Abomasal erosions in feedlot cattle

Rue Jensen From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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Terry R. Spraker From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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Robert D. Glock From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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Robert L. Jones From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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J. K. Collins From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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Duane E. Flack From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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Robert Kerschen From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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R. L. Hoff From the College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523 (Jensen, Spraker, Glock, Jones, Collins), Department of Veterinary Sciences, University of Wyoming, Laramie, WY 82070 (Jensen), Monfort of Colorado, Greeley, CO 80632 (Flack, Kerschen), and the USDA, Food Safety and Inspection Service, Washington, DC 20250 (Hoff).

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Summary

The abomasa of 1,949 slaughtered feedlot cattle, 45 necropsied feedlot cattle that died 2 to 45 days after arrival, and 45 necropsied pastured cattle were opened and examined. Of these organs, 484,1, and none, respectively, contained erosions. The slaughtered cattle were fattened at 3 locations: 1,305 with 430 eroded abomasa were fed a ration of corn in northeastern Colorado; 144 cattle with 4 affected abomasa fed a ration of milo in south-central Arizona; and 500 cattle with 50 affected abomasa fed a ration of milo and corn in northwestern Texas. The red-brown lesions developed late during the second semester of fattening and were located mostly on fundic folds. Those on fold edges were linear and were 2 to 15 cm long, whereas those on fold sides were punctate and were 2 to 15 mm in diameter. Normal fold edges contained fewer goblet cells and less surface mucus than did fold sides. Eroded folds had disruption of surface epithelium, damage to endothelial cells, and dilated, thrombosed, congested, and ruptured capillaries. Mean pH values of 16 normal and 17 eroded abomasa were 4.7 and 3.9, respectively. Necrosis of all tissue toward the mucosal surface of erosions was extensive. The cause of gastric erosion in cattle is not known.

Summary

The abomasa of 1,949 slaughtered feedlot cattle, 45 necropsied feedlot cattle that died 2 to 45 days after arrival, and 45 necropsied pastured cattle were opened and examined. Of these organs, 484,1, and none, respectively, contained erosions. The slaughtered cattle were fattened at 3 locations: 1,305 with 430 eroded abomasa were fed a ration of corn in northeastern Colorado; 144 cattle with 4 affected abomasa fed a ration of milo in south-central Arizona; and 500 cattle with 50 affected abomasa fed a ration of milo and corn in northwestern Texas. The red-brown lesions developed late during the second semester of fattening and were located mostly on fundic folds. Those on fold edges were linear and were 2 to 15 cm long, whereas those on fold sides were punctate and were 2 to 15 mm in diameter. Normal fold edges contained fewer goblet cells and less surface mucus than did fold sides. Eroded folds had disruption of surface epithelium, damage to endothelial cells, and dilated, thrombosed, congested, and ruptured capillaries. Mean pH values of 16 normal and 17 eroded abomasa were 4.7 and 3.9, respectively. Necrosis of all tissue toward the mucosal surface of erosions was extensive. The cause of gastric erosion in cattle is not known.

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