PREVALENCE OF PASTEURELLA-HAEMOLYTICA IN TRANSPORTED CALVES

  • 1 January 1983
    • journal article
    • research article
    • Vol. 44  (6) , 981-985
Abstract
In 2 years, calves from individual farms were samples by nasal swab for P. haemolytica at the farm, at an auction barn and at a feedyard after they had been transported 1600 km. Serum antibody titers were determined and P. haemolytica isolates were serotyped. The frequencies of P. haemolytica isolations were low at the farm, greater at the auction barn and markedly high at the feedyard. Serotype 2 was the predominant isolate at the farm; serotype 1 was the predominant isolate at the feedyard and from the pneumonic lungs of the calves that died of acute respiratory tract disease. There was a significant farm-to-farm variation in the percentages of calves that developed respiratory tract disease.