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A mail survey of factors associated with morbidity and mortality in feedlot calves in southwestern Ontario



A mail survey of factors associated with morbidity and mortality in feedlot calves in southwestern Ontario



Canadian Journal of Comparative Medicine 47(2): 101-107



The design and results of a mail survey of a simple random sample of southwestern Ontario feedlot owners are presented. The survey provided general data about management of feedlot calves and the association between a number of factors and disease and/or death rates. The number of calves purchased was related positively, in a linear manner, to mortality and morbidity rates. Increased levels of morbidity and mortality were noted when the ration was changed to corn silage from dry-hay within the 1st mo. after arrival. It was not clear whether the ration changes preceeded or followed increased rates of morbidity and mortality. Prophylactic levels of antimicrobials in the water supply were associated with increased death losses. Shipping cattle by truck, rather than train, was associated with decreased rates of disease. Processing factors, including using vaccines against respiratory disease, were not associated significantly with mortality or morbidity. Reducing the number of calves, to approximately 100 per group, not changing the ration to silage within the 1st mo. and not using antibiotics in the water supply on arrival could significantly reduce disease and death losses.

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Accession: 001038293

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PMID: 6309344



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