T
Tim A. McAllister
Researcher at Agriculture and Agri-Food Canada
Publications - 907
Citations - 37778
Tim A. McAllister is an academic researcher from Agriculture and Agri-Food Canada. The author has contributed to research in topics: Rumen & Silage. The author has an hindex of 85, co-authored 862 publications receiving 32409 citations. Previous affiliations of Tim A. McAllister include University of Alberta & University of Guelph.
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Journal ArticleDOI
Pathogens of Bovine Respiratory Disease in North American Feedlots Conferring Multidrug Resistance via Integrative Conjugative Elements
Cassidy L. Klima,Cassidy L. Klima,Rahat Zaheer,Shaun R. Cook,Calvin W. Booker,Steve Hendrick,Trevor W. Alexander,Tim A. McAllister +7 more
TL;DR: In this article, the authors determined the prevalence of bovine respiratory disease (BRD)-associated viral and bacterial pathogens in cattle and characterized the genetic profiles, antimicrobial susceptibilities, and nature of antimicrobial resistance determinants in collected bacteria.
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Prevalence and infection pattern of naturally acquired giardiasis and cryptosporidiosis in range beef calves and their dams
TL;DR: This study is the first to document the cumulative prevalence and infection patterns of Giardia and Cryptosporidium in beef cattle under ranch conditions.
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Effects of cinnamaldehyde, garlic and juniper berry essential oils on rumen fermentation, blood metabolites, growth performance, and carcass characteristics of growing lambs ☆ ☆☆
Alexandre V. Chaves,Kim Stanford,Michael E. R. Dugan,L.L. Gibson,Tim A. McAllister,F. H. Van Herk,Chaouki Benchaar +6 more
TL;DR: Feeding cinnamaldehyde, garlic and juniper berry essential oils had little effect on the overall fatty acid composition of back fat and liver and only minor effects on meat flavour characteristics of lambs fed a barley-based concentrate diet ad libitum.
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Effect of Subtherapeutic Administration of Antibiotics on the Prevalence of Antibiotic-Resistant Escherichia coli Bacteria in Feedlot Cattle
Trevor W. Alexander,L. J. Yanke,Edward Topp,Merle E. Olson,Ron Read,Douglas W. Morck,Tim A. McAllister +6 more
TL;DR: The findings of the present study indicated that subtherapeutic administration of tetracycline in combination with sulfamethazine increased the prevalence of tET- and AMP-resistant E. coli in cattle.
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Effects of fungal enzyme preparations on hydrolysis and subsequent degradation of alfalfa hay fiber by mixed rumen microorganisms in vitro.
TL;DR: Fibrolytic enzymes enhance fiber degradation by altering the structure of alfalfa hay by interacting with xylanases and esterases, and are implicated as activities responsible for the initiation of this stimulatory effect.