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The occurrence of Haemophilus somnus in feedlot calves and its control by postarrival prophylactic mass medication.

Three field trials were conducted in a large commercial feedlot in Saskatchewan to determine the prevalence of Haemophilus somnus in calves and to evaluate the efficacy of prophylactic mass medication with long-acting oxytetracycline on day 17 (1990, n = 1336), day 11 (1991, n = 4372), or day 8 (199...

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Hlavní autoři: Van Donkersgoed, J, Janzen, E D, Potter, A A, Harland, R J
Médium: Artigo
Jazyk:Inglês
Vydáno: 1994
Témata:
On-line přístup:https://ncbi.nlm.nih.gov/pmc/articles/PMC1686310/
https://ncbi.nlm.nih.gov/pubmed/7994720
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