Chagas disease, or American trypanosomiasis, is an illness that can cause serious heart and stomach problems. It is caused by a parasite. Chagas disease is common in Latin America, especially in poor, rural areas. It can also be found in the United States, most often in people who were infected befo...re they moved to the U.S.
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The AHO Malaria Fact Sheet gives a brief overview of malaria as a preventable and curable disease caused by Plasmodium parasites, mainly affecting sub-Saharan Africa. It highlights symptoms like fever and chills, notes vulnerable groups such as young children and pregnant women, and emphasizes the n...eed for targeted prevention and treatment.
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Malaria in children presents significant clinical challenges, with variations in presentation based on the malaria parasite involved and the child's underlying health conditions. The World Health Organization reports high incidence rates, particularly in sub-Saharan Africa, and emphasizes the import...ance of effective treatment strategies. First-line treatment often involves Artemether-Lumefantrine (ALu), while severe malaria requires careful management and the use of intravenous Quinine. Management protocols emphasize early diagnosis and the monitoring of severe complications to reduce mortality.
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Le paludisme reste un enjeu majeur de santé publique dans de nombreux pays à faible et moyen revenu. En 2018, l’OMS estimait à environ 228 millions le nombre de cas de paludisme, responsable de 405 000 décès principalement en Afrique subsaharienne. L’utilisation intensive des outils antipal...udiques disponibles a permis de réduire significativement la transmission dans de nombreuses régions endémiques au cours de la dernière décennie. Cependant, l’éradication du paludisme dans les zones à forte transmission reste une perspective lointaine.
Ce MOOC offre aux participants un aperçu complet des diverses disciplines et questions clés de la recherche sur le paludisme. Il aborde notamment la biologie cellulaire et moléculaire des parasites, la recherche clinique sur le terrain et en milieu hospitalier, les technologies génomiques avancées, la recherche translationnelle sur les nouveaux outils de lutte contre les parasites et vecteurs (médicaments, vaccins), l’épidémiologie du paludisme et la recherche clinique en santé publique. Le cours est accessible à toute personne intéressée par le paludisme, à condition de posséder une formation initiale en sciences de la vie.
Ce MOOC fait partie des MOOCs du Diplôme des Maladies Infectieuses de l’Institut Pasteur (DNM2IP).
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The number of reported cases of acute African trypanosomiasis (sleeping sickness). The disease is caused by parasitesthat are spread by tsetse flies and other insects. The disease is typically fatal if not treated.
Website last accessed on 10.04.2023
The Chagas disease is frequently referred to as the effects that the parasite Trypanosoma cruzi (T. cruzi) has on people’s health. However, from our perspective, Chagas is much more than that: it is a complex socioenvironmental health problem in which elemen...ts of different nature converge and interact. The biomedical and epidemiological aspects, which are most frequently addressed, are only a piece of the puzzle that needs to be complete in order to understand Chagas in all its complexity. Social, environmental, economic, political, cultural, and educational elements turn out to be essential in comprehending the magnitude of the problem without prejudice or stigmatizations.
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Schistosomiasis, also known as Bilharzia, is an infection caused by a parasitic worm that lives in fresh water in subtropical and tropical regions. Schistosomiasis is second only to malaria as the most devastating parasitic disease. The parasites that cause schistosomiasis live in certain types of f...reshwater snails. The infectious form, known as cercariae, emerge from the snail and then contaminate the water. People become infected when their skin comes into contact with the contaminated freshwater. Most human infections are caused by Schistosoma mansoni, Schistosoma haematobium, or Schistosoma japonicum.
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Human African trypanosomiasis (HAT) has been an alarming global public health issue. The disease affects mainly poor and marginalized people in low-resource settings and is caused by two subspecies of haemoflagellate parasite, Trypanosoma brucei and transmitted by tsetse flies. Progress made in HAT ...control during the past decade has prompted increasing global dialogue on its elimination and eradication. The disease is targeted by the World Health Organization (WHO) for elimination as a public health problem by 2020 and to terminate its transmission globally by 2030, along-side other Neglected Tropical Diseases (NTD). Several methods have been used to control tsetse flies and the disease transmitted by them. Old and new tools to control the disease are available with constraints.
Currently, there are no vaccines available. Efforts towards intervention to control the disease over the past decade have seen considerable progress and remarkable success with incidence dropping progressively, reversing the upward trend of reported cases. This gives credence in a real progress in its elimination. This study reviews various control measures, progress and a highlight of control issues, vector and parasite barriers that may have been hindering progress towards its elimination.
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DNA studies of Egyptian mummies shows evidence of the existence of Schistosomiasis about 5000 years ago. Schistosomiasis is increasing in prevalence, affecting nearly 10% of the world’s population and ranking second only to malaria as a cause of morbidity & mortality.
Schistosoma haematobium are... found in tropical Africa & part of southwest Asia.
Schistosoma mansoni are found in tropical Africa, part of southwest Asia, south America & Caribbean islands.
Schistosoma japonicum are found in parts of Japan, China, Philippines, India & part of southeast Asia.
Blood flukes are known as schistosomes because of the "split body" on the ventral side of the male, in which the female is held during insemination and egg laying.
Man is the definite host harbouring adult parasites, and fresh water snails are intermediate hosts.
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Human African trypanosomiasis (HAT), or sleeping sickness, is caused by trypanosome parasites that are transmitted by tsetse flies. HAT is found only in sub-Saharan Africa. Two subspecies of Trypanosoma brucei cause disease: T. b. gambiense in West and Central Africa, and T. b. rhodesiense in East A...frica.
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Antimicrobial resistance has become a serious public health threat for effective treatment of an ever increasing range of infections caused by bacteria, parasites, viruses and fungi. When infections can no longer be treated by first-line antibiotics, other antibiotics must be used, which are both mo...re expensive and more toxic. Treatment and hospitalization is prolonged, and patients undergoing operations and other medical procedures are more vulnerable to infections. All this imposes a huge burden on health care systems and on the economy of countries. This is a major challenge to the health system in Mauritius which provides health care free of user cost to the whole population.
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Map of Distribution of Paragonimiasis, worldwide latest year available.
Foodborne trematodes are a group of diseases that include the parasites Clonorchis, Opisthorchis, Fasciola and Paragonimus. These parasitic flukes have a complex life cycle involving diverse definitive hosts and one or two inte...rmediate hosts. Foodborne trematodes cause infection in humans via the consumption of contaminated food (raw fish, crustaceans or vegetables). Infection can result in severe liver and lung disease and together these diseases are estimated to cause 2 million life years lost to disability and death worldwide every year.
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Lymphatic filariasis, commonly known as elephantiasis, is a neglected tropical disease. Infection occurs when filarial parasites are transmitted to humans through mosquitoes. Infection is usually acquired in childhood causing hidden damage to the lymphatic system.
Dengue is a significant public health problem. There are four dengue virus serotypes identified; however, its diagnosis is difficult due to the existence of many viruses, bacteria, and parasites producing the same clinical presentation, being present in the same geographical area and even producing ...coinfections. Therefore, determining whether a person has, had, or is infected with dengue virus is of great importance. In order to do so, direct and indirect laboratory tests have been developed to identify the virus or part of its structure that generally detects the antibody response. These techniques are used for diagnosis, epidemiological studies, monitoring, assessment and production of vaccines and antivirals, etc. They range from the use of cell cultures, animal models, inoculation by insects, and serology tests to the use of detection molecular tests and quantification of genetic material that are described in this chapter herein, a brief explanation of this methodology, its strengths and weaknesses, and its application in the dengue research.
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Principaux faits
D’après les estimations, 6 à 7 millions de personnes dans le monde sont infectées par Trypanosoma cruzi (T. Cruzi), le parasite responsable de la maladie de Chagas. La plupart de ces personnes vivent en Amérique latine.
La transmission à l’être humain se fait principalem...ent, en Amérique latine, par l’intermédiaire d’un insecte appelé triatome, qui peut être porteur de T. cruzi.
Parmi les autres modes de transmission de la maladie de Chagas, figurent : la transmission orale (par voie alimentaire), la transfusion de sang ou de produits sanguins, la transmission mère-enfant (congénitale), la transplantation d’organes et les accidents de laboratoire.
La maladie de Chagas ne touchait auparavant que des zones rurales de la Région des Amériques, et surtout de l’Amérique latine. Ces dernières décennies, toutefois, les mouvements de population ont fait que la plupart des personnes infectées sont des habitants de zones urbaines (urbanisation) et que la maladie s’est propagée à d’autres continents (où T. cruzi se transmet par des voies non vectorielles).
L’infection à T. cruzi est curable si un traitement est instauré rapidement après l’infection.
Chez les personnes infectées de façon chronique, un traitement antiparasitaire peut éventuellement prévenir ou enrayer la progression de la maladie, et éviter sa transmission, notamment de la mère à l’enfant.
Jusqu’à 30 % des personnes infectées de façon chronique présentent des troubles cardiaques, et jusqu’à 10 % d’entre elles souffrent de troubles digestifs et/ou neurologiques, ce qui peut imposer un traitement particulier.
Les principales méthodes de prévention de la maladie de Chagas en Amérique latine sont la lutte antivectorielle ainsi que d’autres stratégies visant à réduire la transmission vectorielle.
Dans le monde entier, le dépistage sanguin joue un rôle crucial dans la prévention de l’infection par transfusion ou transplantation d’organes.
Il est essentiel de détecter et de traiter l’infection chez les femmes et les filles en âge de procréer, ainsi que de soumettre tout nouveau-né et ses frères et sœurs à un dépistage dans le cas où la mère est infectée et n’a jamais reçu de traitement antiparasitaire.
Certains facteurs socio-économiques et environnementaux influent fortement sur la maladie de Chagas, dont la propagation et les différentes dimensions interdépendantes justifient la nécessité de mettre en œuvre des stratégies de lutte multisectorielles.
Quelques pays ont mis en place la notification et la surveillance des cas aigus et chroniques et des voies de transmission actives, qui sont essentielles à la lutte contre la maladie de Chagas.
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La filariose lymphatique, communément appelée éléphantiasis, est une maladie tropicale négligée. L’infection se produit lorsque les parasites filaires responsables de la maladie sont transmis à l’homme par des moustiques. Généralement contractée dans l’enfance, cette infection provoq...ue une altération non apparente du système lymphatique.
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Chagas disease, also known as American trypanosomiasis, is a potentially life-threatening illness caused by the protozoan parasite Trypanosoma cruzi. About 6–7 million people worldwide are estimated to be infected with T. cruzi. The disease is found mainly in endemic areas of 21 continental Lati...n American countries, where it has been mostly transmitted to humans and other mammals by contact with faeces or urine of triatomine bugs (vector-borne), known as kissing bugs, among many other popular names, depending on the geographical area.
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Issue Brief 31: Antimicrobial resistance (AMR) can occur when viruses, bacteria, parasites and fungi change over time. There is no longer a response to medicines, and the infection treatment gets really difficult which increases the risk of a disesase spread, which can lead to severe health problems.... AMR is an increasing threat to global public health worldwide that requires cross-sectional and cross-disciplinary action. It is present in every country and is spurred by several human-made factors, including over- and/or inadequate use of antibiotics, poor hygiene and infection prevention control, and excessive usage of antibiotics outside the health care sector e.g. in life stock production.
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Lymphatic filariasis, commonly known as elephantiasis, is a neglected tropical disease. Infection
occurs when filarial parasites are transmitted to humans through mosquitoes. When a mosquito
with infective stage larvae bites a person, the parasites are deposited on the person’s skin from
where ...they enter the body. The larvae then migrate to the lymphatic vessels where they develop
into adult worms in the human lymphatic system.
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The document "Prevansyon kont Diare" provides guidance on preventing and managing diarrhea. It explains that diarrhea, caused by pathogens like viruses, bacteria, and parasites, can lead to severe dehydration if untreated. Symptoms include vomiting, fever, and loss of appetite, with severe cases req...uiring urgent medical care.
To prevent diarrhea, the document emphasizes using treated or boiled water, washing hands with soap, cooking food thoroughly, and cleaning fruits and vegetables with safe water. It also provides a recipe for Oral Rehydration Solution (ORS) to combat dehydration: mix 1 liter of boiled or treated water with 8 teaspoons of sugar, 1 teaspoon of salt, and a pinch of baking soda. This solution should be consumed while seeking medical attention.
The document serves as an educational resource to promote hygiene and provide simple, effective solutions for preventing and managing diarrhea.
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