A study was carried out to ´obtain information on the effect of sediments on the survival of Escherichia coli in seawaters during the period from 29 to July 20, 1977.
All water and sediment samples were collected from the estuary (Koyang), Incheon Bay, and Dukjug Island in Kyungki Province. .
Coliform and fecal coliform determinations on field samples were done by MPN method and E. CO E survival test was performed at 48hr intervals for 15 day by the standard plate count method on eosine methylene blue agar plates.
The results obtained are summarized as follows;
1. On a volume basis larger numbers of coliform and fecal coliform organisms were found in the sediments than- -in the sea waters.
´2. When E. coif was added to nonautochaved seawaters, with and without nonautoclaved sediments, it was observed that. E. coli survived longer in the presence of sediments.
3. E. coli was found to increase rapidly in number and to survive long when it was added to autoclaved seawaters and sediments, but it was observed that E. coli decreased rapidly in., number and to survive short period - when it was added to no autoclaved seawaters and sediments. ?
4. When E. coli was added to autoclaved seawaters, with and without autoclaved sediments, it was found that E. coli surived longer and increased more rapidly in number in the presence of sediments.
5. When E..coli was added to nonautochaved seawaters, with no autoclaved and autoclaved sediments, it was found that E. coli survived longer and increased rapidly in autoclaved sediments than in no autoclaved sediments.
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