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United States Department of Agriculture

Agricultural Research Service

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Image Number K7905-7

To estimate the number of brown stomach worms in a pasture, researchers place a worm-free calf on grass for a measured length of time, then check for parasite eggs in its feces.

Photo by Keith Weller.

640 pixels wide: (k7905-7.jpg)

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Last Modified: 8/13/2016
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