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Veterinary information to support practice, based on evidence and continuing education

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Abstract

Dairy heifers represent the future of a dairy herd, and are expected to freshen with a healthy and well-developed udder, capable of producing an optimal amount of high quality milk. A high proportion of heifers have infected mammary quarters at calving, with coagulase-negative staphylococci (CNS)...

Author(s)
Piepers, S.; Vliegher, S. de; Kruif, A. de; Opsomer, G.; Barkema, H. W.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Microbiology, 2009, 134, 1/2, pp 113-120
Abstract

Non-aureus staphylococci (NAS) are the bacteria most frequently isolated from bovine milk. Objectives of this study were to determine herd-level associations between antimicrobial use (AMU) and prevalence of antimicrobial resistance (AMR) and antimicrobial resistance genes in NAS according to...

Author(s)
Nobrega, D. B.; Buck, J. de; Barkema, H. W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 8, pp 7425-7436
Abstract

Staphylococcus species, categorized into Staphylococcus aureus and non-aureus staphylococci (NAS), are frequent causes of mastitis in dairy cattle around the world. Current treatments using antimicrobials are under increasing scrutiny due to rising prevalence of multi-drug resistance in S. aureus....

Author(s)
Qu Yue; Zhao HuaNan; Nobrega, D. B.; Cobo, E. R.; Han Bo; Zhao ZhongHua; Li ShuMei; Li MengYue; Barkema, H. W.; Gao Jian
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 2, pp 1571-1583
Abstract

Antimicrobial dry cow therapy (DCT) is an important component of mastitis control programs aimed to eliminate existing intramammary infections and prevent the development of new ones during the dry period. However, to what extent the microbiota profiles of different niches of the udder change...

Author(s)
Derakhshani, H.; Plaizier, J. C.; Buck, J. de; Barkema, H. W.; Khafipour, E.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 11, pp 10191-10205
Abstract

Mastitis is the most prevalent and costly disease in dairy cattle worldwide, with implications for animal health and welfare as well as production and economics. Nonlactating heifers are an often-neglected group of animals concerning mastitis management, as they are assumed to be free of mastitis....

Author(s)
Naqvi, S. A.; Buck, J. de; Dufour, S.; Barkema, H. W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 4, pp 3233-3247
Abstract

Emergence and spread of antimicrobial resistance is a major concern for the dairy industry worldwide. Objectives were to determine: (1) phenotypic and genotypic prevalence of drug-specific resistance for 25 species of non-aureus staphylococci, and (2) associations between presence of resistance...

Author(s)
Nobrega, D. B.; Naushad, S.; Naqvi, S. A.; Condas, L. A. Z.; Saini, V.; Kastelic, J. P.; Luby, C.; Buck, J. de; Barkema, H. W.
Publisher
Frontiers Media S.A., Lausanne, Switzerland
Citation
Frontiers in Microbiology, 2018, 9, February, pp 256
Abstract

Aerococcus viridans, a firmicutes bacteria widespread in the environment, is increasingly isolated from humans and animals, especially cows with mastitis. However, its pathogenicity in the bovine mammary gland is unclear. The objective was to explore pathogenic potential of putative virulent and...

Author(s)
Liu Gang; Yin JinHua; Han Bo; Barkema, H. W.; Shahid, M.; Buck, J. de; Cobo, E. R.; Kastelic, J. P.; Gao Jian
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Veterinary Microbiology, 2019, 230, pp 202-211
Abstract

The prevalence of antimicrobial resistance (AMR) is increasing in human and animal pathogens, becoming a concern worldwide. However, prevalence and characteristics of AMR of bovine mastitis pathogens in large Chinese dairy herds are still unclear. Therefore, our objective was to determine the AMR...

Author(s)
Cheng Jia; Qu WeiJie; Barkema, H. W.; Nobrega, D. B.; Gao Jian; Liu Gang; Buck, J. de; Kastelic, J. P.; Sun Hong; Han Bo
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 3, pp 2416-2426
Abstract

Background: Staphylococcus aureus, a common cause of bovine mastitis, is known for its ability to acquire to antimicrobial resistance and to secrete numerous virulence factors that can exacerbate inflammation. In addition, alpha-hemolysin has an important role in S. aureus infections, diversity of...

Author(s)
Zhang LiMei; Gao Jian; Barkema, H. W.; Ali, T.; Liu Gang; Deng YouTian; Naushad, S.; Kastelic, J. P.; Han Bo
Publisher
BioMed Central Ltd, London, UK
Citation
BMC Veterinary Research, 2018, 14, 63, pp (2 March 2018)
Abstract

Non-aureus staphylococci (NAS), a heterogeneous group of a large number of species and subspecies, are the most frequently isolated pathogens from intramammary infections in dairy cattle. Phylogenetic relationships among bovine NAS species are controversial and have mostly been determined based on...

Author(s)
Naushad, S.; Barkema, H. W.; Luby, C.; Condas, L. A. Z.; Nobrega, D. B.; Carson, D. A.; Buck, J. de
Publisher
Frontiers Media S.A., Lausanne, Switzerland
Citation
Frontiers in Microbiology, 2016, 7, December, pp 1990

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