J. Anim Sci.
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J. Anim Sci. 1951. 10:733-741.
© 1951 American Society of Animal Science
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The Isolation of Spherophorus Necrophorus from the Rumen Together with Some Feed Lot Data on Abscess and Telangiectasis1

T. J. Robinson2, D. E. Jasper3 and H. R. Guilbert2, 4,

University of California

Abstract

  1. Experiments and observations made on the problems of liver abscess and telangiectasis during 1950 are presented.
  2. No apparent relation exists between time in the feed lot and the incidence of liver abscesses.
  3. There appears to be an increase in telangiectasis shortly after cattle are placed on full feed in the feed lot. The incidence then appears to decrease after 50 days.
  4. Telangiectasis is capable of healing without fibrosis.
  5. The incidence of telangiectasis in California is very much higher than is indicated by condemnation records.
  6. "Sawdust" type lesion is extremely rare in California.
  7. The upper parietal region of the liver, in the area of attachment to the diaphragm, appears most susceptible to telangiectasis.
  8. There is no demonstrable relationship between telangiectasis, abscess, and fluke, nor is there any evidence that abscesses are more likely to develop in areas of telangiectasis than in other areas of the liver.
  9. The isolation of S. necrophorus from the bovine rumen is described. It is capable of surviving extremes of rumen environment.
  10. This study includes also description of unsuccessful attempts to induce liver damage and S. necrophorus infection experimentally by drastic feed changes and injection of the organism by stomach tube and intravenously.

Footnotes

1 This investigation was supported by a grant from Swift and Company, Chicago, Illinois.

2 Division of Animal Husbandry. The present address of the senior author is College of Agriculture, University of Melbourne, Victoria, Australia.

3 School of Veterinary Medicine.

4 Grateful acknowledgement is made to Swift & Co., South San Francisco; James Allen & Co., San Francisco; Livestock Buying Co., Oakland; Wilson & Co., Los Angeles; and the Anza Packing Co., El Centro, for access to their records and for aid in abstracting data.

Particular thanks are due to Harvey McDougal, W. C. Ranch Company, Collinsville, for putting the cattle from the feed lot at our disposal, and for slaughtering unprofitable animals for experimental purposes. We also are extremely grateful to James Allen, San Francisco, for making slaughtering facilities available and for rendering every assistance in these investigations.




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J. T. Vasconcelos and M. L. Galyean
ASAS Centennial Paper: Contributions in the Journal of Animal Science to understanding cattle metabolic and digestive disorders
J Anim Sci, July 1, 2008; 86(7): 1711 - 1721.
[Abstract] [Full Text] [PDF]


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