Editorial Type:
Microbiology

Respiratory tract disease and mucosal colonization by Pasteurella haemolytica in transported cattle

Glynn H. Frank From the USDA-ARS, National Animal Disease Center, PO Box 70, Ames, LA 50010 (Frank, Briggs, Zehr); Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas Veterinary Medical Center, Texas A&M University, College Station, TX 77843 (Loan); and USDA-ARS, Conservation and Production Research Laboratory, Bushland, TX 79012 (Purdy).

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 DVM, PhD
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Robert E. Briggs From the USDA-ARS, National Animal Disease Center, PO Box 70, Ames, LA 50010 (Frank, Briggs, Zehr); Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas Veterinary Medical Center, Texas A&M University, College Station, TX 77843 (Loan); and USDA-ARS, Conservation and Production Research Laboratory, Bushland, TX 79012 (Purdy).

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Raymond W. Loan From the USDA-ARS, National Animal Disease Center, PO Box 70, Ames, LA 50010 (Frank, Briggs, Zehr); Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas Veterinary Medical Center, Texas A&M University, College Station, TX 77843 (Loan); and USDA-ARS, Conservation and Production Research Laboratory, Bushland, TX 79012 (Purdy).

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Charles W. Purdy From the USDA-ARS, National Animal Disease Center, PO Box 70, Ames, LA 50010 (Frank, Briggs, Zehr); Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas Veterinary Medical Center, Texas A&M University, College Station, TX 77843 (Loan); and USDA-ARS, Conservation and Production Research Laboratory, Bushland, TX 79012 (Purdy).

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Emilie S. Zehr From the USDA-ARS, National Animal Disease Center, PO Box 70, Ames, LA 50010 (Frank, Briggs, Zehr); Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas Veterinary Medical Center, Texas A&M University, College Station, TX 77843 (Loan); and USDA-ARS, Conservation and Production Research Laboratory, Bushland, TX 79012 (Purdy).

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DOI:
https://doi.org/10.2460/ajvr.1996.57.09.1317
Volume/Issue:
Volume 57: Issue 9
Received:
20 Nov 1995
|
Accepted:
24 Apr 1996
|
Online Publication Date:
01 Sep 1996
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Abstract

Objectives

To follow incidence of Pasteurella haemolytica (PH) in the upper respiratory tract of healthy calves at the farm and through the marketing process, and to determine the effect of vaccination on PH colonization of the upper respiratory tract and on the incidence of respiratory tract disease (RTD).

Animals

2- to 5-month-old calves (n = 104) from 4 farms.

Procedure

Calves were vaccinated with a killed PH serotype-1 product. Nasal secretion and tonsil wash specimens were cultured for PH, and serum antibody was measured by indirect hemagglutination. Calves with RTD were treated with tilmicosin phosphate.

Results

At the feedyard, 73 calves had RTD. The incidence of RTD was significantly related to the farm of origin, and was inversely related to the PH serum titer at the farm, but was not influenced by vaccination. Isolations of PH serotype 1 however, were reduced by vaccination. The major serotypes of PH encountered were 1 and 6.

Conclusion

Vaccination can reduce the frequency of colonization of the uoper respiratory tract by PH. (Am J Vet Res 1936;57:1317-1320)

Abstract

Objectives

To follow incidence of Pasteurella haemolytica (PH) in the upper respiratory tract of healthy calves at the farm and through the marketing process, and to determine the effect of vaccination on PH colonization of the upper respiratory tract and on the incidence of respiratory tract disease (RTD).

Animals

2- to 5-month-old calves (n = 104) from 4 farms.

Procedure

Calves were vaccinated with a killed PH serotype-1 product. Nasal secretion and tonsil wash specimens were cultured for PH, and serum antibody was measured by indirect hemagglutination. Calves with RTD were treated with tilmicosin phosphate.

Results

At the feedyard, 73 calves had RTD. The incidence of RTD was significantly related to the farm of origin, and was inversely related to the PH serum titer at the farm, but was not influenced by vaccination. Isolations of PH serotype 1 however, were reduced by vaccination. The major serotypes of PH encountered were 1 and 6.

Conclusion

Vaccination can reduce the frequency of colonization of the uoper respiratory tract by PH. (Am J Vet Res 1936;57:1317-1320)

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Cover American Journal of Veterinary Research
American Journal of Veterinary Research
Publication Date:
01 Sep 1996
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