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

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Abstract

The objective of this study was to describe relationships among compost bedded pack barn (CBP) measurements (moisture, internal temperature, nutrient content, and bedding bacterial counts), ambient weather conditions, and udder health. Data was collected every 2-weeks (n=25 visits) from 8 Kentucky...

Author(s)
Eckelkamp, E. A.; Taraba, J. L.; Akers, K. A.; Harmon, R. J.; Bewley, J. M.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Livestock Science, 2016, 190, pp 35-42
Abstract

Author(s)
Harmon, R. J.; Langlois, B. E.
Citation
Agri-Practice, 1989, 10, pp 29-32, 34
Abstract

During a 14-month period, 77 multiparous and 36 primiparous cows were sampled to determine the prevalence of staphylococci during the periparturient period. Distal streak canal swabs were taken at 14 days pre partum, and foremilk was sampled on the first 5 consecutive wk of lactation. ...

Author(s)
Matthews, K. R.; Harmon, R. J.; Langlois, B. E.
Citation
Journal of Dairy Science, 1992, 75, 7, pp 1835-1839
Abstract

A 20-month split-herd study was used to compare the effect of 1% iodophor (I) or 1.94% linear dodecyl benzene sulphonic acid (LDBSA) teat dips on Staphylococcus spp. prevalence in primiparous cows during various stages of lactation. Only cows calving after the initiation of the trial were included...

Author(s)
Harmon, R. J.; Langlois, B. E.; Akers, K. A.; Smith, B. A.; Varney, L. A.; Crist, W. L.; Hemken, R. W.
Citation
Journal of Dairy Science, 1990, 73, Supplement 1, pp 257
Abstract

The nares, haircoat, vagina, teat skin and streak canal of 103 heifers aged from 1-day-old to 2 years and housed under various conditions or at pasture yielded 2706 staphylococcal strains from 3612 bacterial isolates. Other organisms included Bacillus, Micrococcus, Corynebacterium and coliforms....

Author(s)
White, D. G.; Harmon, R. J.; Matos, J. E. S.; Langlois, B. E.
Citation
Journal of Dairy Science, 1989, 72, 7, pp 1886-1892
Abstract

Author(s)
Langlois, B. E.; Harmon, R. J.; Akers, K. A.
Citation
Journal of Dairy Science, 1983, 66, Suppl.1, pp 203
Abstract

Overall new infection frequency in uninfected quarters was approx. 2 times greater than in coagulase-negative Staphylococcus infected quarters (P<0.05). New infections by minor pathogens (coagulase-negative staphylococci) were greater (P<0.05) in uninfected quarters than in quarters with...

Author(s)
Matthews, K. R.; Harmon, R. J.
Citation
Journal of Dairy Science, 1989, 72, Suppl. 1, pp 21
Abstract

Microbiological data from 1123 uninfected quarters and 216 quarters with pre-existing coagulase-negative staphylococci infections were analysed to determine the influence of infection status on subsequent new infection rate. Overall, prevalence of new infections in uninfected quarters was approx....

Author(s)
Matthews, K. R.; Harmon, R. J.; Langlois, B. E.
Citation
Journal of Dairy Science, 1991, 74, 6, pp 1855-1859
Abstract

A simple agar plate system based on susceptibility to lysostaphin and bacitracin to differentiate between staphylococci and micrococci is described. The system also uses susceptibility to novobiocin to aid in identification to species level of staphylococci. Growth from the agar plate can be used...

Author(s)
Langlois, B. E.; Harmon, R. J.; Akers, K.
Citation
Journal of Food Protection, 1988, 51, 1, pp 24-28
Abstract

The purpose of this study was to determine the composition of the staphylococcal flora of bovine body sites and milk. The efficacy of (i) Baird-Parker agar, (ii) Baird-Parker agar with bacitracin (0.8 µg/ml), (iii) Baird-Parker agar supplemented with acriflavin (7 µg/ml), polymyxin (20 units/ml)...

Author(s)
White, D. G.; Matos, J. S.; Harmon, R. J.; Langlois, B. E.
Citation
Journal of Food Protection, 1988, 51, 9, pp 685-690

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