Journal of Dairy Science
- Print ISSN
- Electronic ISSN
- Impact factor
- Usage rank
- Article count
- Free count
- Free percentage
- PDFs via platforms
- CSA, Sciencedirect, Highwire, and Proquest
Potential risk indicators of retained placenta and other diseases in multiparous cows.
We used a nested case-control design and compared multiparous dairy cows that developed RP (n=32) with cows that remained healthy (H; n=32) or cows that developed OD (n=32) in early lactation. We compared peripartal body condition score (BCS) as well as serum concentrations of α-tocopherol, metaboli...
Short communication: Lameness impairs feeding behavior of dairy cows.
The automated, reliable, and early detection of lameness is an important aim for the future development of modern dairy operations. One promising indicator of lameness is a change in the feeding behavior of a cow. In this study, the associations between feeding behavior and lameness were evaluated....
Short communication: Heritability estimates for susceptibility to Mycobacterium avium subspecies paratuberculosis infection defined by ELISA...
Paratuberculosis (Johne's disease), an enteric disorder in ruminants caused by Mycobacterium avium ssp. paratuberculosis, causes economic losses in excess of $200 million annually to the US dairy industry. Costly diagnostic testing, cumbersome control programs, incurability, and ineffective vaccinat...
A longitudinal study investigating the prevalence of Staphylococcus aureus genotype B in seasonally communal dairy herds.
Staphylococcus aureus is a major mastitis-causing pathogen. Various genotypes have been recently identified in Switzerland but Staph. aureus genotype B (GTB) was the only genotype associated with high within-herd prevalence. The risk of introducing this Staph. aureus genotype into a herd may be incr...
Short communication: Heterosis by environment and genotype by environment interactions for protein yield in Danish Jerseys.
Crossing of lines or strains within and between breeds has been demonstrated to be beneficial for dairy cattle performance. However, even within breed, differences between strains may also give rise to heterosis. A key question is whether an interaction exists between heterosis and environment (H ×...
Evaluation of the sample needed to accurately estimate outcome-based measurements of dairy welfare on farm.
We evaluated cows in 52 high pens (50 farms) for lameness using a 1- to 5-scale locomotion scoring system (1=normal and 5=severely lame; 24.4 and 6% of animals were scored ≥3 or ≥4, respectively). Cows were also given a BCS using a 1- to 5-scale, where 1=emaciated and 5=obese; cows were rarely thin...
Short communication: Monitoring the presence of perfluoroalkyl substances in Italian cow milk.
We used an analytical protocol consisting of liquid-liquid extraction followed by 2 purification steps through solid-phase extraction cartridges and injection on an ultra-performance liquid chromatography-tandem mass spectroscopy system. The analysis of 67 samples of different types of cow milk from...
Inducing ovulation early postpartum influences uterine health and fertility in dairy cows.
The objective of the current study was to evaluate the effect of GnRH early postpartum on induction of ovulation, uterine health, and fertility in dairy cows. Holstein cows without a corpus luteum (CL) at 17±3 DIM were assigned randomly to receive i.m. GnRH (n=245) at 17±3 and 20±3 DIM or remain as...
A screening sampling plan to detect Mycobacterium avium subspecies paratuberculosis-positive dairy herds.
Mycobacterium avium ssp. paratuberculosis (MAP) is the etiological agent of paratuberculosis, a chronic contagious bacterial disease primarily affecting dairy cattle. Paratuberculosis represents a dual problem for the milk production chain: in addition to economic losses to affected herds, MAP may h...
Denaverine hydrochloride and carbetocin increased welfare during and after parturition and enhanced subsequent fertility in cattle.
The objectives of the current study were to investigate the influence of denaverine hydrochloride and carbetocin on softening and dilatation of the birth canal, the need for assistance during parturition, calf mortality, retention of fetal membranes, endometritis, and subsequent fertility. Altogethe...