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A USGS scientist prepares to analyze bacterial DNA

By Environmental Health Program 2018 (approx.)
A USGS scientist prepares to analyze bacterial DNA extracted from water samples
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Detailed Description

USGS scientists use a variety of microbiological and chemical methods to evaluate the microbiological quality of water. In this photo, a USGS scientist prepares to analyze bacterial DNA extracted from water samples.

Sources/Usage

Public Domain.