Condemnation of beef because of Sarcocystis hirsuta infection

J. P. Dubey From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Bldg 1040, Rm 100A, BARC-East, USDA-ARS, Beltsville, MD 20705 (Dubey, Lindsay), and the Science Western Laboratory, Food Safety and Inspection Service, USDA, PO Box 4008, Alameda, CA 94501 (Udtujan, Cannon).

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R. M. Udtujan From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Bldg 1040, Rm 100A, BARC-East, USDA-ARS, Beltsville, MD 20705 (Dubey, Lindsay), and the Science Western Laboratory, Food Safety and Inspection Service, USDA, PO Box 4008, Alameda, CA 94501 (Udtujan, Cannon).

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L. Cannon From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Bldg 1040, Rm 100A, BARC-East, USDA-ARS, Beltsville, MD 20705 (Dubey, Lindsay), and the Science Western Laboratory, Food Safety and Inspection Service, USDA, PO Box 4008, Alameda, CA 94501 (Udtujan, Cannon).

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D. S. Lindsay From the Zoonotic Diseases Laboratory, Livestock and Poultry Sciences Institute, Bldg 1040, Rm 100A, BARC-East, USDA-ARS, Beltsville, MD 20705 (Dubey, Lindsay), and the Science Western Laboratory, Food Safety and Inspection Service, USDA, PO Box 4008, Alameda, CA 94501 (Udtujan, Cannon).

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Summary

Carcasses from 18 Holstein cows from Nevada, California, and Oregon were condemned because of grossly visible sarcocysts of Sarcocystis hirsuta. Sarcocysts were white to dull white, 2 to 7 mm long, and approximately 1 mm wide. Sarcocysts were most numerous in muscles of diaphragm, flank, and limbs and were able to infect laboratory-raised cats.

Summary

Carcasses from 18 Holstein cows from Nevada, California, and Oregon were condemned because of grossly visible sarcocysts of Sarcocystis hirsuta. Sarcocysts were white to dull white, 2 to 7 mm long, and approximately 1 mm wide. Sarcocysts were most numerous in muscles of diaphragm, flank, and limbs and were able to infect laboratory-raised cats.

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