FACTORS ASSOCIATED WITH MORBIDITY AND MORTALITY IN FEEDLOT CALVES - THE BRUCE-COUNTY BEEF PROJECT, YEAR 2
- 1 January 1981
- journal article
- research article
- Vol. 45 (2) , 103-112
Abstract
The results of the 2nd yr of the project confirmed most of the major findings from the initial year. Cornsilage feeding as the major roughage in the 1st mo. after arrival was associated with excess mortality. Mixing of cattle from different sources and vaccinating against respiratory disease appeared to be the most important additional factors that increased mortality rates. Delaying vaccination at least 2 days postarrival may have prevented the negative effects of vaccination but only in calves fed cornsilage. Morbidity rates were highly variable among farms but were positively correlated with mortality rates and treatment costs. The occurrence of infectious thromboembolic meningoencephalitis appeared to share some of the same risk factors as mortality; urolithiasis did not. Water deprivation may be a risk factor in the occurrence of urolithiasis. Fibrinous pneumonia was again the most frequent cause of death. Relative to year 1, infectious thromboembolic meningoencephalitis increased in frequency and only 1 death was attributed to bovine virus diarrhea.This publication has 5 references indexed in Scilit:
- INTERACTION BETWEEN PASTEURELLA-HAEMOLYTICA AND BOVINE ALVEOLAR MACROPHAGES - CYTO-TOXIC EFFECT ON MACROPHAGES AND IMPAIRED PHAGOCYTOSIS1980
- FACTORS ASSOCIATED WITH MORTALITY IN FEEDLOT CATTLE - BRUCE COUNTY BEEF-CATTLE PROJECT1980
- Effects of Method and Time of Castration of Feeder CalvesJournal of Animal Science, 1979
- Evaluation of inactivated infectious bovine rhinotracheitis vaccines.1975
- A field trial to evaluate an intranasal infectious bovine rhinotracheitis vaccine.1974