Stephen J LeBlanc

Summary

Affiliation: University of Guelph
Country: Canada

Publications

  1. ncbi request reprint Defining and diagnosing postpartum clinical endometritis and its impact on reproductive performance in dairy cows
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 85:2223-36. 2002
  2. ncbi request reprint Short communication: presynchronization using a single injection of PGF2alpha before synchronized ovulation and first timed artificial insemination in dairy cows
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 86:3215-7. 2003
  3. ncbi request reprint The effect of prepartum injection of vitamin E on health in transition dairy cows
    Stephen J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada
    J Dairy Sci 85:1416-26. 2002
  4. ncbi request reprint The effect of treatment of clinical endometritis on reproductive performance in dairy cows
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 85:2237-49. 2002
  5. ncbi request reprint Peripartum serum vitamin E, retinol, and beta-carotene in dairy cattle and their associations with disease
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 87:609-19. 2004
  6. ncbi request reprint Metabolic predictors of displaced abomasum in dairy cattle
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, N1G 2W1, Canada
    J Dairy Sci 88:159-70. 2005
  7. ncbi request reprint Major advances in disease prevention in dairy cattle
    S J LeBlanc
    Population Medicine, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
    J Dairy Sci 89:1267-79. 2006
  8. doi request reprint Effects of meloxicam on milk production, behavior, and feed intake in dairy cows following assisted calving
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    J Dairy Sci 96:3682-8. 2013
  9. pmc Reference limits for biochemical and hematological analytes of dairy cows one week before and one week after parturition
    Gerardo F Quiroz-Rocha
    Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Can Vet J 50:383-8. 2009
  10. doi request reprint Short communication: use of a mechanical brush by Holstein dairy cattle around parturition
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
    J Dairy Sci 96:2339-44. 2013

Collaborators

Detail Information

Publications38

  1. ncbi request reprint Defining and diagnosing postpartum clinical endometritis and its impact on reproductive performance in dairy cows
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 85:2223-36. 2002
    ..73 for pregnancy (took 27% longer to become pregnant), and were 1.7 times more likely to be culled for reproductive failure than cows without endometritis...
  2. ncbi request reprint Short communication: presynchronization using a single injection of PGF2alpha before synchronized ovulation and first timed artificial insemination in dairy cows
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 86:3215-7. 2003
    ..3 and 36.6%, respectively; odds ratio = 1.03, 95% confidence interval, 0.88 to 1.20). Parity and days in milk at insemination were not significant covariates...
  3. ncbi request reprint The effect of prepartum injection of vitamin E on health in transition dairy cows
    Stephen J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada
    J Dairy Sci 85:1416-26. 2002
    ..However, in cows with adequate serum vitamin E, there was no reduction in the incidence of any disease. For clinical application, primiparous animals were most likely to benefit from prepartum injection of vitamin E...
  4. ncbi request reprint The effect of treatment of clinical endometritis on reproductive performance in dairy cows
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 85:2237-49. 2002
    ..u. and with PGF2 alpha was not statistically significant. Treatment of postpartum endometritis should be reserved for cases diagnosed after 26 DIM, based on criteria that are associated with subsequent pregnancy rate...
  5. ncbi request reprint Peripartum serum vitamin E, retinol, and beta-carotene in dairy cattle and their associations with disease
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 87:609-19. 2004
    ..There were significant positive associations of peripartum serum concentrations among each of alpha-tocopherol, beta-carotene, and retinol...
  6. ncbi request reprint Metabolic predictors of displaced abomasum in dairy cattle
    S J LeBlanc
    Department of Population Medicine, University of Guelph, Ontario, N1G 2W1, Canada
    J Dairy Sci 88:159-70. 2005
    ..Serum calcium concentration was not associated with LDA. Strategic use of metabolic tests to monitor transition dairy cows should focus on NEFA in the last week prepartum and BHBA in the first week postpartum...
  7. ncbi request reprint Major advances in disease prevention in dairy cattle
    S J LeBlanc
    Population Medicine, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
    J Dairy Sci 89:1267-79. 2006
    ....
  8. doi request reprint Effects of meloxicam on milk production, behavior, and feed intake in dairy cows following assisted calving
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    J Dairy Sci 96:3682-8. 2013
    ..Future research is warranted to examine the effects of antiinflammatory drugs administered closer to the time of calving on health and production...
  9. pmc Reference limits for biochemical and hematological analytes of dairy cows one week before and one week after parturition
    Gerardo F Quiroz-Rocha
    Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Can Vet J 50:383-8. 2009
    ..Different reference limits for precalving and postcalving dairy cows should be determined for biochemical analytes to ensure appropriate interpretation of results...
  10. doi request reprint Short communication: use of a mechanical brush by Holstein dairy cattle around parturition
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
    J Dairy Sci 96:2339-44. 2013
    ..12, respectively). Further research is warranted to investigate possible benefits of mechanical brush devices at the time of calving, particularly for cows that experience difficult calving and require manual or mechanical assistance...
  11. doi request reprint The effect of administering ketoprofen on the physiology and behavior of dairy cows following surgery to correct a left displaced abomasum
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    J Dairy Sci 96:1511-20. 2013
    ..The apparent differences in appetite or attitude in cows that received ketoprofen reported by producers warrant further investigation...
  12. doi request reprint Postpartum uterine disease and dairy herd reproductive performance: a review
    Stephen J LeBlanc
    Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada N1G 2W1
    Vet J 176:102-14. 2008
    ..Systematic use of prostaglandin F(2alpha) at 5 and 7 weeks postpartum may improve pregnancy rate. The economic benefit of efforts to identify and treat endometritis is herd-specific...
  13. pmc An investigation of the effects of ketoprofen following rumen fistulation surgery in lactating dairy cows
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1 Newby, Pearl, Leblanc, Leslie, Duffield Department of Animal Science, University of California, Davis, California 95616 8521, USA Tucker Animal Welfare Program, University of British Columbia, Vancouver, British Columbia V6T 1Z4 von Keyserlingk
    Can Vet J 55:442-8. 2014
    ..Pain mitigation should be included when performing flank surgery in cattle...
  14. ncbi request reprint Effects of rumen-protected choline and monensin on milk production and metabolism of periparturient dairy cows
    L C Zahra
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 89:4808-18. 2006
    ..The metabolic effects of CRC are consistent with previous studies, and the effects on liver are novel. The mechanism by which RPC increased milk production was not revealed in this study and merits further research...
  15. pmc Economic value of ionophores and propylene glycol to prevent disease and treat ketosis in Canada
    Khaled Gohary
    Department of Population Medicine, Ontario Veterinary College Gohary, Leblanc, Lissemore, Duffield, School of Hospitality, Food and Tourism Management, College of Business and Economics Von Massow, University of Guelph, Guelph, Ontario N1G 2W1, Canada Department of Population Medicine, University of Georgia College of Veterinary Medicine, Athens, Georgia 30602, USA Overton
    Can Vet J 57:733-40. 2016
    ..In conclusion, prevention of diseases that occur in the postpartum period and treatment of ketosis after calving yielded a positive ROI that varies based on disease incidence and method of diagnosis. ..
  16. doi request reprint Short communication: a comparison of 2 nonsteroidal antiinflammatory drugs following the first stage of a 2-stage fistulation surgery in dry dairy cows
    Nathalie C Newby
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    J Dairy Sci 96:6514-9. 2013
    ..It is clear that left flank surgery is painful and that NSAID can improve outcomes associated with that pain, but we cannot make recommendations as to which NSAID to choose based on these results...
  17. doi request reprint Reproductive tract defense and disease in postpartum dairy cows
    Stephen J LeBlanc
    Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
    Theriogenology 76:1610-8. 2011
    ..Presently, commonly recommended best management practices for cows in the transition period are likely to be helpful to mitigate the risk of reproductive disease...
  18. doi request reprint A randomized controlled trial of dexamethasone as an adjunctive therapy to propylene glycol for treatment of hyperketonemia in postpartum dairy cattle
    Elise H Tatone
    Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1
    J Dairy Sci 99:8991-9000. 2016
    ..Based on the small and conditional benefits of dexamethasone and a lack of difference in milk yield or disease incidence, we do not recommend the use of dexamethasone to treat hyperketonemia...
  19. doi request reprint A systematic review and meta-analysis of the diagnostic accuracy of point-of-care tests for the detection of hyperketonemia in dairy cows
    Elise H Tatone
    University of Guelph, Department of Population Medicine, Guelph, ON N1G 2W1, Canada Electronic address
    Prev Vet Med 130:18-32. 2016
    ..Diagnosing HK with blood, urine or milk are valid options, however, the diagnostic inaccuracy of urine and milk should be considered when making economic and treatment decisions. ..
  20. doi request reprint Ketosis treatment in lactating dairy cattle
    Jessica L Gordon
    Department of Population Medicine, Ontario Veterinary College, University of Guelph, 2509 Stewart Building 45, Guelph, Ontario N1G2W1, Canada
    Vet Clin North Am Food Anim Pract 29:433-45. 2013
    ..This article provides an update on ketosis treatment regimens. The ketosis treatment literature is reviewed and the findings are summarized. Current treatment recommendations and areas for future research are provided. ..
  21. doi request reprint The effect of treatment with long-acting antibiotic at postweaning movement on respiratory disease and on growth in commercial dairy calves
    A L Stanton
    Department of Population Medicine, University of Guelph, Guelph, N1G 2W1 Ontario, Canada
    J Dairy Sci 93:574-81. 2010
    ..Moreover, BRD after movement to group housing after weaning had a significant effect on the growth of dairy calves...
  22. ncbi request reprint The effect of a progesterone releasing intravaginal device (PRID) on pregnancy risk to fixed-time insemination following diagnosis of non-pregnancy in dairy cows
    R B Walsh
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Theriogenology 67:948-56. 2007
    ..8% versus 34.9% in PRID-treated versus PID-treated animals. Exogenous progesterone provided through an intravaginal device to non-pregnant cows that had not displayed estrus improved the probability of pregnancy after fixed-time AI...
  23. ncbi request reprint Prevalence and risk factors for postpartum anovulatory condition in dairy cows
    R B Walsh
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
    J Dairy Sci 90:315-24. 2007
    ..The daily probability of pregnancy (hazard ratio) was similar to cycling cows by 165 d in milk. The results underline the important associations of peripartum health with reproductive function and performance...
  24. ncbi request reprint Synchronization of estrus and pregnancy risk in anestrous dairy cows after treatment with a progesterone-releasing intravaginal device
    R B Walsh
    Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
    J Dairy Sci 90:1139-48. 2007
    ..87 d). These results support the efficacy of a PRID to induce estrus in previously anestrous cows. The reason, however, for the variable response between primiparous and multiparous cows was not clear...
  25. ncbi request reprint The effect of subclinical ketosis in early lactation on reproductive performance of postpartum dairy cows
    R B Walsh
    Department of Population Medicine, University of Guelph, Ontario, Canada, N1G 2W1
    J Dairy Sci 90:2788-96. 2007
    ..From this analysis, both the relative circulating concentration of BHBA and the duration of elevated circulating BHBA were negatively associated with the probability of pregnancy at first service...
  26. ncbi request reprint Agreement of predicted 305-day milk yields relative to actual 305-day milk weight yields
    M A Quist
    University of Guelph, Ontario Veterinary College, Guelph, Ontario, Canada, N1G 2W1
    J Dairy Sci 90:4684-92. 2007
    ..There were no ID errors on 3 of 4 farms tested and only a very small number of errors (3/80) on the fourth farm, indicating that the electronic ID systems used in milking parlors identify cows accurately...
  27. doi request reprint Investigating the within-herd prevalence and risk factors for ketosis in dairy cattle in Ontario as diagnosed by the test-day concentration of β-hydroxybutyrate in milk
    Elise H Tatone
    Department of Population Medicine, Guelph Canada, N1G 2W1
    J Dairy Sci . 2016
    ..Milk fat yield during the previous lactation may be representative of energy partitioning...
  28. pmc Safety of a progesterone-releasing intravaginal device as assessed from vaginal mucosal integrity and indicators of systemic inflammation in postpartum dairy cows
    Robert B Walsh
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1
    Can J Vet Res 72:43-9. 2008
    ..There was no significant difference in the circulating haptoglobin concentration between the 3 groups of cows. Culture revealed commensal bacterial growth in the vagina of all the cows...
  29. doi request reprint Short communication: Effect of sampling time relative to the first daily feeding on interpretation of serum fatty acid and beta-hydroxybutyrate concentrations in dairy cattle
    G F Quiroz-Rocha
    Department of Pathobiology, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 93:2030-3. 2010
    ..4 mmol/L if they were sampled 1h before the first feed delivery compared with sampling the same cows 4 or 10h after feeding...
  30. pmc The cost of a case of subclinical ketosis in Canadian dairy herds
    Khaled Gohary
    Department of Population Medicine, Ontario Veterinary College Gohary, Leblanc, Lissemore, Duffield, School of Hospitality, Food and Tourism Management, College of Business and Economics Von Massow, University of Guelph, Guelph, Ontario N1G 2W1 Department of Population Medicine, University of Georgia College of Veterinary Medicine, Athens, Georgia 30602, USA Overton
    Can Vet J 57:728-32. 2016
    ..In conclusion, SCK negatively impacts dairy herds and losses are dependent on the herd-level incidence and factors included in the calculation. ..
  31. doi request reprint Practices for the disbudding and dehorning of dairy calves by veterinarians and dairy producers in Ontario, Canada
    Charlotte B Winder
    Department of Population Medicine, University of Guelph, Ontario, Canada N1G 2W1
    J Dairy Sci 99:10161-10173. 2016
    ..Identification of factors associated with best practices, or the lack of adoption of these practices, may help veterinarians target appropriate educational opportunities for their dairy clients...
  32. doi request reprint Factors associated with survival in the herd for dairy cows following surgery to correct left displaced abomasum
    Jennifer L Reynen
    Department of Population Medicine, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    J Dairy Sci 98:3806-13. 2015
    ..Based on survival analysis, longevity in the herd for 365 d following corrective surgery was associated with higher BHBA and Mg at the time of LDA diagnosis before surgery, as well as milk production following surgery...
  33. doi request reprint Evaluation of a handheld device for measurement of β-hydroxybutyrate concentration to identify prepartum dairy cattle at risk of developing postpartum hyperketonemia
    Elise H Tatone
    Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
    J Am Vet Med Assoc 246:1112-7. 2015
    ..To evaluate the use of a handheld device for measurement of β-hydroxybutyrate (BHBA) concentration to identify prepartum dairy cattle at risk of developing hyperketonemia during the first week after parturition...
  34. doi request reprint Short communication: field evaluation of a pregnancy confirmation test using milk samples in dairy cows
    Stephen J LeBlanc
    Population Medicine, University of Guelph, Canada
    J Dairy Sci 96:2345-8. 2013
    ....
  35. doi request reprint Milking-to-milking variability for milk yield, fat and protein percentage, and somatic cell count
    M A Quist
    University of Guelph, Ontario Veterinary College, Guelph, Ontario, Canada, N1G 2W1
    J Dairy Sci 91:3412-23. 2008
    ..96 +/- 1.05 kg/d) were significant only for first lactation. Understanding the variability in milk yield, fat and protein percentages, and SCC is important when making management decisions and in milk-recording programs...
  36. doi request reprint Randomized clinical trial of a calcium supplement for improvement of health in dairy cows in early lactation
    Cynthia L Miltenburg
    Department of Population Medicine, University of Guelph, ON, Canada N1G 2W1
    J Dairy Sci 99:6550-62. 2016
    ....
  37. doi request reprint Association of bovine respiratory disease or vaccination with serologic response in dairy heifer calves up to three months of age
    M Claire Windeyer
    Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, ON NIG 2WI, Canada
    Am J Vet Res 76:239-45. 2015
    ..To investigate the association of bovine respiratory disease (BRD) or vaccination with serologic response in calves...
  38. pmc Persistence of oxytocin receptors in the bovine uterus during the first 7 d after calving: an immunohistochemical study
    Cyril S Perumamthadathil
    Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1 and EH Graham Centre for Agricultural Innovation, Charles Sturt University, Wagga Wagga, NSW, Australia 2678 Perumamthadathil, Johnson, Leblanc, Chenier Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1 Foster
    Can J Vet Res 78:72-7. 2014
    ..This finding supports the hypothesis that oxytocin may be ecbolic in cows through the 1st week post partum, but further studies are required to assess the receptor functionality during this period. ..