Full Text Journal Articles by
Author S J LeBlanc

Advertisement

Find full text journal articles






Associations between feeding behaviors collected from an automated milk feeder and disease in group-housed dairy calves in Ontario: A cross-sectional study.

M H Conboy, C B Winder, C Medrano-Galarza, S J LeBlanc, D B Haley, J H C Costa, M A Steele, D L Renaud,

The adoption of automated milk feeders and group housing of preweaning dairy calves has become more common in Canada; however, disease detection in group-housed calves remains a challenge. The aim of this cross-sectional study was to assess whether feeding behavior data collected from a single point in time could be ... Read more >>

J Dairy Sci (Journal of dairy science)
[2021, 104(9):10183-10193]

Cited: 0 times

View full text PDF listing >>



Effects of parity, blood progesterone, and non-steroidal anti-inflammatory treatment on the dynamics of the uterine microbiota of healthy postpartum dairy cows.

O Bogado Pascottini, J F W Spricigo, S J Van Schyndel, B Mion, J Rousseau, J S Weese, S J LeBlanc,

This study evaluated the effects of treatment with meloxicam (a non-steroidal anti-inflammatory drug), parity, and blood progesterone concentration on the dynamics of the uterine microbiota of 16 clinically healthy postpartum dairy cows. Seven primiparous and 9 multiparous postpartum Holstein cows either received meloxicam (0.5 mg/kg SC, n = 7 cows) ... Read more >>

PLoS One (PloS one)
[2021, 16(2):e0233943]

Cited: 1 time

View full text PDF listing >>



Advertisement

Association of metabolic markers with neutrophil function in healthy postpartum dairy cows.

O Bogado Pascottini, T C Bruinjé, R Couto Serrenho, B Mion, S J LeBlanc,

The objective of this study was to evaluate the associations of serum markers for systemic inflammation, liver, mineral, and energy status, and blood neutrophil counts with the function of circulating neutrophils in postpartum dairy cows. Blood samples were collected from 21 healthy Holstein cows at 5, 10, 14, and 21 ... Read more >>

Vet Immunol Immunopathol (Veterinary immunology and immunopathology)
[2021, 232:110182]

Cited: 0 times

View full text PDF listing >>



Dynamics of uterine microbiota in postpartum dairy cows with clinical or subclinical endometritis.

O Bogado Pascottini, S J Van Schyndel, J F W Spricigo, J Rousseau, J S Weese, S J LeBlanc,

Our objectives were to describe and compare the uterine bacterial composition of postpartum Holstein cows diagnosed as healthy (n = 8), subclinical endometritis (SCE; n = 8), or clinical endometritis (CE; n = 5) in the fifth week postpartum. We did metagenomic analyses of 16S rRNA gene sequences from endometrial cytobrush samples at 10, 21, and ... Read more >>

Sci Rep (Scientific reports)
[2020, 10(1):12353]

Cited: 2 times

View full text PDF listing >>



Metabolic markers for purulent vaginal discharge and subclinical endometritis in dairy cows.

O Bogado Pascottini, S J LeBlanc,

This study compares serum markers for systemic inflammation, and liver, mineral, and energy status in samples obtained -7, 1, 3, 5, 7, 14 ± 1, 21 ± 1, and 35 d relative to calving from healthy dairy cows and those diagnosed with purulent vaginal discharge (PVD) or subclinical endometritis (SCE). Metabolites and markers measured in serum ... Read more >>

Theriogenology (Theriogenology)
[2020, 155:43-48]

Cited: 2 times

View full text PDF listing >>



Assessment of associations between transition diseases and reproductive performance of dairy cows using survival analysis and decision tree algorithms.

O Bogado Pascottini, M Probo, S J LeBlanc, G Opsomer, M Hostens,

This study aimed to evaluate the associations between transition cow conditions and diseases TD with fertility in Holstein cows, and to compare analytic methods for doing so. Kaplan-Meier, Cox proportional hazard, and decision tree models were used to analyze the associations of TD with the pregnancy risk at 120 and ... Read more >>

Prev Vet Med (Preventive veterinary medicine)
[2020, 176:104908]

Cited: 3 times

View full text PDF listing >>



Characterizing the attitudes and motivations of Ontario dairy producers toward udder health.

D A Shock, J B Coe, S J LeBlanc, K E Leslie, D Renaud, S Roche, K Hand, M A Godkin, D F Kelton,

Considerable research has focused on identifying risk factors for intramammary infections, yet mastitis remains a pervasive disease on dairy farms. Increasingly, researchers are appreciating the role of dairy producer mindset in determining management style and thus udder health status of the herd. The objective of this study was to explore ... Read more >>

J Dairy Sci (Journal of dairy science)
[2020, 103(5):4618-4632]

Cited: 0 times

View full text PDF listing >>



Review: Relationships between metabolism and neutrophil function in dairy cows in the peripartum period.

S J LeBlanc,

Aspects of neutrophil function are diminished or dysregulated in dairy cows in the weeks just before and after calving, which appears to be an important contributor to the occurrence of retained placenta, mastitis, metritis and endometritis. The timing and mechanisms by which specific elements of neutrophil function are impaired are ... Read more >>

Animal (Animal : an international journal of animal bioscience)
[2020, 14(S1):s44-s54]

Cited: 3 times

View full text PDF listing >>



Comparative efficacy of teat sealants given prepartum for prevention of intramammary infections and clinical mastitis: a systematic review and network meta-analysis.

C B Winder, J M Sargeant, D Hu, C Wang, D F Kelton, S J Leblanc, T F Duffield, J Glanville, H Wood, K J Churchill, J Dunn, M D Bergevin, K Dawkins, S Meadows, B Deb, M Reist, C Moody, A M O'Connor,

A systematic review and network meta-analysis were conducted to assess the relative efficacy of internal or external teat sealants given at dry-off in dairy cattle. Controlled trials were eligible if they assessed the use of internal or external teat sealants, with or without concurrent antimicrobial therapy, compared to no treatment ... Read more >>

Anim Health Res Rev (Animal health research reviews)
[2019, 20(2):182-198]

Cited: 0 times

View full text PDF listing >>



Comparative efficacy of blanket versus selective dry-cow therapy: a systematic review and pairwise meta-analysis.

C B Winder, J M Sargeant, D F Kelton, S J Leblanc, T F Duffield, J Glanville, H Wood, K J Churchill, J Dunn, M D Bergevin, K Dawkins, S Meadows, A M O'Connor,

A systematic review and meta-analysis were conducted to determine the efficacy of selective dry-cow antimicrobial therapy compared to blanket therapy (all quarters/all cows). Controlled trials were eligible if any of the following were assessed: incidence of clinical mastitis during the first 30 DIM, frequency of intramammary infection (IMI) at calving, ... Read more >>

Anim Health Res Rev (Animal health research reviews)
[2019, 20(2):217-228]

Cited: 1 time

View full text PDF listing >>



Comparative efficacy of antimicrobial treatments in dairy cows at dry-off to prevent new intramammary infections during the dry period or clinical mastitis during early lactation: a systematic review and network meta-analysis.

C B Winder, J M Sargeant, D Hu, C Wang, D F Kelton, S J Leblanc, T F Duffield, J Glanville, H Wood, K J Churchill, J Dunn, M D Bergevin, K Dawkins, S Meadows, B Deb, M Reist, C Moody, A M O'Connor,

A systematic review and network meta-analysis were conducted to assess the relative efficacy of antimicrobial therapy given to dairy cows at dry-off. Eligible studies were controlled trials assessing the use of antimicrobials compared to no treatment or an alternative treatment, and assessed one or more of the following outcomes: incidence ... Read more >>

Anim Health Res Rev (Animal health research reviews)
[2019, 20(2):199-216]

Cited: 0 times

View full text PDF listing >>



Effect of health status upon arrival at a single milk-fed veal facility on breakeven purchase price of calves.

D L Renaud, K C Dhuyvetter, S J LeBlanc, D F Kelton, T F Duffield, M W Overton,

Male calves are purchased from the dairy industry in North America to produce red meat. The price paid for male calves varies widely, and it is unclear which variables influence the price paid for each calf. The objective of this study was to assess how the health traits of calves ... Read more >>

J Dairy Sci (Journal of dairy science)
[2019, 102(9):8441-8453]

Cited: 1 time

View full text PDF listing >>



Feed restriction to induce and meloxicam to mitigate potential systemic inflammation in dairy cows before calving.

O Bogado Pascottini, M R Carvalho, S J Van Schyndel, E Ticiani, J W Spricigo, L K Mamedova, E S Ribeiro, S J LeBlanc,

Most dairy cows experience a transient decrease in feed intake in the 1 to 2 wk before calving, which has been associated with systemic inflammation (SI), indicated by increased blood haptoglobin (Hp) concentration. We aimed to characterize the association between prepartum decrease in feed intake and the onset of SI ... Read more >>

J Dairy Sci (Journal of dairy science)
[2019, 102(10):9285-9297]

Cited: 2 times

View full text PDF listing >>



Technical note: Assessment of neutrophil endocytosis and proteolytic degradation and its relationship with phagocytosis and oxidative burst in dairy cows.

O Bogado Pascottini, M Baquero, R Couto Serrenho, S J Van Schyndel, D Bienzle, S J LeBlanc,

Conventional assays of polymorphonuclear cell (PMN, neutrophil) function such as oxidative burst (OB) and phagocytosis (PC) are widely used to evaluate innate immunity in the transition period of dairy cows. Oxidative burst is commonly evaluated by measuring PMN median fluorescence intensity (MFI) involving the release of reactive oxygen species after ... Read more >>

J Dairy Sci (Journal of dairy science)
[2019, 102(10):9396-9400]

Cited: 2 times

View full text PDF listing >>



Dairy farmers' expectations and receptivity regarding animal welfare advice: A focus group study.

S L Croyle, E Belage, D K Khosa, S J LeBlanc, D B Haley, D F Kelton,

Discussion and incorporation of best practices for animal welfare have been increasing in research, and in commercial operations, including through welfare assessment initiatives. The aim of this study was to explore dairy farmers' perceptions about being approached and receiving advice about animal welfare (i.e., lameness, hock injuries, and disbudding practices). ... Read more >>

J Dairy Sci (Journal of dairy science)
[2019, 102(8):7385-7397]

Cited: 5 times

View full text PDF listing >>



Short communication: Associations of udder edema with health, milk yield, and reproduction in dairy cows in early lactation.

E I Morrison, T J DeVries, S J LeBlanc,

Udder edema (UE) is a common condition of cows around calving, but its effects are not well characterized. The objectives of this study were to determine the associations of UE with the incidence of health disorders and with milk yield and reproduction in dairy cows in early lactation. On 3 ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(10):9521-9526]

Cited: 2 times

View full text PDF listing >>



Training method for animal-based measures in dairy cattle welfare assessments.

S L Croyle, C G R Nash, C Bauman, S J LeBlanc, D B Haley, D K Khosa, D F Kelton,

Quantitative assessments of animal welfare are increasingly being used in the dairy industry. It is important to have good precision and accuracy within and among assessors. This study explored the effectiveness of a 3-d training workshop for animal-based measures (ABM) of welfare in dairy cows, in which 14 people were ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(10):9463-9471]

Cited: 1 time

View full text PDF listing >>



Exposure to an unpredictable and competitive social environment affects behavior and health of transition dairy cows.

K L Proudfoot, D M Weary, S J LeBlanc, L K Mamedova, M A G von Keyserlingk,

Social factors are important determinants of disease in humans and and laboratory animals, but less research has been done using farm animals. The objective of this study was to determine if an unpredictable and competitive social environment affects behavior and health during the transition period when dairy cows are at ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(10):9309-9320]

Cited: 3 times

View full text PDF listing >>



Effect of rumen-protected B vitamins and choline supplementation on health, production, and reproduction in transition dairy cows.

E I Morrison, H Reinhardt, H Leclerc, T J DeVries, S J LeBlanc,

The objectives were to determine the effects of a rumen-protected blend of B vitamins and choline (RPBC) on the incidence of health disorders, milk yield, and reproduction in early lactation and the effects on gene expression and liver fat infiltration. A randomized controlled trial in 3 commercial dairy herds (n ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(10):9016-9027]

Cited: 1 time

View full text PDF listing >>



Comparison of cow-side diagnostic techniques for subclinical endometritis in dairy cows.

S J Van Schyndel, O Bogado Pascottini, S J LeBlanc,

A limited number of cow-side diagnostic techniques exist for the diagnosis of subclinical endometritis (SCE) in dairy cattle. The objectives of this study were to compare results of endometrial cytology from samples collected by cytobrush (CB) and low-volume lavage (LVL) and to assess leukocyte esterase (LE) test strips and Brix ... Read more >>

Theriogenology (Theriogenology)
[2018, 120:117-122]

Cited: 4 times

View full text PDF listing >>



Short communication: Validation of methods for practically evaluating failed passive transfer of immunity in calves arriving at a veal facility.

D L Renaud, T F Duffield, S J LeBlanc, D F Kelton,

Providing a sufficient quantity of high-quality colostrum to male and female calves soon after birth is critical to reduce the risk of disease and mortality. Practical tests have not been validated to determine failed passive transfer of immunity upon arrival at veal facilities. There are many challenges to validation, including ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(10):9516-9520]

Cited: 0 times

View full text PDF listing >>



Pegbovigrastim treatment affects gene expression in neutrophils of pasture-fed, periparturient cows.

A Heiser, S J LeBlanc, S McDougall,

Treatment with granulocyte colony-stimulating factor has been reported to increase circulating neutrophil count and enhance neutrophil function in the periparturient cow. It was hypothesized that a commercially available recombinant bovine granulocyte colony-stimulating factor product (pegbovigrastim) affects gene expression profiles of neutrophils and supports neutrophil function in periparturient cows. Hence this ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(9):8194-8207]

Cited: 5 times

View full text PDF listing >>



Effect of health status evaluated at arrival on growth in milk-fed veal calves: A prospective single cohort study.

D L Renaud, M W Overton, D F Kelton, S J LeBlanc, K C Dhuyvetter, T F Duffield,

The objective of this prospective single cohort study was to determine the effect of health status at arrival on growth in milk-fed veal calves. Upon arrival at the veal facility, calves were evaluated using a standardized health scoring system and weighed, and the supplier of the calf was recorded. The ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(11):10383-10390]

Cited: 4 times

View full text PDF listing >>



Milk yield relative to supplement intake and rumination time differs by health status for fresh cows milked with automated systems.

M T M King, K J Sparkman, S J LeBlanc, T J DeVries,

Automated milking systems (AMS) provide the capability of adjusting the amount of supplemental concentrate offered to cows based on parity, days in milk, and milk yield; in many situations, more supplement is provided to those cows with higher production demands. To determine associations of subclinical ketosis (SCK) and blood β-hydroxybutyrate ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(11):10168-10176]

Cited: 0 times

View full text PDF listing >>



Effect of milk production on reproductive performance in dairy herds.

R Rearte, S J LeBlanc, S G Corva, R L de la Sota, I M Lacau-Mengido, M J Giuliodori,

The objective of the present study was to assess the relationship between individual cow milk yield and fertility, accounting for the contextual effect of the herd. A data set including 657,968 lactations from 677 dairy herds in Argentina from 2001 to 2012 was used. The odds of pregnancy by 100 ... Read more >>

J Dairy Sci (Journal of dairy science)
[2018, 101(8):7575-7584]

Cited: 4 times

View full text PDF listing >>



Advertisement


Disclaimer

1.1452 s