Zika and dengue viruses remain significant public health threats. These viruses share the same Aedes (Stegomyia) mosquito vectors and geographic distributions but infections cannot be readily distinguished clinically and need to be differentiated from each other, and from other circulating arboviral... and non-arboviral pathogens, using laboratory tests. This document provides guidance on current testing strategies for Zika and dengue virus infections with updates to the previous interim guidance for laboratory testing for ZIKV, addressing pregnant and non-pregnant patients respectively, and incorporates current guidance for dengue virus diagnostic testing. The choice of laboratory assays and interpretation of test results require careful consideration of epidemiology, patient history, and limitations of existing diagnostic tests.
This interim guidance is for use by staff of laboratories testing for Zika and dengue virus infections and for clinical practitioners and public health professionals providing clinical management or surveillance.
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La fourniture de sang et de produits sanguins sûrs et efficaces pour la transfusion ou la fabrication d’autres produits sanguins fait intervenir un certain nombre de processus, allant de la sélection des donneurs de sang et de la collecte, au traitement et au dépistage des dons de sang ainsi qu...’à l’analyse des échantillons des malades, à la délivrance de sang compatible et à son administration au patient. Il existe un risque d’erreur à chaque étape de la « chaîne de transfusion », et une défaillance à une quelconque de ces étapes peut avoir des conséquences graves pour les receveurs du sang ou des produits sanguins. Si la transfusion sanguine peut sauver des vies, elle comporte aussi des risques, en particulier la transmission des infections par le sang.
Le dépistage des infections transmissibles par transfusion (ITT) en vue d’exclure les dons de sang présentant un risque de transmettre une infection du donneur aux receveurs est une étape critique du processus visant à garantir au mieux la sécurité des transfusions. Un dépistage efficace des agents transmissibles par le sang les plus courants et les plus dangereux peut réduire le risque de transmission à des niveaux très faibles.
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External quality assessment (EQA) is an important component of quality systems for blood transfusion services. Establishing external quality assessment programmes for screening of donated blood for transfusion-transmissible infections (TTI): implementation guide aims to support WHO member States in ...establishing and operating EQA programmes for screening donated blood for TTI. The guides has been designed for use by national health authorities and EQA organizing institutions in the development of EQA programme. It will also give participating laboratories an insight into the organization of EQA programmes for TTI screening and an understanding of the benefits of participation.
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The provision of safe and efficacious blood and blood components for transfusion or manufacturing use involves a number of processes, from the selection of blood donors and the collection, processing and testing of blood donations to the testing of patient samples, the issue of compatible blood and ...its administration to the patient. There is a risk of error in each process in this “transfusion chain” and a failure at any of these stages can have serious implications for the recipients of blood and blood products. Thus, while blood transfusion can be life-saving, there are associated risks, particularly the transmission of bloodborne infections.
Screening for transfusion-transmissible infections (TTIs) to exclude blood donations at risk of transmitting infection from donors to recipients is a critical part of the process of ensuring that transfusion is as safe as possible. Effective screening for evidence of the presence of the most common and dangerous TTIs can reduce the risk of transmission to very low levels.
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L’évaluation externe de la qualité (EEQ) est une composante importante des systèmes qualité des services de transfusion sanguine. L’EEQ est l’évaluation externe de la qualité générale des résultats obtenus par un laboratoire dans l’analyse d’échantillons de contrôle dont le cont...enu est connu, mais n’a pas été dévoilé, et la comparaison de ces résultats avec ceux qu’ont obtenus d’autres laboratoires qui ont analysé les mêmes échantillons. Dans les laboratoires qui pratiquent le dépistage des infections transmissibles par transfusion (ITT) dans les dons de sang, la participation à l’EEQ aide à surveiller et améliorer la qualité des résultats. Les informations issues de l’EEQ permettent d’améliorer continuellement la qualité en mettant en évidence les erreurs d’un laboratoire et d’appliquer des mesures pour éviter qu’elles se reproduisent. L’EEQ joue ainsi un rôle essentiel dans l’amélioration de la sécurité transfusionnelle.
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This clinical job aid provides health care workers with information on how to collect specimens for early infant diagnosis on dried blood spots, as well as drying and packaging for transport.
This job aid provides information for laboratorians about how to receive, process, and store dried blood spot specimens collected for early infant diagnosis, viral load, or drug resistance testing.
HIV-1 drug resistance (HIVDR) genotyping is an essential component of the WHO global HIVDR surveillance strategy. Plasma “gold standard” specimen type for HIVDR genotyping, but its use may not be feasible in rural, remote areas in low- and middle-income countries, since preparing and storing it ...require personnel and laboratory infrastructure that are often lacking. An alternative specimen type is dried blood spots (DBS), which can be made without special laboratory processing. DBS are more easily transported than plasma because they can be shipped at ambient temperature as non-hazardous materials using regular mail or courier services.
3rd edition
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High salt consumption is an important determinant of high blood pressure and reducing it would improve health outcomes by lowering cardiovascular disease and therefore death rates. Reducing salt intake has been identified as one of the most effective public health measures and is one of the leading ...targets at global, regional and national levels to reduce the burden of noncommunicable diseases. The purpose of the Dietary Salt Intake Survey in the Republic of Moldova was to establish current baseline average consumption of salt (sodium), potassium and iodine through 24-hour urinary excretion testing among a random sample of the adult population (aged 18–69 years), and to assess the knowledge, attitudes, practices and behaviour around dietary salt in order to enable more efficient planning and the implementation of an effective salt-reduction strategy in the Republic of Moldova.
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second edition
Included more self-measured blood pressure (SMBP)-focused content with tools and resources.
Showcased more tools to find patients with potentially undiagnosed HTN.
Added new strategies that focus on chronic kidney disease testing and identification.
To provide supply & equipment to collect, test and transfuse 50 blood bags.
The new Collection testing and transfusion kit 2021 is specially designed for emergency settings where blood transfusion is crucial. It contains all the necessary supply & equipment needed to collect blood, test it agains...t HIV, Malaria, Hep B and C, and syphilis, make sure of the blood grouping, and ensure transfusion.
The equipment such as blood bags, IV transfusion set and vacutainer blood collection tubes are from BD or Fresenius Kabi, also available as single item in the WHO catalogue.
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These guidelines provide updated evidence-based recommendations on the priority HCV-related topics from the 2018 WHO Guidelines for the care and treatment of persons diagnosed with chronic hepatitis C infection and the 2017 WHO Guidelines on hepatitis B and C testing. These priority areas are:
... direct-acting antiviral (DAA) treatment of adolescents and children ages ≥3 years of age
simplified HCV service delivery (decentralization, integration and task sharing)
HCV diagnostics – use of point-of-care (POC) HCV ribonucleic acid (RNA) assays and reflex HCV RNA testing.
These guidelines also update existing chapters without new recommendations, such as the inclusion of new manufacturers’ protocols on the use of dried blood spot (DBS) for HCV RNA testing and new data to inform the limit of detection for HCV RNA assays as a test of cure, in addition to their use for diagnosis.
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To conduct a study in a small rural hospital located in the state of Chiapas, Mexico, to: examine the prevalence of chagasic cardiomyopathy among patients with the diagnosis of congestive heart failure and assess the prevalence of positive serologic results in blood donors in the hospital, in an att...empt to ascertain whether Chagas’ disease remains an important cause of heart failure at least in some areas of Mexico. Methods. The study of patients with cardiomyopathy was conducted.
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FIND and Standard Diagnostics (SD) have developed a lateral flow rapid diagnostic test (RDT) to screen for
T.b. gambiense HAT that is cheap and easy to use. The tests are packed individually and are stable at 40°C for
up to 25 months; they are performed on fresh blood obtained from a finger prick..., and no instrument or electricity is required. The RDT detects host antibodies to infection in populations that are at risk, or in suspect individuals. Positive cases are subjected to further confirmatory methods to identify HAT patients.
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Access to safe blood and blood products is recognized as one of the key requirements for delivery of modern health care in the journey towards health for all. The foundation of safe and sustainable blood supplies depends on the collection of blood from voluntary non-remunerated and low-risk donors. ...Data from the WHO Global Database for Blood Safety (GDBS) brings out several inadequacies related to the supply and safety of blood and blood products. These inadequacies include a number of variations in safe blood practices across the world, including the quantity of blood donated (voluntary and replacement types), quality and adequate testing of the donated blood (immunohaematology [IH] and transfusion-transmitted infections [TTIs]), rational use of blood and blood components such as appropriate patient blood management protocols. These variations are very high in countries of the South-East Asian Region and most of them are either low- or middle-income countries (LMICs).
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