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, 340 (6233), 467-8

High Abundance of Viruses Found in Aquatic Environments

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High Abundance of Viruses Found in Aquatic Environments

O Bergh et al. Nature.

Abstract

The concentration of bacteriophages in natural unpolluted waters is in general believed to be low, and they have therefore been considered ecologically unimportant. Using a new method for quantitative enumeration, we have found up to 2.5 x 10(8) virus particles per millilitre in natural waters. These concentrations indicate that virus infection may be an important factor in the ecological control of planktonic micro-organisms, and that viruses might mediate genetic exchange among bacteria in natural aquatic environments.

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