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The Lancet Planetary Health Volume 5, ISSUE 7, e466-e478, July 01, 2021
Transmission of many infectious diseases depends on interactions between humans, animals, and the environment. Incorporating these complex processes in transmission dynamic models can help inform policy and disease
...
control interventions. We identified 20 diseases involving environmentally persistent pathogens (ie, pathogens that survive for more than 48 h in the environment and can cause subsequent human infections), of which indirect transmission can occur from animals to humans via the environment.
more
Environment International Volume 86, January 2016, Pages 14-23
Climate change refers to long-term shifts in weather conditions and patterns of extreme weather events. It may lead to changes in health threat to human beings, multiplying existing health problems. This review examines the scientific e
...
vidences on the impact of climate change on human infectious diseases. It identifies research progress and gaps on how human society may respond to, adapt to, and prepare for the related changes. Based on a survey of related publications between 1990 and 2015, the terms used for literature selection reflect three aspects — the components of infectious diseases, climate variables, and selected infectious diseases. Humans' vulnerability to the potential health impacts by climate change is evident in literature. As an active agent, human beings may control the related health effects that may be effectively controlled through adopting proactive measures, including better understanding of the climate change patterns and of the compound disease-specific health effects, and effective allocation of technologies and resources to promote healthy lifestyles and public awareness. The following adaptation measures are recommended: 1) to go beyond empirical observations of the association between climate change and infectious diseases and develop more scientific explanations, 2) to improve the prediction of spatial–temporal process of climate change and the associated shifts in infectious diseases at various spatial and temporal scales, and 3) to establish locally effective early warning systems for the health effects of predicated climate change.
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Self-care interventions are among the most promising and exciting new approaches to improve health and well-being, both from a health systems perspective and for people who use these interventions.
The World Health Organization (WHO) uses the following working definition of self-care: Self-care i
...
s the ability of individuals, families and communities to promote health, prevent disease, maintain health, and cope with illness and disability with or without the support of a health worker. The scope of self-care as described in this definition includes health promotion; disease prevention and control; self-medication; providing care to dependent persons; seeking hospital/specialist/primary care if necessary; and rehabilitation, including palliative care. It includes a range of self-care modes and approaches. While this is a broad definition that includes many activities, it is important for health policy to recognize the importance of self-care, especially where it intersects with health systems and health professionals.
more
Nat Commun 9, 5370 (2018). https://doi.org/10.1038/s41467-018-07804-8. Mycobacterium ulcerans is the causative agent of Buruli ulcer, a neglected tropical skin disease that is most commonly found in children from West and Central Africa. Despite the severity of the
...
infection, therapeutic options are limited to antibiotics with severe side effects. Here, we show that M. ulcerans is susceptible to the anti-tubercular drug Q203 and related compounds targeting the respiratory cytochrome bc1:aa3. While the cytochrome bc1:aa3 is the primary terminal oxidase in Mycobacterium tuberculosis, the presence of an alternate bd-type terminal oxidase limits the bactericidal and sterilizing potency of Q203 against this bacterium. M. ulcerans strains found in Buruli ulcer patients from Africa and Australia lost all alternate terminal electron acceptors and rely exclusively on the cytochrome bc1:aa3 to respire. As a result, Q203 is bactericidal at low dose against M. ulcerans replicating in vitro and in mice, making the drug a promising candidate for Buruli ulcer treatment.
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Personne ne va dans un établissement de soins de santé pour tomber malade. On s’y rend pour se faire soigner, pour accoucher
ou pour se faire vacciner. Cependant, des centaines de millions de personnes s’exposent à un risque accru d’infection
...
en cherchant à obtenir des soins dans des établissements de santé dépourvus de produits de première nécessité, notamment de services d’approvisionnement en eau, d’assainissement et d’hygiène, de gestion des déchets biomédicaux et de nettoyage (services WASH). L’absence de services WASH dans les établissements de santé compromet la sécurité et la dignité des patients, tout en menaçant d’exacerber la propagation d’infections résistantes aux agents antimicrobiens et en fragilisant les efforts déployés pour améliorer la santé des enfants et des mères.
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The road map 2030 was developed by WHO through an extensive global consultation, with indicators set for measuring progress against targets and milestones. This compendium of indicators provides a comprehensive and standardized listing of recommended indicators, including the 70 core indicators pres
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ented in the M&E framework. These indicators will also support reporting on strategies described in other road map companion documents to guide action against neglected tropical diseases include the sustainability framework, the global strategy on water, sanitation and hygiene, the One Health approach and the strategic framework for integrated control and elimination of skin-related neglected tropical diseases.
The purpose of this compendium is to guide monitoring and evaluation of programmes and thereby to improve their quality and effectiveness in alignment with the road map goals. It provides a standardized listing of the most widely used indicators relevant to countries, with uniformity in defining indicators to allow comparisons over time and among different programmes. Detailed metadata are provided for each of these indicators to facilitate validity, internal consistency, standardized measurement, estimation methods and comparability of data across countries.
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Pathogens . 2021 Nov 16;10(11):1493.doi: 10.3390/pathogens10111493
.Chronic manifestations of Chagas disease present as disabling and life-threatening condi-tions affecting mainly the cardiovascular and gastrointestinal systems. Although meaningful research has outlined the different molecular mech
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anisms underlying Trypanosoma cruzi’s infection and the host-parasite interactions that follow, prompt diagnosis and treatment remain a challenge, particu-larly in developing countries and also in those where the disease is considered non-endemic. This review intends to present an up-to-date review of the parasite’s life cycle, genetic diversity, virulence factors, and infective mechanisms, as well as the epidemiology, clinical presentation, diagnosis, and treatment options of the main chronic complications of Chagas disease.
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The sixteenth meeting of the Strategic and Technical Advisory Group for Neglected Tropical Diseases (STAG-NTD) was held as a hybrid meeting, 27–28 September 2022.
Dr Ren Minghui, Assistant Director-General, Universal Health Coverage/Communicable and Noncommunicable Diseases, welcomed participan
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ts to the meeting. He said the World Health Organization’s Department of Control of Neglected Tropical Diseases (WHO/NTD) was in a state of transition. Following the death of the late esteemed Director Dr Mwelecele Ntuli Malecela earlier in the year, Dr Gautam Biswas had taken over as Acting Director but would soon retire; the appointment of a new Director was under way. Owing to rotation of STAG-NTD members, this would be the last meeting for some and the first meeting for several new participants. The work however would continue with the same commitment. Discussions over the next two days would focus on critical issues regarding recovery of NTD services following the disruptions caused by coronavirus disease (COVID-19), which had impacted many health services worldwide. He looked forward to receiving the advice and guidance of STAG-N
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The objectives of the meeting were:
1. To update the current status of the disease transmission, country capacities and plans for tackling the disease.
2. To understand the epidemiology including disease distribution and risk, the models
for estimating under-detection, the geographical variati
...
ons of in clinical presentation,
the roles of domestic and wild animal reservoirs and the subsequent different
transmission patterns and control approaches, including vector control.
3. To update current research and development efforts for improving diagnostic and
treatment tools.
4. To define the goals for achieving the control of r-HAT, the need for a multisectoral
approach and to discuss the strategy for controlling r-HAT and the coordination
mechanisms.
more
The Fifty-first World Health Assembly adopted resolution WHA51.11 in 1998, which targets the
global elimination of trachoma as a public health problem by 2020 (1). The strategy recommended
to achieve that goal is encapsulated by the acronym “SAFE”, which represents: Surgery for
individuals wi
...
th trachomatous trichiasis (TT; the late blinding stage of trachoma); and Antibiotics,
Facial cleanliness and Environmental improvement (2). The A, F and E interventions are delivered to
entire districts in which active (inflammatory) trachoma is common in order to treat ocular infection
with Chlamydia trachomatis, the causative organism of trachoma, and sustainably reduce its
transmission.
more
Stunting as a Risk Factor of Soil-Transmitted Helminthiasis in Children: A Literature Review
Fauziah, N.; Ar-Rizqi, M.A.; Hana, S. et al.
Interdisciplinary Perspectives on Infectious Diseases
(2022)
CC
As a high-burden neglected tropical disease, soil-transmitted helminth (STH) infections remain a major problem in the world, especially among children under five years of age. Since young children are at high risk of being infected, STH infection ca
...
n have a long-term negative impact on their life, including impaired growth and development. Stunting, a form of malnutrition in young children, has been long assumed as one of the risk factors in acquiring the STH infections. However, the studies on STH infection in children under five with stunting have been lacking, resulting in poor identification of the risk. Accordingly, we collected and reviewed existing related research articles to provide an overview of STH infection in a susceptible population of stunted children under five years of age in terms of prevalence and risk factors. There were 17 studies included in this review related to infection with Ascaris lumbricoides, Trichuris trichiura, hookworm, and Strongyloides stercoralis from various countries. The prevalence of STH infection in stunted children ranged from 12.5% to 56.5%. Increased inflammatory markers and intestinal microbiota dysbiosis might have increased the intensity of STH infection in stunted children that caused impairment in the immune system. While the age from 2 to 5 years along with poor hygiene and sanitation has shown to be the most common risk factors of STH infections in stunted children; currently there are no studies that show direct results of stunting as a risk factor for STH infection. While stunting itself may affect the pathogenesis of STH infection, further research on stunting as a risk factor for STH infection is encouraged.
more
The Transformation Agenda (TA) ushered in an ambitious reform process intended to transform the World Health Organization (WHO) into an organization that is proactive, results-driven, accountable and which meets stakeholder expectations, towards transforming and improving public health services in t
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he African Region. It aimed to achieve a WHO that is pro-results, which optimally and creatively targets technical work as well as make operations more responsive, with greater effectiveness in both communications and partnerships. The Africa Region has been the epicentre of the human immunodeficiency virus (HIV) epidemic and it’s one of the leading causes of disease and death on the continent. The WHO, with partners, has worked tirelessly for many years to control the threat and reduce the negative impact of the disease. Since the early 2000s, significant progress has been made in the global fight against the scourge of HIV. However, the WCA subregion was falling concerningly behind ESA on several key indicators of progress. In 2016, the WHO joined UNAIDS, UNICEF and other partners in a call for a strong and urgent response to support WCA countries to develop catch-up plans to triple and fast-track ART coverage, to enable the region to catch up with ESA by the end of 2020. Implementation of a widespread test-and-treat strategy, coupled with the scale-up of differentiated service delivery (DSD) and mobilization of requisite funding, accelerated WCA’s progress towards this goal. The HIV treatment catch-up and fast-track plan has achieved its target of seeing the West and Central African region (WCA) catch up with the Eastern and Southern African region’s (ESA) antiretroviral coverage rate of 78% in 2021, albeit later than the 2020 target time frame. A 33% improvement was achieved in WCA, against 21% in ESA, between 2015–2020. WCA achieved a significant 42% increase, compared to ESA’s 23%, between 2015 and 2021, to see WCA draw level with ESA at 78%. In the Democratic Republic of the Congo (DRC) alone, progress of up to 47% was observed between 2015 and 2020, for example. In addition, 1.6 million more People Living with HIV (PLHIV) were enrolled on antiretroviral treatment (ART) between 2015 and 2020.
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I examine the effectiveness of donors in targeting the highest burden of malaria in the Democratic Republic of Congo when health information structure is fragmented. I exploit local variations in the burden of malaria induced by mining activities as well as financial and epidemiological data from he
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alth facilities to estimate how local aid is matching local health needs. Using a regression discontinuity design, I find significant but quantitatively small variations in aid to health facilities located within mining areas. Comparing local aid with the additional cost of treatment and prevention associated with the increased risk of malaria transmission, I find suggestive evidence that local populations with the highest burden of the disease receive a proportionately lower share of aid compared to neighbouring areas with reduced exposure to malaria infection. The evidence of disparities in the allocation of aid for malaria supports the view that donors may have inaccurate information about local population needs.
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Cardiovascular disease (CVD) is the leading cause of global deaths, with the majority occurring in low- and middle-income countries (LMIC). The primary and secondary prevention of CVD is suboptimal throughout the world, but the evidence-practice gaps are much more pronounced in LMIC. Barriers at the
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patient, health-care provider, and health system level prevent the implementation of optimal primary and secondary prevention. Identification of the particular barriers that exist in resource-constrained settings is necessary to inform effective strategies to reduce the identified evidence-practice gaps. Furthermore, targeting modifiable factors that contribute most significantly to the global burden of CVD, including tobacco use, hypertension, and secondary prevention for CVD will lead to the biggest gains in mortality reduction. We review a select number of novel, resource-efficient strategies to reduce premature mortality from CVD, including: (1) effective measures for tobacco control; (2) implementation of simplified screening and management algorithms for those with or at risk of CVD, (3) increasing the availability and affordability of simplified and cost-effective treatment regimens including combination CVD preventive drug therapy, and (4) simplified delivery of health care through task-sharing (non-physician health workers) and optimizing self-management (treatment supporters). Developing and deploying systems of care that address barriers related to the above, will lead to substantial reductions in CVD and related mortality.
more
Diphtheria is caused by Corynebacterium species, mostly by toxin-producing Corynebacterium diphtheriae and rarely by toxin-producing strains of C. ulcerans and C. pseudotuberculosis. The most common type of diphtheria is classic respiratory diphtheria, whereby the exotoxin produced characteristicall
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y causes the formation of a pseudomembrane in the upper respiratory tract and damages other organs, usually the myocardium and peripheral nerves. Acute respiratory obstruction, acute systemic toxicity, myocarditis and neurologic complications are the usual causes of death. The infection can also affect the skin (cutaneous diphtheria). More rarely, it can affect mucous membranes at other non-respiratory sites, such as genitalia and conjunctiva.
C. diphtheriae is transmitted from person to person by intimate respiratory and direct contact; in contrast, C. ulcerans and C. pseudotuberculosis are zoonotic infections, not transmitted person-to-person. The incubation period of C. diphtheriae is two to five days (range 1– 10 days). A person is infectious as long as virulent bacteria are present in respiratory secretions, usually two weeks without antibiotics, and seldom more than six weeks. In rare cases, chronic carriers may shed organisms for six months or more. Skin lesions are often chronic and infectious for longer periods. Effective antibiotic therapy (penicillin or erythromycin) promptly terminates shedding in about one or two days.
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The burden of diabetes is enormous, positioning it as one of the main challenges facing public health today. Currently, it is estimated that 62 million people are living with diabetes in the Region of the Americas and projections show its prevalence will continue rising over the following years. The
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Region shows the highest number of years of healthy life lost (through either disability or premature death) due to diabetes worldwide. The high costs associated with its treatment produce a heavy economic burden. Its complications can seriously affect the quality of life of people living with diabetes, their families, and society and overload health systems. This report shows the latest internationally comparable data on diabetes and its main risk factors by year, country, and sex. It also includes a summary of the countries health systems’ response to diabetes, including national plans, targets, surveillance, guidelines, and access to essential drugs and technologies, and synthesizes information about diabetes-related complications and the close relationship between diabetes and other pathologies, such as cardiovascular diseases, tuberculosis, and COVID-19. The data presented here reveal that, despite advances in national responses, diabetes continues to expand, and our response remains insufficient. This report aims to draw attention to the urgent need to strengthen efforts to prevent, diagnose, and control diabetes in the Region of the Americas.
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Effective malaria case management requires quick access to diagnostics and antimalarial treatments to reduce illness and death. Artemisinin-based combination therapy (ACT) has been essential to malaria treatment since 2001, as it combines artemisinin for rapid parasite reduction with a partner drug
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to ensure complete cure. However, resistance to antimalarial drugs, where parasites survive standard doses, threatens malaria control.
more
Millennium Development Goal 8E aims for affordable access to essential medicines. Essential medicines, as defined by WHO, are those that “satisfy the health-care needs of the majority of the population” and that should therefore “be available at all times in adequate amounts”. However, there
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is a category of medicines that faces a unique challenge in terms of availability. These are the medicines governed by the international conventions on narcotic and psychotropic substances. “Controlled medicines” is the common definition for pharmaceuticals whose active principles are listed under the 1961 United Nations Single Convention on Narcotic Drugs as amended by the 1972 Protocol, such as morphine and methadone; the 1971 United Nations Convention on Psychotropic Substances, such as diazepam and buprenorphine; and the 1988 United Nations Convention against Illicit Traffic in Narcotic Drugs and Psychotropic Substances, such as ergometrine and ephedrine. The conventions list substances in “Schedules” according to their different levels of potential for abuse and harm, and the commensurate severity of control measures to be applied by countries.
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This report investigates the impact of potential misclassification of samples on HIV prevalence estimates for 23 surveys conducted from 2010-2014. In addition to visual inspection of laboratory results, we examined how accounting for potential misclassification of HIV status through Bayesian latent
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class models affected the prevalence estimates. Two types of Bayesian models were specified: a model that only uses the individual dichotomous test results and a continuous model that uses the quantitative information of the EIA (i.e., the signal-to-cutoff values). Overall, we found that adjusted prevalence estimates matched the surveys’ original results, with overlapping uncertainty intervals. This suggested that misclassification of HIV status should not affect the prevalence estimates in most surveys. However, our analyses suggested that two surveys may be problematic. The prevalence could have been overestimated in the Uganda AIDS Indicator Survey 2011 and the Zambia Demographic and Health Survey 2013-14, although the magnitude of overestimation remains difficult to ascertain. Interpreting results from the Uganda survey is difficult because of the lack of internal quality control and potential violation of the multivariate normality assumption of the continuous Bayesian latent class model. In conclusion, despite the limitations of our latent class models, our analyses suggest that prevalence estimates from most of the surveys reviewed are not affected by sample misclassification.
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More time or more money to improve nutrition in Benin Republic?
M. C. D. N. Vodouhe, L. Fakambi
Institut National des Recherches Agricoles du Bénin (INRAB)
(2015)
C2
Children malnutrition eradication in developing countries is a real challenge, especially among
vulnerable population. There are so many effort towards women (who are the main care providers)
socio-economic situation in order to improve their children nutrition. This article aims to identify the
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impact of mothers’ activities on child nutrition and care. Interviews were used to collect data from
mothers of children less than 5 years old. Pearson correlation test and regression models were
performed to highlight relation and to identify the main factors that affect child nutrition and care. The
nutritional statuses of children show a high prevalence of underweight (38.46%), emaciation (25.17%)
and stunting (23.77%). Statistic results show that a child whose mother has food processing as main
activity has 2,322 more times to not suffer from emaciation malnutrition compared to a child whose
mother has trade as main activity. A child whose mother has high revenue has 1.463 more times to
not be suffering from stunting malnutrition compared to a child whose mother has lower revenue. A
child whose father has fishing as main activity has 8,4 more chance to not be suffering from stunting
malnutrition compared to a child whose father has another activity as main activity. A child whose
father is present in the household has 8.11 more chance to not suffer from stunting malnutrition
compared to a child whose father is absent. A child from mother who has food processing as main
activity is 2,464 more times preserved from fever compared to a child from mother whose main activity
is trade. Moreover child position, child feeding with porridge, child nursing are correlated with mother
activity. This situation is justified by the fact that mother need money to improve child nutrition and
health but they are also confronted to the fact that those activity that provide significant money are
sometime time consuming and not permit to take care of children in term of feeding practices, hygiene
control etc. Therefore it is important that intervention towards women take in consideration those
factors (money and time) but also the family in the whole.
more