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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

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

In the United States, few intramammary antimicrobials exist that are approved for treatment of bovine mastitis; thus, ensuring judicious use of these products is a priority. The objectives of this study were to determine phenotypic susceptibility and presence of selected antimicrobial resistance...

Author(s)
Ruegg, P. L.; Oliveira, L.; Jin, W.; Okwumabua, O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 7, pp 4521-4534
Abstract

Antimicrobials are frequently used for treatment of bovine mastitis and few studies have examined modern treatment strategies on large US dairy farms. The objective of this study was to describe treatment practices for clinical mastitis occurring in cows on large dairy herds in Wisconsin....

Author(s)
Oliveira, L.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 9, pp 5426-5436
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
Abstract

The objective of this study was to analyze relationships between usage of antimicrobial drugs on dairy farms and results of antimicrobial susceptibility testing of mastitis pathogens. Exposure to selected antimicrobial drugs (n=10) was standardized by calculation of the number of defined daily...

Author(s)
Pol, M.; Ruegg, P. L.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2007, 90, 1, pp 262-273
Abstract

Antimicrobials are often used for treatment of bovine mastitis and the possibility of selection for resistant bacteria must be considered. The objectives of this study were to determine the minimum inhibitory concentration of Staphylococcus aureus recovered from cases of clinical and subclinical...

Author(s)
Oliveira, L.; Langoni, H.; Hulland, C.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 4, pp 1913-1920
Abstract

The objectives of this study were to characterize 60-d outcomes after treatment of mild (abnormal milk) and moderate (abnormal milk and abnormal udder) cases of clinical mastitis (CM) occurring in a single quarter of cows on Wisconsin farms (n=4) and to determine risk factors associated with those...

Author(s)
Pinzón-Sánchez, C.; Ruegg, P. L.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2011, 94, 7, pp 3397-3410
Abstract

One hundred thirty-three cows with mild or moderate mastitis in a single quarter were enrolled in a study to determine whether there was any association between results of in vitro antimicrobial susceptibility testing of the causative organism and outcome of treatment. All cows were treated by...

Author(s)
Hoe, F. G. H.; Ruegg, P. L.
Publisher
American Veterinary Medical Association, Schaumburg, USA
Citation
Journal of the American Veterinary Medical Association, 2005, 227, 9, pp 1461-1468
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

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