Neglected Tropical Diseases - Sub-Saharan Africa


Book Description

This book provides an overview on the major neglected tropical diseases (NTDs) occurring in Sub-Saharan Africa, such as Leishmaniasis, Buruli Ulcer and Schistosomiasis. In well-structured chapters epidemiology and biology of these parasitic diseases will be discussed in detail. Further, diagnostics and therapeutic approaches as well as prevention strategies will be reviewed. The book will be of interest to basic researchers and clinicians engaged in infectious disease, tropical medicine, and parasitology, and a must-have for scientists specialized in the characteristics of the Sub-Saharan region.




The Control of Schistosomiasis


Book Description

A comprehensive guide to the technical and practical factors that need to be considered when designing and implementing programmes for the control of schistosomiasis. Noting the success of strategies focused on morbidity control, the report shows how the spectrum of programme goals can now be broadened to include reductions in the prevalence and intensity of established infections and decreases in the intensity of transmission. Throughout, emphasis is placed on knowledge and experiences that can help programme managers establish feasible goals and then select control options in line with the form of infection, its public health importance, the degree and type of morbidity, available resources, and integration into the primary health care system. Information is specific to the different types of schistosomiasis and the distinctive epidemiological features, clinical manifestations, and response to treatment of each. The report has three main parts. The first, which is devoted to strategies for control, gives programme managers a concise, yet complete review of all factors that need to be considered when establishing priorities and deciding on the most appropriate options for control. Emphasis is placed on the many recent advances, including experiences with praziquantel, that have strengthened the tools available for prevention, diagnosis, treatment, and cure. While noting the severe financial constraints faced in many endemic countries, the report cites recent findings and experiences that make it possible for each endemic country to take action against schistosomiasis, even when resources are scarce and health services limited. The second part gives specialists a detailed state-of-the-art review of all technical developments relevant to control. Separate sections describe the distinctive patterns of morbidity and mortality seen in each form of infection, update knowledge about the parasite and its mammalian hosts, and summarize what is known about the snail intermediate host and its susceptibility to control by molluscicides, biological agents, and environmental management. Other sections describe a range of advances in diagnostic tools, from hospital-based radiological investigations to the use of portable ultrasound equipment at the village level, and issue advice on treatmet and retreatment schedules for chemotherapy with praziquantel, metrifonate, and oxamniquine. The final part uses profiles of control programmes in 23 countries to document the feasibility of control and illustrate the diversity of approaches that can be applied according to different national conditions, forms and prevalence of infection, health care systems, and available resources.




Helminth Control in School-Age Children


Book Description

More than 2000 million people worldwide are affected by schistosomiasis and soil-transmitted helminth (STH) infections and 155 000 deaths are reported each year. These infections are diseases associated with poverty, and in school-age populations in developing countries, intestinal helminth infections rank first among the causes of all communicable and noncommunicable diseases. This book describes a cost-effective approach to the control of these infections, based on the use of periodic parasitological surveys of school population samples. It is intended as a guide for health education managers responsible for implementing community-based programmes.




Preventive Chemotherapy in Human Helminthiasis


Book Description

This manual focuses on how and when a set of low-cost or free drugs should be used in developing countries to control a set of diseases caused by worm infections. Preventive chemotherapy in this context means using drugs that are effective against a broad range of worm infections to simultaneously treat the four most common diseases caused by worms: river blindness (onchocerciasis), elephantiasis (lymphatic filariasis), schistosomiasis, and soil-transmitted helminthiasis. Significant opportunities also exist to integrate these efforts with the prevention and control of diseases such as trachoma. The new approach provides a critical first step in combining treatment regimens for diseases which, although different in themselves, require common resources and delivery strategies for control or elimination.




Human Schistosomiasis


Book Description

Human schistosomes (blood flukes) are digenetic trematodes that spend the adult part of their life cycle in humans and a further part in aquatic snails. Despite advances in chemotherapy, schistosomiasis is still a significant infection in the populations of several countries in the tropics. This book replaces a previous volume Schistosomiasis: Epidemiology, Treatment and Control (Heinemann, 1982) by Jordan and Webbe. All chapters have been rewritten by internationally renowned workers. Ultrasound, expected to aid identification of early disease in the field and increase our understanding of its evolution, is discussed in a new chapter. Others, each with an extensive bibliography, review the parasites and their snail intermediate hosts, epidemiology, clinical manifestations and pathology, diagnosis, immunology, drugs and patient management and control. Limitations of the role of chemotherapy in morbidity control are discussed and the need for flexibility in control interventions in the varied epidemiological situations is stressed. An interdisciplinary approach may be necessary to reduce transmission by appropriate measures against the snail intermediate host, and to implement public health measures, including the provision of safe water (with many other medical and social benefits) and health education. This comprehensive volume is for public health workers involved in the prevention and control of the disease, for physicians, and for students and teachers of many disciplines. It also provides a reference book for health planners, social anthropologists, health educators, water and sanitary engineers and others engaged in improving health in the tropics. Physicians in temperate countries will also find it a useful reference book as schistosomiasis, often acute, is being diagnosed more frequently in those returning from holidays in endemic areas.




Investing to Overcome the Global Impact of Neglected Tropical Diseases


Book Description

"The presence, or absence, of neglected tropical diseases (NTDs) can be seen as a proxy for poverty and for the success of interventions aimed at reducing poverty. Today, coverage of the public-health interventions recommended by the World Health Organization (WHO) against NTDs may be interpreted as a proxy for universal health coverage and shared prosperity - in short, a proxy for coverage against neglect. As the world's focus shifts from development to sustainable development, from poverty eradication to shared prosperity, and from disease-specific goals to universal health coverage, control of NTDs will assume an important role towards the target of achieving universal health coverage, including individual financial risk protection. Success in overcoming NTDs is a "litmus test" for universal health coverage against NTDs in endemic countries. The first WHO report on NTDs (2010) set the scene by presenting the evidence for how these interventions had produced results. The second report (2013) assessed the progress made in deploying them and detailed the obstacles to their implementation. This third report analyses for the first time the investments needed to achieve the scale up of implementation required to achieve the targets of the WHO Roadmap on NTDs and universal coverage against NTDs. INVESTING TO OVERCOME THE GLOBAL IMPACT OF NEGLECTED TROPICAL DISEASES presents an investment strategy for NTDs and analyses the specific investment case for prevention, control, elimination and eradication of 12 of the 17 NTDs. Such an analysis is justified following the adoption by the Sixty-sixth World Health Assembly in 2013 of resolution WHA6612 on neglected tropical diseases, which called for sufficient and predictable funding to achieve the Roadmap's targets and sustain control efforts. The report cautions, however, that it is wise investment and not investment alone that will yield success. The report registers progress and challenges and signals those that lie ahead. Climate change is expected to increase the spread of several vector-borne NTDs, notably dengue, transmission of which is directly influenced by temperature, rainfall, relative humidity and climate variability primarily through their effects on the vector. Investments in vector-borne diseases will avoid the potentially catastrophic expenditures associated with their control. The presence of NTDs will thereby signal an early warning system for climate-sensitive diseases. The ultimate goal is to deliver enhanced and equitable interventions to the most marginalized populations in the context of a changing public-health and investment landscape to ensure that all peoples affected by NTDs have an opportunity to lead healthier and wealthier lives."--Publisher's description.







Schistosomiasis


Book Description

Schistosomiasis is a disease affecting over 200 million people in developing countries. It is caused by worms that need particular species of fresh water snails for completing their life cycle, and developments in Third World countries have spread and increased the severity of the disease. Dr Jordan describes a 15 year study on St Lucia, a mountainous Caribbean Island where isolated valleys provided ideal field laboratories for comparing the effects on transmission, the advantages and disadvantages of intensive snail control, environmental improvement (providing villages with water), and chemotherapy with newly available drugs. The project was staffed by a multidisciplinary team and their intensive programme led to successful control. This book describes the investigation, fully and readably. It will be valuable to all who work in the fields of tropical medicine, parasitology, epidemiology, community and environmental health, and vital to workers on schistosomiasis control in developing countries.




Bench aids for the diagnosis of intestinal parasites


Book Description

This second edition of Bench aids for the diagnosis of intestinal parasites is intended both as a practical tool for the diagnosis of intestinal parasitic infections for laboratory and field workers and as a teaching aid for students and trainees. The plates are arranged on two sides: the recto with microphotographs for the identification of eggs larvae trophozoites cysts and oocysts occurring in faeces and the verso dedicated to the different copromicroscopical methods (procedures) and main staining techniques used in parasitology. Special attention has been devoted to all graphical and pictorial contents. The decision to include the outline of an Ascaris lumbricoides egg in its relative size next to each parasitic structure fulfils the intention of visualizing the actual dimensions that the eye needs to be looking for when examining the specimens with a microscope. For each image the size of the parasite and a short description are provided to assist in the microscopical identification. Two summary plates one for helminths and the other for protozoa are also included to provide a visual overview of the different presentations of parasitic elements. The bench aids have been produced in a weatherproof plastic-sealed format that is robust and easy to use at the bench. They are recommended for use by all health workers engaged in the routine diagnosis of intestinal parasitic infections.