Page Banner

United States Department of Agriculture

Agricultural Research Service

Image Number D1294-1

Download a high-resolution (300dpi) digital image here

Image Number D1294-1

Technicians Allan Knopf and Sharette Evans collect water samples from a pond that supplies irrigation water to Pacana Park in Maricopa, Arizona. In the laboratory, the pond-water samples are filtered to isolate microbes. DNA extracted from the filters is then screened for the presence of human-specific Bacteroides molecular markers.

 

Photo by Stephen Ausmus.


640 pixels wide: (d1294-1.jpg)




Please visit our Image Gallery
Last Modified: 12/15/2009
Footer Content Back to Top of Page