Epidemiology
Chagas disease (American trypanosomiasis) is caused by the protozoan parasite Trypanosoma cruzi, and transmitted to humans by infected triatomine bugs, and less commonly by transfusion, organ transplant, from mother to infant, and in rare instances, by ingestion of contaminated food or
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drink.1-4 The hematophagous triatomine vectors defecate during or immediately after feeding on a person. The parasite is present in large numbers in the feces of infected bugs, and enters the human body through the bite wound, or through the intact conjunctiva or other mucous membrane.
Vector-borne transmission occurs only in the Americas, where an estimated 8 to 10 million people have Chagas disease.5 Historically, transmission occurred largely in rural areas in Latin America, where houses built of mud brick are vulnerable to colonization by the triatomine vectors.4 In such areas, Chagas disease usually is acquired in childhood. In the last several decades, successful vector control programs have substantially decreased transmission rates in much of Latin America, and large-scale migration has brought infected individuals to cities both within and outside of Latin America.
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Chagas disease (CD) is endemic in the Americas, being present in 21 countries, where it affects about 6 million
people.(1) With such relevant numbers of people affected and disability adjusted life years lost, CD is a poverty-related
and poverty-promoting disease.
Although data describe a relevan
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t ongoing public health problem for the American continent, significant results
in the interruption of transmission has been achieved by coordinated multi-country programs. In particular, the
Southern Cone Initiative (SCI), officially formalised in November 1991 by the Ministers of Health of Argentina, Brazil, Bolivia, Chile, Paraguay and Uruguay, has shown how a well-designed control program can significantly reduce
CD transmission.(2) Before this initiative, in these countries, there were 11 million infected persons and 50 million at
risk, 62% of the infected individuals of the whole continent.
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The goals of Ebola virus disease (EVD) surveillance during Phase 3 of the Ebola response are to promptly detect new, suspected EVD cases and deaths so as to trigger appropriate response, including rapid diagnosis, case isolation and management, contact tracing, safe burials, and the identification o
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f transmission chains
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Interim Guidance.
A number of medical problems have been reported in survivors, including mental health issues. Ebola virus may persist in some body fluids, including semen. Ebola survivors need comprehensive support for the medical and psychosocial challenges they face and also to minimize the
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risk of continued Ebola virus transmission. WHO has developed this document to guide health services on how to provide quality care to survivors of Ebola virus disease
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Testing and diagnosis of hepatitis B (HBV) and C (HCV) infection is the gateway for access to both prevention and treatment services, and is a crucial component of an effective response to the hepatitis epidemic. Early identification of persons with chronic HBV or HCV infection enables them to recei
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ve the necessary care and treatment to prevent or delay progression of liver disease. Testing also provides an opportunity to link people to interventions to reduce transmission, through counselling on risk behaviours and provision of prevention commodities (such as sterile needles and syringes) and hepatitis B vaccination.
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Recent systematic reviews and meta-analysis of the impact of chemical-based mollusciciding (King et al., 2015, Sokolow et al., 2016) have concluded that regular mollusciciding is likely to contribute significantly towards elimination of schistosomiasis in high-risk areas. The WHO roadmap’s new foc
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us on “transmission control, wherever possible” (WHO, 2012a) reinforces the need to promote intermediate-host snail control to prevent schistosomiasis transmission.
This operational manual is intended to facilitate the reintroduction of practices and protocols for use of molluscicides in the field in schistosomiasis control programmes. It is complemented by guidelines on the laboratory and field testing of the efficacy of molluscicides for schistosomiasis control (WHO, 2017 [in preparation]).
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Water, sanitation and hygiene (WASH) are critical in the prevention and care for all of the 17 neglected tropical diseases (NTDs) scheduled for intensified control or elimination by 2020.
Provision of safe water, sanitation and hygiene is one of the five key interventions within the global NTD
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roadmap. Yet to date, the WASH component of the strategy has received little attention and the potential to link efforts on WASH and NTDs has been largely untapped.
Focused efforts on WASH are urgently needed if the global NTD roadmap targets are to be met. This is especially needed for NTDs where transmission is most closely linked to poor WASH conditions such as soil-transmitted helminthiasis, schistosomiasis, trachoma and lymphatic filariasis.
This strategy aims to mobilise WASH and NTD actors to work together towards the roadmap targets.
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The major areas of focus for the plan will be:
- Social mobilization and community empowerment (health promotion & education for disease prevention);
- Promotion of access to safe water, good sanitation and hygiene;
- Surveillance and laboratory confirmation of outbreaks;
- Prom
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pt case management and infection control;
- Complementary use of oral cholera vaccine (OCV) for cholera endemic communities; and
- Coordination and stewardship between and for all actors.
- Monitoring, supervision, evaluation and operation research to ensure continued improvement in service delivery.
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This policy brief has been developed in response to the contemporary challenge of antibiotic resistance (ABR). ABR poses a formidable threat to global health and sustainable development. It is now increasingly recognized that the systematic neglect of cultural factors is one of the biggest obs
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tacles to achieving better health outcomes and better standards of living worldwide. Using a cultural contexts of health approach, the policy brief explores the centrality of culture to the challenge of ABR. The brief examines how the prescription and use of antibacterial medicines, the transmission of resistance, and the regulation and funding of research are influenced by cultural, social and commercial, as well as biological and technological factors. The brief moves beyond the ready equation of culture with individual behaviours and demonstrates how culture serve as an enabler of health and provide new possibilities for change.
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Accessed: 02.05.2020
These interim IPC recommendations for health settings have been developed through the contributions of many individuals and institutions, such as the Centers for Disease Control-Kenya; ITECH; US Agency for International Development (USAID) Medicines, Technologies, and Pharmaceu
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tical Services (MTaPS) Program; and WHO that are committed to ensuring that the transmission of COVID-19 to HCWs and the public within the health care setting is limited. The Ministry of Health (MOH) through the Directorate of Health Standards Quality Assurance and Regulations wishes to thank all the contributing authors led by the sub-committee on case management and IPC for the COVID-19 response for their expertise and time given to writing these guidelines.
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1 June 2020
Countries around the world are facing the challenge of increased demand for care of people with COVID-19, compounded by fear, misinformation and limitations on movement that disrupt the delivery of health care for all conditions. Maintaining essential health services: operational guidan
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ce for the COVID-19 context recommends practical actions that countries can take at national, subregional and local levels to reorganize and safely maintain access to high-quality, essential health services in the pandemic context. It also outlines sample indicators for monitoring essential health services, and describes considerations on when to stop and restart services as COVID-19 transmission recedes and surges. This document expands on the content of pillar 9 of the COVID-19 strategic preparedness and response plan, supersedes the earlier Operational guidance for maintaining essential health services during an outbreak, and complements the recently-released Community-based health care, including outreach and campaigns, in the context of the COVID-19 pandemic. It is intended for decision-makers and managers at the national and subnational levels.
This is an update to COVID-19: Operational guidance for maintaining essential health services during an outbreak: Interim guidance, 25 March 2020
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16 June 2020
PAHO’s Smart Hospitals Project started in 2009 and has been implemented across nine countries in the Caribbean Region. The onset of the COVID-19 pandemic has introduced new lessons to be incorporated as part of Smart Retrofits. This document is intended to describe simple natural and
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mechanical ventilation measures which can be implemented as an extension of the PAHO Smart Retrofits with the aim of reducing the risk of transmission of viruses like COVID-19.
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Practical considerations
It provides more detailed and practical guidance for continuing services for each life stage across the life-course continuum. As such, both documents should be read and used together. The countries in South-East Asia and the Pacific regions would like to adapt the guidance
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within the national and sub-national continuity plans, based on the local situation of COVID-19 transmission, containment response and health system capacity.
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Countries around the world are facing the challenge of increased demand for care of people with COVID-19, compounded by fear, misinformation and limitations on movement that disrupt the delivery of health care for all conditions. Maintaining essential health services: operational guidance for the CO
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VID-19 context recommends practical actions that countries can take at national, subregional and local levels to reorganize and safely maintain access to high-quality, essential health services in the pandemic context. It also outlines sample indicators for monitoring essential health services, and describes considerations on when to stop and restart services as COVID-19 transmission recedes and surges.
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Adolescent girls and young women (AGYW) remain disproportionately affected by HIV in Eastern and Southern Africa (ESA), with 26 per cent of new infections attributed to this population. AGYW face many personal, social and structural barriers to access, uptake and use of traditional HIV prevention me
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thods. Oral Pre-exposure Prophylaxis (PrEP) is proven to be highly effective as an additional prevention choice for reducing the risk of HIV acquisition, including for AGYW. Successful uptake and adherence to PrEP is critical in its effectiveness as an HIV prevention method, however, the current demand for PrEP by AGYW is low with suboptimal adherence.
Within the ESA region, there is currently great impetus to address these challenges and scale up PrEP for AGYW. A critical aspect of this is to leverage the learnings and evidence from implementation of how to improve the demand and quality of PrEP programming for this population. Improving the Quality of Pre-Exposure Prophylaxis Implementation for Adolescent Girls and Young Women in Eastern and Southern Africa examines the current efforts in the region to accelerate and scale up evidence-based PrEP delivery platforms. The implementation brief provides current knowledge and builds on WHO guidance to provide key considerations for implementation, including driving demand and improving quality, as well as focus on wider combination prevention and integration agendas.
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Weekly Epidemiological Record No 9, 2022, 97, 61–80
This position paper supersedes the 2016 publication, “Malaria vaccine: WHO position paper-2016.”1 It includes the updated WHO recommendations on the wider use of the RTS,S/AS01 vaccine for the reduction of malaria morbidity and mortality in
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children living in areas of moderate to high malaria transmission. It also incorporates findings from the evaluation of the WHO-coordinated Malaria Vaccine Implementation Programme (MVIP), recommended by SAGE and MPAG in 2015, and from additional studies since 2015.
This paper does not include findings on vaccine efficacy in infants first vaccinated at 6–12 weeks of age. Because of the lower vaccine efficacy observed in this age category, WHO did not recommend pilot implementation or RTS,S/AS01 vaccine introduction for these young infants. Recommendations2 on the use of RTS,S/AS01 vaccine were discussed by SAGE and MPAG during a joint session in October 2021; evidence presented at the meeting can be accessed at https://terrance.who.int/mediacentre/data/ sage/SAGE_eYB_Oct2021.pdf
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Hendra virus (HeV) continues to pose a serious public health concern as spillover events occur sporadically. Terminally ill horses can exhibit a range of clinical signs including frothy nasal discharge, ataxia or forebrain signs. Early signs, if detected, can include depression, inappetence, colic o
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r mild respiratory signs. All unvaccinated ill horses in areas where flying foxes exist, may potentially be infected with HeV, posing a significant risk to the veterinary community. Equivac® HeV vaccine has been fully registered in Australia since 2015 (and under an Australian Pesticides and Veterinary Medicines Authority special permit since 2012) for immunization of horses against HeV and is the most effective and direct solution to prevent disease transmission to horses and protect humans. No HeV vaccinated horse has tested positive for HeV infection. There is no registered vaccine to prevent, or therapeutics to treat, HeV infection in humans. Previous equine HeV outbreaks tended to cluster in winter overlapping with the foaling season (August to December), when veterinarians and horse owners have frequent close contact with horses and their bodily fluids, increasing the chance of zoonotic disease transmission. The most southerly case was detected in 2019 in the Upper Hunter region in New South Wales, which is Australia's Thoroughbred horse breeding capital. Future spillover events are predicted to move further south and inland in Queensland and New South Wales, aligning with the moving distribution of the main reservoir hosts. Here we (1) review HeV epidemiology and climate change predicted infection dynamics, (2) present a biosecurity protocol for veterinary clinics and hospitals to adopt, and (3) describe diagnostic tests currently available and those under development. Major knowledge and research gaps have been identified, including evaluation of vaccine efficacy in foals to assess current vaccination protocol recommendations.
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2nd edition. These guidelines include several notable changes from the first edition. For cutaneous leishmaniasis, ketoconazole has been removed from the list of treatment options; the number of Leishmania species for which there is strong evidence for the efficacy of miltefosine has increased from
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two to four; and the recommendation for intralesional antimonials is now strong. For mucosal leishmaniasis there is now a strong recommendation for use of pentavalent antimonials with or without oral pentoxifylline. For visceral leishmaniasis, the strong recommendations for use of pentavalent antimonials and amphotericin B deoxycholate are now conditional.
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Mettre fin au choléra- Feuille de route mondiale pour 2030 rend opérationnelle la nouvelle stratégie mondiale de lutte contre le choléra au niveau des pays et fournit une voie concrète vers un monde où le choléra ne représente plus une menace pour la santé publique. En mettant en œuvre la
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stratégie d’ici à 2030, les partenaires du Groupe spécial mondial de lutte contre le choléra (GTFCC) aideront les pays à réduire de 90 % les décès dus au choléra. Avec l’engagement des pays touchés par le choléra, des partenaires techniques et des donateurs, pas moins de 20 pays pourraient éliminer la transmission de la maladie d’ici 2030.
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Over the past twenty years, huge efforts made by a broad coalition of stakeholders curbed the last epidemic and brought the disease to the brink of elimination. In this paper, the latest figures on disease occurrence, geographical distribution and control activities are presented. Strong evidence in
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dicates that the elimination of sleeping sickness ‘as a public health problem’ by 2020 is well within reach. In particular, fewer than one thousand new cases were reported in 2018, and the area where the risk of infection is estimated as moderate, high or very high has shrunk to less than 200,000 km2. More than half of this area is in the Democratic Republic of the Congo. The interruption of transmission of the gambiense form, targeted by the World Health Organization (WHO) for 2030, will require renewed efforts to tackle a range of expected and unexpected challenges. The rhodesiense form of the disease represents a small part of the overall HAT burden. For this form, the problem of under detection is on the rise and, because of an important animal reservoir, the elimination of disease transmission is not envisioned at this stage.
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