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Abstract

Mycobacterium avium subsp. paratuberculosis (MAP) is the bacterium that causes Johne's disease in cattle. Although infected cattle can be identified by examining fecal, blood, or milk samples, the gold standard is identification of MAP in tissue samples postmortem. Although tissue samples are...

Author(s)
Corbett, C. S.; Buck, J. de; Barkema, H. W.
Publisher
Sage Publications, Thousand Oaks, USA
Citation
Journal of Veterinary Diagnostic Investigation, 2018, 30, 5, pp 743-746
AbstractFull Text

Author(s)
Wolf, R.; Barkema, H. W.; Buck, J. de; Mortier, R.; Orsel, K.
Publisher
International Association for Paratuberculosis, Sydney, Australia
Citation
Proceedings of the 11th International Colloquium on Paratuberculosis, Sydney, Australia, 5-10 February 2012, 2012, pp 13-14
Abstract

Mycobacterium avium ssp. paratuberculosis (MAP) causes Johne's disease, a production-limiting disease in cattle. Detection of infected herds is often done using environmental samples (ES) of manure, which are collected in cattle pens and manure storage areas. Disadvantages of the method are that...

Author(s)
Wolf, R.; Orsel, K.; Buck, J. de; Kanevets, U.; Barkema, H. W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 4, pp 2950-2955
Abstract

Mycobacterium avium subsp. paratuberculosis (MAP) is the causative bacterium of Johne's disease (JD) in ruminants. The control of JD in the dairy industry is challenging, but can be improved with a better understanding of the diversity and distribution of MAP subtypes. Previously established...

Author(s)
Ahlstrom, C.; Barkema, H. W.; Stevenson, K.; Zadoks, R. N.; Biek, R.; Kao, R.; Trewby, H.; Haupstein, D.; Kelton, D. F.; Fecteau, G.; Labrecque, O.; Keefe, G. P.; McKenna, S. L. B.; Tahlan, K.; Buck, J. de
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2016, 11, 2, pp e0149017
Abstract

Johne's disease, a chronic enteritis caused by Mycobacterium avium ssp. paratuberculosis (MAP), causes large economic losses to the dairy industry worldwide. Fecal shedding of MAP contaminates the environment, feed, and water and contributes to new infections on farm, yet there is limited knowledge ...

Author(s)
Corbett, C. S.; Barkema, H. W.; Buck, J. de
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1478-1487
Abstract

Although Canadian dairy herds have been infected with bovine leukemia virus (BLV) for years, recent research has put new emphasis on the potential negative effects of this infection. Consequently, BLV control is becoming more favorable; however, BLV control cannot be successful without identifying...

Author(s)
Kuczewski, A.; Orsel, K.; Barkema, H. W.; Kelton, D. F.; Hutchins, W. A.; Meer, F. J. U. M. van der
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 3, pp 2433-2437
Abstract

Heifer mastitis, reflected by an elevated somatic cell count (SCC) in early lactation (SCCel), results in a decreased milk production, a higher risk for subclinical and clinical mastitis during lactation, and an elevated culling hazard. The aims of this study were to calculate the costs of heifer...

Author(s)
Huijps, K.; Vliegher, S. de; Lam, T.; Hogeveen, H.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Microbiology, 2009, 134, 1/2, pp 121-127
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

Environmental sampling is an effective method for estimating regional dairy herd-level prevalence of infection with Mycobacterium avium ssp. paratuberculosis (MAP). However, factors affecting prevalence estimates based on environmental samples are not known. The objective was to determine whether...

Author(s)
Corbett, C. S.; Naqvi, S. A.; Buck, J. de; Kanevets, U.; Kastelic, J. P.; Barkema, H. W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 9, pp 8092-8099
Abstract

Johne's disease is a progressive, chronic disease with inflammation of the small intestine of ruminants caused by Mycobacterium avium ssp. paratuberculosis (MAP). Accurately estimating prevalence of MAP infections is important when controlling spread of infection or monitoring effectiveness of...

Author(s)
Corbett, C. S.; Naqvi, S. A.; Bauman, C. A.; Buck, J. de; Orsel, K.; Uehlinger, F.; Kelton, D. F.; Barkema, H. W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 12, pp 11218-11228

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