A simple filtation method to remove plankton-associated Vibrio cholerae in raw water supplies in developing countries.
Plankton to which cells of Vibrio cholerae O1 and/or O139 were attached was introduced into 0.5 Instant Ocean microcosms maintained at 25°C. The bulk of the plankton and associated particulates was removed with a filter constructed from either nylon net and one of several different types of sari material, the latter being very inexpensive and readily available in villages in Bangladesh, where V. cholerae is endemic.
V. cholerae was enumerated before and after filtration to evaluate the efficiency of the filtration procedure.
The results obtained indicate that 99% of V. cholerae, i.e., those cells attached to plankton, were removed from the water samples.
Epidemic strains of V. cholerae O1 and O139 from various geographical sources, including Bangladesh, Brazil, India, and Mexico, were included in the experiments.
Removal of vibrios from water by this simple filtration method was found to yield consistent results with all strains examined in this study.
Thus, it is concluded that a simple filtration procedure involving the use of domestic sari material can reduce the number of cholera vibrios attached to plankton in raw water from ponds and rivers commonly used for drinking.
Since untreated water from such sources serves as drinking water for millions of people living in developing countries (e.g. (...)
Mots-clés Pascal : Plancton, Vibrio cholerae, Vibrionaceae, Bactérie, Filtration, Décontamination, Eau potable, Pays en développement, Méthode, Bengla Desh, Asie
Mots-clés Pascal anglais : Plankton, Vibrio cholerae, Vibrionaceae, Bacteria, Filtration, Decontamination, Drinking water, Developing countries, Method, Bangladesh, Asia
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0404834
Code Inist : 002A05B14. Création : 10/04/1997.