EN
Studies have shown that the bacteria strains Eschericha coli and Streptococcus faecalis survive 2 to 8 days longer at 4°C than at 20°C in the same lake water samples. An addition of glucose to lake water increased survival of these bacteria strains by 2 to 4 days. An addition of peptone was even more effective. Survival of E. coli increased by 5-15 days, and of Str. faecalis by 11-19 days. It was also found that E. coli showed longer survival than Str. faecalis in water samples with no organic additives and those containing glucose. In the case of water samples with peptone, survival of the two strains did not differ.