-19 outbreak response. This document provides practical guidance to Global Influenza Surveillance and Response System (GISRS) laboratories and other relevant national laboratories to move beyond... virus detection to genomic sequencing of SARS-CoV-2 PCR positive materials obtained from sentinel surveillance of influenza-like illness (ILI), acute respiratory infection (ARI) and severe acute respiratory infection (SARI). It contains considerations on sample selection for sequencing, numbers of viruses to be sequenced, metadata and timeliness for sharing genetic sequence data (GSD) and opportunities for technical support.
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For the molecular diagnosis of Chagas disease by real-time PCR (polymerase chain reaction), optimization of diagnostic accuracy is desirable. The detection limit of real-time PCR assays for the diagnosis of Trypanosoma cruzi in human serum is affected by various influences including the choice of th...e nucleic acid extraction assay. In this study, three nucleic acid extraction assays were compared regarding their influence on the sensitivity of a T. cruzi-specific real-time PCR with 62 reference sera containing T. cruzi target DNA (deoxyribonucleotide acid). More than 95% of the positive sera were correctly identified after all three nucleic acid extraction strategies with a detection rate ranging from 96.8% (60/62) for the worst assay to 100% (62/62) for the best one. A matched pairs analysis for the comparison of the cycle threshold (Ct) values obtained with the 59 reference samples with positive real-time PCR results after all three nucleic acid extraction schemes indicated differences in a range of about 3 Ct steps. Summarized, all three compared nucleic acid extraction schemes were basically suitable for T. cruzi-specific PCR from serum with some minor differences. However, in the case of low quantities of circulating parasite DNA in the serum of a patient with Chagas disease, even minor effects can make a difference in the individual diagnosis.
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Guidance for COVID-19 Prevention and Control in Schools. Arabic Version
The purpose of this document is to provide clear and actionable guidance for safe operations through the prevention, early detection and control of COVID-19 in schools and other educational facilities. The guidance, while speci...fic to countries that have already confirmed the transmission of COVID-19, is relevant in all other contexts. Education can encourage students to become advocates for disease prevention and control at home, in school and in their community by talking to others about how to prevent the spread of viruses. Maintaining safe school operations or reopening schools after a closure requires many considerations but, if done well, can promote public health
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This project aims to support host nations in delivering a safe and successful event, as part of WHO’s ongoing support to countries in strengthening the International Health Regulations capacities for prevention, detection and response to the public health events in the context of hosting Mass Gath...ering (MG) events, in collaboration with the WHO collaborating centres.
The online course will provide an overview of the key steps and considerations that a host country will need to take when planning to host a MG. It consists of one introduction and eight independent technical modules
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12 countries have a high TB estimated burden with an incidence rate more than 45 per 100 000 population They represent 88 of the cases in the Region
In 2019 the TB case detection gap in the Region was 52 500 cases
In 2014, the World Heart Federation (WHF) launched
an initiative to develop a series of Roadmaps [1e6]. Their
aim is to identify potential roadblocks on the pathway to
effective prevention, detection, and management of cardiovascular disease (CVD), along with evidence-based
solutions to overcome... them. The resulting documents
provide a framework to translate strategic intent into action
on integrating epidemiology, population, and cardiovascular outcome trial data into national plans for optimal
CVD management.
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Introducing the cholera user-friendly app. As part of the effective implementation of the Ending Cholera: A Global Roadmap to 2030, the GTFCC developed a phone-based application containing technical information and practical documents to provide clear guidance and up to date information for early de...tection, monitoring and efficient response to cholera outbreaks. The application is designed for public health professionals from all sectors working in cholera control. The app is designed to be used offline to accommodate those working in the most remote areas.
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The Interim Guidance on Cholera Rapid Diagnostic Tests (RDTs) by the Global Task Force on Cholera Control (GTFCC) provides recommendations for using RDTs to detect cholera in areas with limited laboratory capacity. It highlights the advantages of RDTs, such as rapid detection (within 30 minutes), ea...se of use by non-laboratory personnel, and their role in early outbreak identification and surveillance. However, it emphasizes that RDTs should not replace culture or PCR testing, as they vary in sensitivity (58-100%) and specificity (60-100%). The document advises on proper test selection, storage, training, and integration into national surveillance systems to enhance cholera response efforts.
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Planning for public health emergencies should ensure that capabilities developed during previous emergencies are maintained, incorporated, and put into practice when a new event of public health concern arises. Investments in pandemic preparedness lead to more rapid detection and a stronger response... to public health threats, thereby shielding communities from the debilitating social and economic effects of epidemics and pandemics. The Pan American Health Organization (PAHO) recognizes the efforts of countries in the Region of the Americas to develop and/or strengthen their respiratory pathogen pandemic plans. PAHO supports planning activities with tools and expertise, aligning these efforts with the Preparedness and Resilience for Emerging Threats (PRET) initiative. The PRET initiative is an innovative approach to improving disease pandemic preparedness. It recognizes that the same systems, capacities, knowledge, and tools can be leveraged and applied for groups of pathogens based on their mode of transmission (respiratory, vector-borne, foodborne etc.). The PRET initiative incorporates the latest tools and approaches for shared learning and collective action established during the COVID-19 pandemic and other recent public health emergencies.
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The WHO Cholera Rapid Diagnostic Test (RDT) Target Product Profile outlines the key requirements for developing improved cholera RDTs. It highlights the need for fast, accurate, and easy-to-use tests for early outbreak detection in resource-limited settings. The document sets desired and acceptable ...performance criteria, including high sensitivity and specificity, rapid results (under 15 minutes), and usability by non-laboratory personnel. The tests should be affordable, stable in extreme conditions, and require minimal training. The goal is to enhance cholera surveillance and outbreak response, ensuring quick containment and improved public health outcomes.
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HAT diagnosis relies on laboratory techniques because clinical signs and symptoms are unspecific. Serodiagnostic tests exist only for Tbg and are based on the detection of specific antibodies, thus they are not confirmatory of infection. With the current low disease prevalence, the positive predicti...ve value of serological tests is particularly low. Field-applicable tools include the card agglutination test for trypanosomiasis (CATT) used mainly in active screening by specialized mobile teams, and the rapid diagnostic tests that are more suitable for individual testing at point-of-care. Confirmation of Tbg infection requires microscopic examination of body fluids necessitating specific training. The best performing methods are laborious and reach 85–95% diagnostic sensitivity when performed by skilled personnel.
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HAT diagnosis relies on laboratory techniques because clinical signs and symptoms are unspecific. Serodiagnostic tests exist only for Tbg and are based on the detection of specific antibodies, thus they are not confirmatory of infection. With the current low disease prevalence, the positive predicti...ve value of serological tests is particularly low. Field-applicable tools include the card agglutination test for trypanosomiasis (CATT) used mainly in active screening by specialized mobile teams, and the rapid diagnostic tests that are more suitable for individual testing at point-of-care.
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PLoS Negl Trop Dis 16(11): e0010885. https://doi.org/10.1371/journal.pntd.0010885
HAT diagnosis in non-endemic countries is rare and can be challenging, but alertness and
surveillance must be maintained to contribute to WHO’s elimination goals. Early detection is
particularly important as it co...nsiderably improves the prognosis.
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In 2007, the Sixtieth World Health Assembly adopted resolution WHA60.13 on control of leishmaniasis, urging Member States, among other actions: to strengthen prevention, active detection and treatment of cases of both cutaneous and visceral leishmaniasis in order to decrease the disease burden; and ...to strengthen the capacity of peripheral health centres to deliver primary and secondary care, so that they provide appropriate affordable diagnosis and treatment and act as sentinel surveillance sites.
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Efficacious antimalarial medicines are critical to malaria control and elimination. Continuous monitoring of their efficacy is needed to inform treatment policies in malaria-endemic countries, and to ensure early detection of, and response to, drug resistance.