Factors affecting the survival of E. coli in a river |
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Authors: | I. Barcina I. Arana J. Iriberri L. Egea |
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Affiliation: | (1) Departamento de Microbiología, Facultad de Ciencias, Universidad del Pais Vasco, Apdo. 644 (E-48080), Bilbao, Spain |
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Abstract: | The relationships between physical, chemical and microbial characteristics of an aquatic ecosystem and the survival of E. coli have been studied. Two conditions of the ecosystem (warm and cold) are considered. T90 (time necessary for 90% of a bacterial population to die) in the warm situation shows an inverse exponential relationship with water temperature. Besides the direct relationship temperature-T90, there is an indirect effect of temperature upon T90 through the natural microflora of the water. The relationships between temperature and the heterotrophic population, and between the heterotrophic population and the bacterial consumers (P.F.U.), are exponential and linear, respectively. |
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Keywords: | E. coli survival freshwater ecosystem |
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