Pesticides and immunosuppression: the risks to public health.
(17/5122)
There is substantial experimental, epidemiological and other evidence that many pesticides in widespread use around the world are immunosuppressive. This poses a potentially serious health risk in populations highly exposed to infectious and parasitic diseases, subject to malnutrition, and inadequately serve by curative health programmes. An expanded programme of research is needed to investigate this potential risk and to design precautionary measures. (+info)
A reassessment of the cost-effectiveness of water and sanitation interventions in programmes for controlling childhood diarrhoea.
(18/5122)
Cost-effectiveness analysis indicates that some water supply and sanitation (WSS) interventions are highly cost-effective for the control of diarrhoea among under-5-year-olds, on a par with oral rehydration therapy. These are relatively inexpensive "software-related" interventions such as hygiene education, social marketing of good hygiene practices, regulation of drinking-water, and monitoring of water quality. Such interventions are needed to ensure that the potentially positive health impacts of WSS infrastructure are fully realized in practice. The perception that WSS programmes are not a cost-effective use of health sector resources has arisen from three factors: an assumption that all WSS interventions involve construction of physical infrastructure, a misperception of the health sector's role in WSS programmes, and a misunderstanding of the scope of cost-effectiveness analysis. WSS infrastructure ("hardware") is generally built and operated by public works agencies and financed by construction grants, operational subsidies, user fees and property taxes. Health sector agencies should provide "software" such as project design, hygiene education, and water quality regulation. Cost-effectiveness analysis should measure the incremental health impacts attributable to health sector investments, using the actual call on health sector resources as the measure of cost. The cost-effectiveness of a set of hardware and software combinations is estimated, using US$ per case averted, US$ per death averted, and US$ per disability-adjusted life year (DALY) saved. (+info)
Update on diagnosis, management, and prevention of hepatitis B virus infection.
(19/5122)
Acute and chronic hepatitis B virus (HBV) infection is a leading cause of liver disease worldwide. It is estimated that approximately 350 million people worldwide have chronic HBV infection and that 1 million persons die each year from HBV-related chronic liver disease. In the past decade, significant progress in the understanding of the molecular virology and pathogenesis of HBV infection has been made. In addition, effective treatment modalities have been developed for persons with chronic infection. Worldwide, prevention of HBV transmission has become a high priority. In 1992, the Global Advisory Group to the World Health Organization recommended that all countries integrate hepatitis B vaccine into national immunization programs by 1997. Currently, 80 countries have done so and several others are planning to. Many countries have reported dramatic reductions in the prevalence of chronic HBV infection among children born since the hepatitis B vaccine was introduced into infant immunization schedules. Recent reports from Taiwan indicate a reduction in the incidence of liver cancer among children as a result of widespread hepatitis B vaccination programs. (+info)
Innovation and public accountability in clinical research.
(20/5122)
For more than 20 years, clinical researchers have expressed alarm about the decline of their field, but they have failed to achieve a consensus on policies to revitalize and sustain it. Although they have traced the plight of clinical research to profound changes in science, medicine, and public expectations, their conservative vision and preference for short-term measures inhibit effective policy formulation. These trends are the outcome of historical developments, and they seem to mandate a new approach to public policy. A potential source for more viable and socially accountable policies lies in practitioners' notion that clinical research bridges basic and applied science (by translating scientific innovations into practical measures). Exploiting that idea, however, would require a major reorientation of the field toward health services research and the institutions that are struggling to support it. (+info)
Racial bias in federal nutrition policy, Part I: The public health implications of variations in lactase persistence.
(21/5122)
The Dietary Guidelines for Americans from the basis for all federal nutrition programs and incorporate the Food Guide Pyramid, a tool to educate consumers on putting the Guidelines into practice. The Pyramid recommends two to three daily servings of dairy products. However, research has shown that lactase nonpersistence, the loss of enzymes that digest the milk sugar lactose, occurs in a majority of African-, Asian-, Hispanic-, and Native-American individuals. Whites are less likely to develop lactase nonpersistence and less likely to have symptoms when it does occur. Calcium is available in other foods that do not contain lactose. Osteoporosis is less common among African Americans and Mexican Americans than among whites, and there is little evidence that dairy products have an effect on osteoporosis among racial minorities. Evidence suggests that a modification of federal nutrition policies, making dairy-product use optional in light of other calcium sources, may be a helpful public health measure. (+info)
Rapid economic growth and 'the four Ds' of disruption, deprivation, disease and death: public health lessons from nineteenth-century Britain for twenty-first-century China?
(22/5122)
Rapid economic growth has always entailed serious disruption: environmental, ideological, and political. As a result the relationship between economic growth and public health is complex since such disruption always threatens to spill over into deprivation, disease and death. The populations of most current high-income, high-life expectancy countries of 'the West' endured several decades of severely compromised health when they first experienced industrialization in the last century Although health technologies have moved on, the social, administrative and political disruption accompanying economic growth can still impede the delivery of health improvements. The case history of 19th-century laissez-faire Britain is explored in some detail to demonstrate the importance of these social and political forces, particularly the relative vigour and participatory nature of local government, linking to recent work on the importance of social capital in development. For a country like China today, paradoxically, there is nothing that needs such careful planning as a 'free market' economy. (+info)
The challenge for Cuba.
(23/5122)
The restrictions of a U.S. trade embargo and the collapse of the Soviet Union marked the beginning of a period of extreme economic hardship in Cuba. Economic adversity has had tremendous effects, both positive and negative, on all aspects of life on the Island, including environmental and public health. (+info)
Tracing the evolution of critical evaluation skills in students' use of the Internet.
(24/5122)
This paper documents the evolving uses of the Internet made by public health graduate students and traces the development of their search methods and critical evaluative criteria. Early in the first semester and again six months later, twenty-four graduate students in a problem-based learning curriculum, which emphasizes evidence-based critical thinking skills, were required to describe their most helpful resources and to evaluate these resources critically. The answers were coded for the types of resources the students used, how frequently they were used, and why they were used. Student perception of the usefulness of resources, especially the Internet, and ability to evaluate these resources critically changed greatly. Initially, 96% of the students stated that the Internet was their most helpful resource. Six months later, these students continued to use the Internet; however, it was not their most useful source. At the later point, students had very specific uses for the Internet. Their most frequently used evaluation criterion was the reliability and objectivity of the source of the information. By the end of the first year of study, the majority of the students demonstrated an understanding of the principles of evidence-based practice and applied them to their research and analysis of information resources. (+info)