scholarly journals Extended negative dietary cation-anion difference feeding does not negatively affect postpartum performance of multiparous dairy cows

2013 ◽  
Vol 96 (9) ◽  
pp. 5780-5792 ◽  
Author(s):  
W. Weich ◽  
E. Block ◽  
N.B. Litherland
Keyword(s):  
Dairy Cows ◽  
Postpartum Performance

scholarly journals Effects of Prepartum Dry Matter Intake and Forage Percentage on Postpartum Performance of Lactating Dairy Cows

2001 ◽  
Vol 84 (9) ◽  
pp. 2051-2058 ◽  
Author(s):  
C.S. Holcomb ◽  
H.H. Van Horn ◽  
H.H. Head ◽  
M.B. Hall ◽  
C.J. Wilcox
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Lactating Dairy Cows ◽  
Postpartum Performance

scholarly journals Effect of protein level in prepartum diets on postpartum performance of dairy cows

1999 ◽  
pp. 13-16
Author(s):  
A. F. Park ◽  
Evan C. Titgemeyer ◽  
Michael V. Scheffel ◽  
M. J. Meyer
Keyword(s):  
Dairy Cows ◽  
Protein Level ◽  
Postpartum Performance

The influence of dry period feeding on liver fat and postpartum performance of dairy cows

1999 ◽  
Vol 76 (3-4) ◽  
pp. 275-295 ◽  
Author(s):  
A.T. Tesfa ◽  
M. Tuori ◽  
L. Syrjälä-Qvist ◽  
R. Pösö ◽  
H. Saloniemi ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Liver Fat ◽  
Dry Period ◽  
Postpartum Performance

Antimicrobial susceptibility of mastitis pathogens of dairy cows in Switzerland

2014 ◽  
Vol 156 (10) ◽  
pp. 483-488 ◽  
Author(s):  
F. Rüegsegger ◽  
J. Ruf ◽  
A. Tschuor ◽  
Y. Sigrist ◽  
M. Rosskopf ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Antimicrobial Susceptibility ◽  
Mastitis Pathogens

Effects of Retinoic Acid and 1,25-Dihydroxyvitamin D3 on IFN-gamma Secretion by Mononuclear Leukocytes from Nulliparous and Postparturient Dairy Cattle

2000 ◽  
Vol 70 (3) ◽  
pp. 92-101 ◽  
Author(s):  
Burim Ametaj ◽  
Brian Nonnecke ◽  
Ronald Horst ◽  
Donald Beitz
Keyword(s):  
Retinoic Acid ◽  
Dairy Cattle ◽  
Dairy Cows ◽  
Dairy Cow ◽  
Pokeweed Mitogen ◽  
Mononuclear Leukocytes ◽  
Combined Effects ◽  
Ifn Gamma ◽  
Dihydroxyvitamin D ◽  
1,25 Dihydroxyvitamin D

Individual and combined effects of several isomers of retinoic acid (RA) and 1,25-dihydroxyvitamin D3 (1,25-(OH)2D3) on interferon-gamma (IFN-gamma) secretion by blood mononuclear leukocytes (MNL) from nulliparous and postparturient Holstein cattle were evaluated in vitro. In the first experiment, effects on incubation period (24 to 72 hours) and time of supplementation (0 to 32 hours) with all-trans, 9-cis, 13-cis-, and 9,13-dicis-RAs (0 to 100 nM) on IFN-gamma secretion by pokeweed mitogen (PWM)-stimulated (0 and 10 mug/ml) MNL from nulliparous cattle were evaluated. In the second experiment, MNL from postparturient cows (bled at 0, 2, 4, and 16 days postpartum) were stimulated with PWM (0 and 10 mug/ml) in the presence of RA isomers (9-cis- or 9,13-dicis-RA; 0 to 100 nM), 1,25-(OH)2D3 (0 to 100 nM), or with combinations of these metabolites. The results show that individual isomers of RA had no effect on IFN-gamma secretion by PWM-stimulated MNL from nulliparous or postparturient cows. Furthermore 1,25-dihydroxyvitamin D3 inhibited IFN-gamma secretion by MNL from nulliparous and postparturient dairy cows; however, the degree of inhibition was greater when 9-cis- and 9,13-dicis-RA were also present in the cultures. Finally mononuclear leukocytes from postparturient dairy cows produced substantially less IFN-gamma than did MNL from nulliparous cattle. It is concluded that retinoic acids individually did not affect the capacity of leukocytes from dairy cattle to secrete IFN-gamma. This result is in marked contrast to studies in monogastric species indicating that RAs inhibit IFN-gamma secretion by peripheral blood T cells. Inhibition of IFN-gamma secretion by 1,25-(OH)2D3 was potentiated by 9-cis- and 9,13-di-cis-retinoics acids, suggesting that an excess of dietary vitamins A and D may compromise further the naturally immunosuppressed postparturient dairy cow. Additional research is necessary to determine if the combined effects of these metabolites on IFN-gamma secretion represent an increased susceptibility of the dairy cow to infectious diseases during the periparturient period. Lower secretion of IFN-gamma by MNL from postpartutient dairy cows, relative to nulliparous cattle, suggests that recently-calved cows are naturally immunosuppressed.

Influence of the herbal component of a commercial feed additive on serum parameters, fertility and longevity of dairy cows

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
M Walkenhorst ◽  
S Ivemeyer ◽  
J Spranger ◽  
G Arndt ◽  
R Schaette
Keyword(s):  
Dairy Cows ◽  
Feed Additive ◽  
Serum Parameters ◽  
Commercial Feed
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