Herman W. Barkema
University of Calgary
474 Papers
2.3K Citations
Herman W. Barkema is an academic researcher from University of Calgary. The author has contributed to research in topics: Medicine & Mastitis. The author has an hindex of 74, co-authored 408 publications. Previous affiliations of Herman W. Barkema include Ghent University & University of Prince Edward Island.
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Papers
Comparison of treatment records and inventory of empty drug containers to quantify antimicrobial usage in dairy herds.
Diego B. Nobrega,Jeroen De Buck,S. Ali Naqvi,Gang Liu,Gang Liu,Sohail Naushad,Vineet Saini,Vineet Saini,Herman W. Barkema,Herman W. Barkema +9 more
TL;DR: In comparison to methods used in surveillance programs on AMU in livestock that assume a constant use in all herds, INV provided a herd-level specific quantity of AMU positively correlated with AMU recorded at the animal level in general, and a positive association was observed for the 6 most commonly used antimicrobials.
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Giardia duodenalis and Cryptosporidium spp. in a veterinary college bovine teaching herd
TL;DR: The presence of the zoonotic G. duodenalis assemblage A in 43% of the sequenced samples indicates that there is a potential risk of infection for students and staff at this research and teaching facility, although the roles of cows as sources of giardiasis in humans remain uncertain.
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Genetic parameters of pathogen-specific incidence of clinical mastitis in dairy cows
TL;DR: Results showed that the pathogen-specific traits used in this study should be considered as different traits, and improved recording of pathogen information and mastitis treatments in general is critical for a successful genetic evaluation of udder health.
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Comprehensive Virulence Gene Profiling of Bovine Non-aureus Staphylococci Based on Whole-Genome Sequencing Data.
Sohail Naushad,S. Ali Naqvi,Diego B. Nobrega,Christopher Luby,John P. Kastelic,Herman W. Barkema,Jeroen De Buck +6 more
- 30 Apr 2019
TL;DR: Although the overall number of VFs was not associated with disease severity, increasing numbers of toxin and host immune evasion genes specifically were associated with more severe disease outcomes, suggesting that the development of disease and the interactions ofVFs with the host are complex and determined by the interplay of genes rather than just the presence of virulence genes.
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Antimicrobial resistance in non-aureus staphylococci isolated from milk is associated with systemic but not intramammary administration of antimicrobials in dairy cattle
TL;DR: The either weak or nonexistent association between AMR and antimicrobialbials administered intramammarily suggest that a decrease in AMR of NAS following implementation of selective dry cow therapy would be minimal in comparison to reduced use of systemic antimicrobials.
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