PNAS | March 4, 2014 | vol. 111 | no. 9
Malaria is an important disease that has a global distribution and significant health burden. The spatial limits of its distribution and seasonal activity are sensitive to climate factors, as well as the local capacity to control the disease. Malaria is also
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one of the few health outcomes that has been modeled by more than one research group and can therefore facilitate the first model intercomparison for health impacts under a future with climate change. We used bias-corrected temperature and rainfall simulations from the Coupled Model Intercomparison Project Phase 5 climate models to compare the metrics of five statistical and dynamical malaria impact models for three future time periods (2030s, 2050s, and 2080s). We evaluated three malaria outcome metrics at global and regional levels: climate suitability, additional population at risk and additional person-months at risk across the model outputs. The malaria projections were based on five different global climate models, each run under four emission scenarios (Representative Concentration Pathways, RCPs) and a single population projection. We also investigated the modeling uncertainty associated with future projections of populations at risk for malaria owing to climate change. Our findings show an overall global net increase in climate suitability and a net increase in the population at risk, but with large uncertainties. The model outputs indicate a net increase in the annual person-months at risk when comparing from RCP2.6 to RCP8.5 from the 2050s to the 2080s. The malaria outcome metrics were highly sensitive to the choice of malaria impact model, especially over the epidemic fringes of the malaria distribution.
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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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Overview on the assessed contributions for all World Health Organization Member States As at 31 December 2021.
Mortality statistics are fundamental to public health decision making. Mortality varies by time and location, and its measurement is affected by well known biases that have been exacerbated during the COVID-19 pandemic. This paper aims to estimate excess mortality from
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the COVID-19 pandemic in 191 countries and territories, and 252 subnational units for selected countries, from Jan 1, 2020, to Dec 31, 2021.
The Lancet. 10 March 2022. doi: 10.1016/S0140-6736(21)02796-3.
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Over long periods of time, individuals and communities can adapt to their local climates. When both warmer and colder temperatures go above or below those norms rapidly, scientific evidence shows that people become vulnerable to associated health ef
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fects related to those extremes. Studies suggest that climate change will greatly increase the severity and frequency of extreme temperature conditions, leading to increases in temperature-related illness and death
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People living with HIV depend on life-saving antiretroviral therapy (ART) and access to ART must be maintained during periods of travel restrictions and lockdowns resulting from the COVID-19 pandemic. The Information note on HIV and COVID-19 address
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es common concerns people living with HIV have regarding the risks of COVID-19 and how to minimize them. For HIV programme managers and health facilities providing HIV services, it identifies key points related to ensuring uninterrupted provision of ART, while protecting clients and staff from the risk of infection with the SARS-CoV-2 virus.
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Going to work during this COVID-19 pandemic has placed frontline workers under immense and unprecedented pressure, putting their physical, mental and social well-being at risk. Exposure to excessive stress, for prolonged periods can have many harmfu
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l consequences on the emotional and mental well-being of frontline workers. This document outlines some actions that frontline workers can take to cope with stress and take care of themselves during COVID-19.
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The EU's air quality directives (2008/50/EC Directive on Ambient Air Quality and Cleaner Air for Europe and 2004/107/EC Directive on heavy metals and polycyclic aromatic hydrocarbons in ambient air) set pollutant concentrations thresholds that shall not be exceeded in a given period of time. In case
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of exceedances, authorities must develop and implement air quality management plans. These plans should aim to bring concentrations of air pollutants to levels below the limit and target values.
Selected EU standards and the World Health Organization (WHO) guidelines are summarised in the table below. These apply over differing periods of time because the observed health impacts associated with the various pollutants occur over different exposure times.
The WHO guideline values are set for the protection of health, and are generally stricter than the comparable politically agreed EU standards.
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This review focusses on the interactions between the etiologic agent of Chagas disease, Trypanosoma cruzi, and its triatomine vector. The flagellate mainly colonizes the intestinal tract of the insect. The effect of triatomines on trypanosomes is indicated by susceptibility and refractoriness phenom
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ena that vary according to the combination of the strains. Other effects are apparent in the different regions of the gut. In the stomach, the majority of ingested blood trypomastigotes are killed while the remaining transform to round stages. In the small intestine, these develop into epimastigotes, the main replicative stage. In the rectum, the population density is the highest and is where the infectious stage develops, the metacyclic trypomastigote. In all regions of the gut, starvation and feeding of the triatomine affect T. cruzi. In the small intestine and rectum, starvation reduces the population density and more spheromastigotes develop. In the rectum, feeding after short-term starvation induces metacyclogenesis and after long-term starvation the development of specific cells, containing several nuclei, kinetoplasts and flagella. When considering the effects of T. cruzi on triatomines, the flagellate seems to be of low pathogenicity. However, during stressful periods, which are normal in natural populations, effects occur often on the behaviour, eg, in readiness to approach the host, the period of time before defecation, dispersal and aggregation. In nymphs, the duration of the different instars and the mortality rates increase, but this seems to be induced by repeated infections or blood quality by the feeding on infected hosts. Starvation resistance is often reduced by infection. Longevity and reproduction of adults is reduced, but only after infection with some strains of T. cruzi. Only components of the surface coat of blood trypomastigotes induce an immune reaction. However, this seems to act against gut bacteria and favours the development of T. cruzi.
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A Supplement to the obstetrical fistula counseling curriculum
In 2014 UNICEF, WHO and the World Bank report new joint estimates of child malnutrition using available data up to 2013 The Interactive dashboard allows users to generate a variety of graphs and charts, using the newest joint estimates of prevalence and numbers for child stunting, underweight, overw
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eight, wasting and severe wasting. Users can select the different regional country groupings of the UN, MDG, UNICEF, WHO regions as well as World Bank income groups and geographic regions to present the data.
A summary of 4 pages presents the key findings for each indicator, an introduction to the dashboard and updates on methods
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Male and Female Respondents Interviewed Along the Central and the Eastern Mediterranean Routes in 2017
9,483 surveys conducted with migrants in Italy, Bulgaria, Greece, Hungary, Kosovo, Montenegro, Romania, Serbia and The former Yugoslav Republic of Macedonia, in 2017
The Lancet Published Online
October 8, 2021 https://doi.org/10.1016/ S0140-6736(21)02143-7
This manual is part of a series of guides devised by the Oxfam Public Health Engineering Team to help provide a reliable water supply for populations affected by conflict or natural disaster. The equipment is designed to be used with any or all of the following Oxfam water equipment: Water Pumping e
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quipment, Water Storage equipment, Water Filtration equipment, Water Distribution equipment, Hand-dug Well equipment, and Water Testing Kit. All are designed using available, easily transported equipment which is simple, rapidly assembled, and fully self-contained, to provide an adequate, safe water supply at moderate cost. The principles used in these packages may often be useful in long-term development projects.
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The guidelines begin with an overview of the determinants of mental health among children and adolescents before reviewing related South African policies and legislation. The document then discusses strategies to build skills among caregivers, teachers and other frontline providers of mental health
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interventions as well as those for counselling professionals. The guidelines conclude by identifying priority areas for mental health services among children and adolescents, including the prevention of child and substance abuse as well as services for those living with intellectual disabilities
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This publication explores how housing, land and property rights issues have been addressed in peace agreements concluded over the past three decades. It provides practical guidance for peace negotiators on all sides in Myanmar and outlines how addressing these rights in the peace process will build
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the groundwork needed for an eventual peace agreement or agreements in the country.
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Communicable Disease Control Branch
Communicable Disease Management Protocol – Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS), February 2010