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PubMed2002

Estimating the burden of disease from water, sanitation, and hygiene at a global level.

We estimated the disease burden from water, sanitation, and hygiene at the global level taking into account various disease outcomes, principally diarrheal diseases. The disability-adjusted life year (DALY) combines the burden from death and disability in a single index and permits the comparison of the burden from water, sanitation, and hygiene with the burden from other risk factors or diseases. We divided the world's population into typical exposure scenarios for 14 geographical regions. We then matched these scenarios with relative risk information obtained mainly from intervention studies. We estimated the disease burden from water, sanitation, and hygiene to be 4.0% of all deaths and 5.7% of the total disease burden (in DALYs) occurring worldwide, taking into account diarrheal diseases, schistosomiasis, trachoma, ascariasis, trichuriasis, and hookworm disease. Because we based these estimates mainly on intervention studies, this burden is largely preventable. Other water- and sanitation-related diseases remain to be evaluated. This preliminary estimation of the global disease burden caused by water, sanitation, and hygiene provides a basic model that could be further refined for national or regional assessments. This significant and avoidable burden suggests that it should be a priority for public health policy.

Adolescent↗
PubMed2003

Myanmar experiences in sanitation and hygiene promotion: lessons learned and future directions.

Recent activities in connection with the National Sanitation Week (NSW) and Social Mobilisation for Sanitation and Hygiene have contributed to a significant increase in access to sanitary means of excreta disposal, from 45% in 1997 to 67% in 2001. Handwashing with soap and water after defecation has also increased from 18% in 1996 to 43% in 2001. Success is attributable to high level political commitment, state or division level action and community mobilisation by village level authorities. Multi-level efforts such as mass media, planning workshops, training sessions and house-to-house visits by village authorities and health officials have raised greater awareness of sanitation and hygiene issues and led to construction of latrines on a self-help basis. The challenge ahead is to give greater attention to the 'hard to reach' who live in less accessible areas and are more resistant to change. The 2002 NSW has accordingly given special emphasis to activities in 73 of 324 townships where 50% or more of the households have no access to a sanitary latrine. The communication and social mobilisation package has been improved to upgrading unsanitary latrines and integrating handwashing more systematically with promotion of sanitary latrines. Programmatic follow-up to the NSW is being provided in selected townships through more intensive social mobilisation for 'hard to reach' households and activity-based school sanitation and hygiene education. This approach will contribute further towards improved hygienic practices and reduce diarrhoeal morbidity and mortality.

Communicable Disease Control↗
PubMed2002

The risk of Ascaris lumbricoides infection in children as an environmental health indicator to guide preventive activities in Caparaó and Alto Caparaó, Brazil.

OBJECTIVE: To develop an environmental health indicator for use as a basis for developing preventive measures against Ascaris lumbricoides infection in children from the rural municipalities of Caparaó and Alto Caparaó, in Minas Gerais, Brazil. METHODS: A cross-sectional survey was conducted between May and September 1998 among 1171 children under 14 years of age living in 588 dwellings selected from 11 communities. Trained interviewers used a questionnaire to identify risk factors for infection (socioeconomic, sanitation and hygiene variables) and collected stool samples from each child for parasitological tests. RESULTS: The overall prevalence of A. lumbricoides infection was 12.2%. The results showed the protective effects of availability of water in the washbasin and better hygiene, sanitation and socioeconomic status; the interactive effect of crowding was five times larger in households without water in the washbasin than in those having water. There was a statistically significant association between infection and children's age. CONCLUSION: The environmental health indicator, which incorporated the most significant biological, environmental and social factors associated with the risk of A. lumbricoides infection in children from these communities, should contribute to the development of surveillance tools and health protection measures in this population.

Age Factors↗
PubMed2000

Management of rural drinking water supplies and waste using the participatory hygiene and sanitation transformation (PHAST) initiative in Zimbabwe.

This paper focuses on the use of Participatory Hygiene and Sanitation Transformation (PHAST) and how the methodology can be taken to scale. It uses the Zimbabwe experience and highlights some of the benefits in the application of PHAST, conditions necessary for scaling up and possible constraints. The PHAST initiative started off as a pilot process seeking to promote improved hygiene behaviour and promotion of sanitation. Having successfully piloted PHAST, Zimbabwe has scaled up the use of the methodology at a country level. While impact studies have not yet been conducted, reviews of the effects of the process have indicated positive behaviour change in such areas as management of water, construction and use of latrines. The process has also led to a change of institutional approaches in planning for improved water and sanitation from supply driven projects to demand responsive approaches. Some lessons learnt have included the need for baseline surveys at the start of the use of PHAST, the difficulty in developing monitoring indicators and hence difficulty in measuring impacts. Conclusions being drawn using assessment studies are that the use of participatory approaches has led to improved hygiene behaviour with communities being able to link causes and effects. The use of participatory methods also necessitates a change in institutional approaches from supply driven approaches to demand responsiveness. Other lessons drawn were related to the creation of an enabling environment for the application of participatory processes. Such enabling environment includes capacity building, resource allocation, policy and institutional support.

Community Participation↗
PubMed2005

Water, sanitation and hygiene in developing countries: interventions and diarrhoea--a review.

We conducted a search to identify all English language papers (published between 1 January 1985 and 26 June 2003) with evidence on the effectiveness of water, sanitation and hygiene interventions in developing countries, in which diarrhoea morbidity in non-outbreak conditions was reported. A total of 39 studies were identified as relevant after an initial review of over 2000 titles. Data were extracted and, where possible, combined using meta-analysis to provide a summary estimate of the effectiveness of specific interventions, including water supply and water treatment. Most of the interventions (including multiple interventions, hygiene and water quality) were found to significantly reduce the levels of diarrhoeal illness, with the greatest impact being seen for hygiene and household treatment interventions (after removal of studies classed as poor quality). Sanitation interventions could not be assessed as only a single study suitable for meta-analysis was identified.

Developing Countries↗
PubMed1996

Sustainability of a water, sanitation and hygiene education project in rural Bangladesh: a 5-year follow-up.

An integrated water supply, sanitation and hygiene (WSH) education intervention project was run by the International Centre for Diarrhoeal Disease Research, Bangladesh, over the period 1983-87. In the intervention area the project provided handpumps, pit latrines, and hygiene education to about 800 households. The control population did not receive any interventions, but had access to the usual government and private WSH facilities. After 1987 no external support was provided to maintain these provisions. A cross-sectional follow-up survey, which was carried out in 1992, involved about 500 randomly selected households from the intervention and control areas. In 1992 about 82% of the pumps were still in good functional condition and of these, 94% had been functioning well in 1987. Fewer latrines were functional in 1992 (64%) than at the end of 1987 (93%). In the former intervention area about 84% of the adults were using sanitary latrines in 1992 compared with only 7% in the control area. Knowledge related to disease transmission, however, was poor and similar in both areas. People claimed that they used the WSH facilities to improve the quality of their lives. The prevalence of diarrhoeal diseases in the 1992 survey among the control population was about twice that among those in the intervention area.

Adolescent↗