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The seasonality of bacterial quality of water in a tropical developing country (Sierra Leone)

Published online by Cambridge University Press:  19 October 2009

R. C. Wright
R. C. Wright
Affiliation:
Rural Water Supply Programme SIL/79/009, UNDP, P.O. Box 1011, Freetown, Sierra Leone
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Summary

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Natural water sources used as drinking-water supplies by rural settlements in Sierra Leone were examined monthly over a one-year period to detect any seasonal variations in bacterial quality. The 37 °C colony count, levels of selected faecal indicator bacteria and the incidence of Salmonella spp. were monitored. A seasonality was demonstrated for all the variables, counts generally increasing with the progression of the dry season, culminating in peaks at the transition from dry to wet season. Some complications with respect to the interpretation of counts of faecal indicator bacteria from raw tropical waters are noted.

Type
Research Article
Information
Journal of Hygiene , Volume 96 , Issue 1 , February 1986 , pp. 75 - 82
Copyright
Copyright © Cambridge University Press 1986

References

REFERENCES

Apha, (1981). Standard Methods for the Examination of Water and Wastewater. American Public Health Association, American Water Works Association and Water Pollution Control Federation: Washington.Google Scholar
Bagde, U. S. & Varma, A. K. (1982). Distribution and periodicity of total, faecal coliform bacteria in an aquatic ecosystem. International Journal of Environmental Studies 19, 215–220.CrossRefGoogle Scholar
Barrell, R. A. E. & Rowland, M. G. M. (1979). The relationship between rainfall and well water pollution in a West African (Gambian) village. Journal of Hygiene 83, 143–150.CrossRefGoogle Scholar
Chambers, R.Longhurst, R., Bradley, D. J. & Feachem, R. (1979). Seasonal dimensions to rural poverty: analysis and practical implications, Discussion Paper no. DP 142. Institute of Development Studies. Brighton: University of Sussex.Google ScholarPubMed
Dhss, (1969). The bacteriological examination of water supplies, Report no. 71 of the Department of Health and Social Security and Department of the Environment, 4th ed.London: HMSO.Google Scholar
Dhss, (1982). The bacteriological examination of water supplies, Report No. 71 of the Department of Health and Social Security and Department of the Environment, 5th ed.London: HMSO.Google Scholar
Drasar, B.STomkins, A.M. & Feachem, R. G. (1981). Diarrhoeal diseases. In Seasonal Dimensions to Rural Poverty (ed. Chambers, R., Longhuret, R. and Pacey, A.), pp. 102–111. London: Francis Pinter.Google Scholar
Feachem, R. G. (1974). Faecal coliforms and faecal streptococci in streams in the New Guinea highlands. Water Research 8, 367–374.CrossRefGoogle Scholar
Feachem, R. G. (1975). An improved role for the faecal coliform to faecal streptococci ratios in the differentiation between human and non-human pollution sources. Water Research 9, 689–690.CrossRefGoogle Scholar
Feachem, R. G., McGarry, M. G. & Mara, D. D. (1977). Water Wastes and Health in Hot Climates. Chichester: Wiley.Google Scholar
Geldreich, E. E. & Kenner, B. A. (1969). Concepts of faecal streptococci in stream pollution. Journal of Water Pollution Control Federation 41, R336–R352.Google ScholarPubMed
Muhammed, S. I. & Morrison, S. M. (1975). Water quality in Kiambu District, Kenya. East African Medical Journal 52, 269–276.Google ScholarPubMed
Odell, R. T., Dijkerman, J. C, van Wuure, W., Melsted, S. W., Beavers, A. H., Sutton, P. M., Kurtz, L. T. & Miedema, R. (1974). Characteristics, classification and adaptation of soils in selected areas in Sierra Leone, West Africa, Bulletin no. 748 of the University of Illinois Agricultural Experimental Station. Urbana: University of Illinois.Google Scholar
Ojo, O. (1977). The Climates of West Africa. London: Heinemann.Google Scholar
Who, (1973). Community water supply and sewage disposal in developing countries. World Health Statistics Report 26, 720–783.Google Scholar
Who, (1983). Guidelines for Drinking Water Quality. Geneva: World Health Organisation.Google Scholar
Wright, R. C. (1982). A comparison of the levels of faecal indicator bacteria in water and human faeces in a rural area of a tropical developing country (Sierra Leone). Journal of Hygiene 89, 69–78.CrossRefGoogle Scholar