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Schistosomiasis is an acute and chronic parasitic disease caused by blood flukes (trematode worms) of the genus Schistosoma. Estimates show that at least 251.4 million people required preventive treatment in 2021. Preventive treatment, which should be repeated over a number of years, will reduce and
...
prevent morbidity. Schistosomiasis transmission has been reported from 78 countries. However, preventive chemotherapy for schistosomiasis, where people and communities are targeted for large-scale treatment, is only required in 51 endemic countries with moderate-to-high transmission.
more
Les progrès remarquables réalisés dans la lutte contre la forme à T. b. gambiense reposent sur le dépistage et le traitement curatif, une stratégie qui interrompt la transmission en réduisant le réservoir de parasites chez l’être humain. Parfois, cette
approche a été combinée avec des
...
activités de lutte antivectorielle. L’objet de ces lignes directrices est donc de la plus haute importance pour la poursuite des progrès en vue de l’élimination de la THA.
more
The development of this target product profile (TPP) was led by the WHO Department of Control of Neglected Tropical Diseases (NTD) following standard WHO guidance for TPP development. In order to identify and prioritize diagnostic needs, a WHO NTD Diagnostics Technical Advisory Group (DTAG) was form
...
ed, and different subgroups were created to advise on specific NTDs, including a subgroup working on the human African trypanosomiasis (HAT) diagnostic innovation needs. This group of independent experts included leading scientists, public health officials and endemic-country end-user representatives. Standard WHO Declaration of Interest procedures were followed. A landscape analysis of the available products and of the development pipeline was conducted, and the salient areas with unmet needs were identified.
more
Schistosomiasis is a public health problem in tropical and subtropical regions of Africa, Asia, the Caribbean and South America. It is one of the neglected tropical diseases (NTDs) - a group of diseases and conditions that affect particularly low-in
...
come populations, worldwide.
Last year, WHO launched a new road map for 2021-2030 that aims to end the suffering from NTDs by 2030, in line with the Sustainable Development Goals. The road map specifically targets the elimination of schistosomiasis as a public health problem, globally.
This guideline provides evidence-based recommendations in the following areas: prevalence thresholds, target age groups and frequency of PC, establishment of WASH and snail control activities to support control and elimination of schistosomiasis, diagnostic tests for the assessment of schistosomiasis infection in animal reservoirs, in snail hosts, and in humans.
more
Localized cutaneous leishmaniasis and its evolving forms (diffuse cutaneous leishmaniasis, mucosal leishmaniasis and cutaneous leishmaniasis recidivans), together with the sequela of visceral leishmaniasis (post-kala-azar dermal leishmaniasis), account for about one million cases of dermal leishmani
...
ases per year worldwide. Although not lethal, the dermal leishmaniases cause chronic, disfiguring skin lesions which are an important cause of morbidity and stigma.
more
Since 2000, concerted efforts by national programmes, supported by public–private partnerships, nongovernmental organizations, donors and academia under the auspices and coordination of the World Health
...
Organization (WHO), have produced important achievements in the control of human African trypanosomiasis (HAT). As a consequence, the disease was targeted for elimination as a public health problem by 2020. The Sixty-sixth World Health Assembly endorsed this goal in resolution WHA66.12 on neglected tropical diseases, adopted in 2013.
National sleeping sickness control programmes (NSSCPs) are core to progressing control of the disease and in adapting to the different epidemiological situations. The involvement of different partners, as well as the support and trust of long-term donors, has been crucial for the achievements.
more
Un comité OMS d’experts sur la trypanosomiase humaine africaine (THA) : lutte et surveillance, s’est réuni à Genève (Suisse), du 22 au 26 avril 2013. Le Dr H. Nakatani, sous-directeur général pour le VIH/SIDA, la tuberculose, le paludisme et les maladies tropicales négligées, a ouvert la
...
réunion au nom du Dr M. Chan, directeur-général de l’OMS.
La THA est une maladie qui afflige les populations rurales de l’Afrique, là où prolifère la mouche tsé-tsé (ou glossine), vecteur des trypanosomes qui en sont la cause. On distingue deux formes de THA : la forme à T. b. gambiense ou forme gambienne, endémique en Afrique de l’Ouest et en Afrique centrale et qui
représente actuellement 95 % des cas, et la forme à T. b. rhodesiense ou forme rhodésienne, endémique en Afrique de l’Est et en Afrique australe, à laquelle sont dus les 5 % restants.
more
La schistosomiase est une parasitose aiguë et chronique provoquée par des vers (trématodes) du genre Schistosoma. Selon les estimations, au moins 251,4 millions de personnes avaient besoin d’un traitement préventif en 2021. Le traitement préventif, qui devrait être renouvelé pendant un cert
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ain nombre d’années, permettra de réduire et de prévenir la morbidité. La transmission de la schistosomiase est avérée dans 78 pays. Cependant, la chimioprophylaxie de la maladie, dont le but est de traiter à grande échelle les populations et les communautés, n’est nécessaire que dans 51 pays d’endémie où la transmission est de modérée à forte.
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La esquistosomiasis es una enfermedad parasitaria aguda y crónica causada por duelas sanguíneas (trematodos) del género Schistosoma. Se calcula que al menos 251,4 millones de personas necesitaron tratamiento profiláctico en 2021. El tratamiento profiláctico, que se debería repetir durante algu
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nos años, permite reducir y prevenir la morbilidad. Hay constancia de la transmisión de la enfermedad en 78 países. Sin embargo, la quimioprofilaxis para la esquistosomiasis, en la que se aplica un tratamiento a gran escala a personas y comunidades, solamente se requiere en 51 países en los que la enfermedad es endémica y tienen una transmisión de moderada a alta.
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داء البلهارسيات هو مرض طفيلي حاد ومزمن تسبّبه الديدان المثقوبة الدموية (المثقوبات) من جنس البلهارسية. وتشير التقديرات إلى أن 251.4 مليون شخص على الأقل كانوا بحاجة إلى
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لعلاج الوقائي من داء البلهارسيات في عام 2021. ومن شأن العلاج الوقائي، الذي ينبغي تكراره على مدى عدة سنوات، أن يحد من المراضة ويمنعها. وقد أُبلغ عن سريان المرض في 78 بلداً. ومع ذلك، فإن العلاج الكيميائي الوقائي لداء البلهارسيات الذي يُستهدف فيه الأشخاص والمجتمعات المحلية بالعلاج على نطاق واسع، لا يلزم إلا في 51 بلداً موطوناً يشهد مستويات سريان المرض المتوسطة أو العالية.
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Шистосомоз является острой и хронической паразитарной болезнью, вызываемой кровяными сосальщиками (трематодными червями) из рода Schistosoma. В 2021 г. количество нуждаю
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ихся в профилактическом лечении шистосомоза оценивалось на уровне не менее 251,4 млн человек. Профилактическое лечение, которое необходимо повторять через несколько лет, снижает и предотвращает заболеваемость шистосомозом. Передача шистосомоза регистрируется в 78 странах. Однако профилактическая химиотерапия в рамках широкомасштабного лечения шистосомоза среди людей и общин требуется только в 51 эндемичной стране с умеренными и высокими показателями передачи инвазии.
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About a year after infection, a painful blister forms – 90% of the time on the lower leg – and one or more worms emerge accompanied by a burning sensation. To soothe the burning pain, patients often immerse the infected part of the body in water. The worm(s) then releases thousands of larvae (ba
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by worms) into the water. These larvae reach the infective stage after being ingested by tiny crustaceans or copepods, also called water fleas.
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Global efforts to eradicate dracunculiasis have continued to progress, with only 542 cases reported in 2012, as compared with 1058 in 2011. It is a long thread-like worm. It is transmitted exclusively when people drink water contaminated with parasite-infected water fl eas. It is now found in some o
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f the most deprived regions of Africa.
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Yaws is a chronic skin infection characterized by papillomas (noncancerous lumps) and ulcers. It is caused by the bacterium Treponema pallidum subspecies pertenue, which belongs to the same group of bacteria that causes venereal syphilis.
Yaws forms part of a group of chronic bacterial infections commonly known as the endemic treponematoses. These diseases are caused by spiral bacteria of the genus Treponema, which also includes endemic syphilis (bejel) and pinta. Yaws is the most common of these three infections.
Yaws is a disfiguring non-venereal disease caused by infection with the spirochaete. Treponema pallidum subspecies pertenue which is closely related to the causative agent of syphilis and those of the other endemic treponematoses, bejel and pinta. The disease is endemic in certain areas of the
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World Health Organization (WHO) African, South-East Asia and Western Pacific regions. Of the neglected tropical diseases identified for elimination and eradication, yaws is one of two diseases targeted for eradication. In 1949, the Second World Health Assembly adopted resolution WHA2.36, which addresses yaws, bejel and pinta as major public health problems that need attention.
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In May the Sixty-sixth World Health Assembly adopted resolution WHA66.12 (1) on 17 neglected tropical diseases (NTDs). Among other measures, the resolution urges Member States to:
• ensure count
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ry ownership of prevention, control, elimination and eradication programmes;
• expand and implement interventions and advocate for predictable, long-term international financing for activities related to control and capacity strengthening;
• integrate control programmes into primary health-care services and existing programmes;
• ensure optimal programme management and implementation;
• achieve and maintain universal access to interventions and reach the targets of the roadmap.
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There are 3 main forms of leishmaniases: visceral (the most serious form because it is almost always fatal without treatment), cutaneous (the most common, usually causing skin ulcers), and mucocutaneous (affecting mouth, nose and throat).
Leishmaniasis is caused by protozoan parasites which are tra
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nsmitted by the bite of infected female phlebotomine sandflies.
The disease affects some of the world’s poorest people and is associated with malnutrition, population displacement, poor housing, a weak immune system and lack of financial resources.
An estimated 700 000 to 1 million new cases occur annually.
Only a small fraction of those infected by parasites causing leishmaniasis will eventually develop the disease.
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Course information
Yaws is targeted for eradication by WHO in the 2021-2030 NTD Roadmap. It is therefore crucial to know how to identify cases, design and implement activities to eradicate the disease at the community level.
In the context of integration of skin NTDs it is vital to learn to recogn
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ize a disease targeted for eradication. At the individual level yaws lesions may mimic other skin diseases. At the community level, it is key to know how to design and implement the total community treatment strategy and monitor its impact. This course aims at providing health workers with the basic knowledge to understand the epidemiology, diagnosis, treatment, impact, eradication strategy and reporting of yaws.
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Onchocerciasis used to be an important public health problem in Africa, with over 37 million people infected and millions suffering from debilitating skin disease, terrible itching, impaired vision and
blindness. But the epidemiological situation h
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as improved dramatically over the last two decades. Community directed treatment with ivermectin has effectively brought the disease under control in most endemic areas where onchocerciasis is no longer a public health risk.
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