Correlations of Aeromonas hydrophila with Indicator Bacteria of Water Quality and Environmental Factors in a Mountain Stream
The occurrence of Aeromonas hydrophila in a mountain stream was studied quarterly for more than 3 years. A. hydrophila and fecal coliforms were measured by the membrane filter method, and heterotrophic plate counts (HPC) were measured by the pour plate method at 20 and 35 °C. A. hydrophila was detected from all samples collected and correlated with HPC, especially at 35 °C, but not with fecal coliforms. A. hydrophila densities along the main stream in a log scale correlated positively with the catchment areas in a log scale. The intercepts of the regression lines correlated positively with the mean water temperatures along the channel, which is considered to reflect the growth of the bacterium on the stream bed. The slopes correlated negatively with total precipitation in a 60-day period before each sampling. These results suggested that the factors controlling A. hydrophila in a mountain stream were water temperature and precipitation, and that the bacterium was indigenous to stream environment rather than from contamination because of human activity.
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Document Type: Research Article
Publication date: 1999-03-01
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Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year. Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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