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Abstract

A field trial was conducted between 1 December 1991 and 1 November 1992 to determine the effect of pre-milking teat disinfection (pre-dipping) on several measures of mastitis in a commercial Holstein dairy farm where the predominant organisms isolated from intramammary infections were coagulase...

Author(s)
Ruegg, P. L.; Dohoo, I. R.
Citation
Canadian Veterinary Journal, 1997, 38, 10, pp 632-636
Abstract

Objective - To determine whether antimicrobial resistance patterns of major mastitis pathogens isolated from milk samples from dairy cows have changed over time. Design - Retrospective study. Sample Population - 8905 bacterial isolates obtained from milk samples submitted to the Wisconsin...

Author(s)
Makovec, J. A.; Ruegg, P. L.
Publisher
American Veterinary Medical Association, Schaumburg, USA
Citation
Journal of the American Veterinary Medical Association, 2003, 222, 11, pp 1582-1589
Abstract

The objective of this observational study was to determine the association of exposure to selected bedding types with incidence of subclinical (SM) and clinical mastitis (CM) in primiparous Holstein dairy cows housed in identical pens at a single facility. At parturition, primiparous cows were...

Author(s)
Rowbotham, R. F.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 6, pp 4707-4717
Abstract

In recent years, the US dairy industry has experienced significant demographic changes, with an increase in the number of large herds. The objectives of the present study were to characterize clinical mastitis occurring in cows on large dairy herds in Wisconsin. Participating herds (n=50) were...

Author(s)
Oliveira, L.; Hulland, C.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 12, pp 7538-7549
Abstract

The objective of this study was to develop a decision tree to evaluate the economic impact of different durations of intramammary treatment for the first case of mild or moderate clinical mastitis (CM) occurring in early lactation with various scenarios of pathogen distributions and use of on-farm...

Author(s)
Pinzón-Sánchez, C.; Cabrera, V. E.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2011, 94, 4, pp 1873-1892
Abstract

Premilking teat sanitation reduces the load of bacteria on teat skin before milking and it is a fundamental practice used to ensure collection of high-quality milk. The objective of this study was to compare reduction in bacterial populations of teat skin after premilking preparation using either...

Author(s)
Baumberger, C.; Guarín, J. F.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 4, pp 2915-2929
Abstract

Objective - To evaluate enterotoxin production, enterotoxin gene distribution, and genetic diversity of Staphylococcus aureus in milk obtained from cows with subclinical mastitis. Sample - Milk samples obtained from 350 cows (1,354 mammary glands) on 11 Wisconsin dairy farms. Procedures - Of 252 S. ...

Author(s)
Oliveira, L.; Rodrigues, A. C.; Hulland, C.; Ruegg, P. L.
Publisher
American Veterinary Medical Association, Schaumburg, USA
Citation
American Journal of Veterinary Research, 2011, 72, 10, pp 1361-1368
Abstract

Mastitis of small dairy ruminants is usually subclinical, and coagulase negative staphylococci have been reported as the most commonly isolated pathogens. Intramammary antimicrobial therapy administered at dry off is one of the most effective tools for mastitis control in dairy cows. The primary...

Author(s)
Spanu, C.; Berger, Y. M.; Thomas, D. L.; Ruegg, P. L.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Small Ruminant Research, 2011, 97, 1/3, pp 139-145
Abstract

Mastitis is the most frequent disease of dairy cows and has well-recognized detrimental effects on animal wellbeing and dairy farm profitability. Since the beginning of modern dairy farming, producers have sought effective methods to minimize the occurrence of mastitis in their herds. The objective ...

Author(s)
Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 12, pp 10381-10397
Abstract

Objective - To compare the minimum inhibitory concentration (MIC) of cephapirin and ceftiofur with MICs of their active metabolites (desacetylcephapirin and desfuroylceftiofur) for selected mastitis pathogens. Sample - 488 mastitis pathogen isolates from clinically and subclinically affected cows...

Author(s)
Cortinhas, C. S.; Oliveira, L.; Hulland, C. A.; Santos, M. V.; Ruegg, P. L.
Publisher
American Veterinary Medical Association, Schaumburg, USA
Citation
American Journal of Veterinary Research, 2013, 74, 5, pp 683-690

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