Feed intake, rectal temperature, and serum mineral concentrations of feedlot cattle fed zinc oxide or zinc methionine and challenged with infectious bovine rhinotracheitis virus4

Abstract

Three experiments were conducted using feedlot steers in a randomized block design to determine the effect of zinc methionine (ZnMet) and zinc oxide (Exp. 3) on feed intake (DMI), rectal temperature, and serum mineral concentrations of feedlot cattle challenged with infectious bovine rhinotracheitis virus (IBRV). All the steers used were seronegative to IBRV. Steers were adapted for 7 d to their respective diets and challenged with 3.7 x 10(5) plaque forming units of IRBV on d 0 of each experiment. Live BW, rectal temperature, and individual daily DMI were recorded for 14 d. Blood samples were taken on d 0, 7, and 14. In Exp. 1, daily DMI of the control steers (Zn = 31 ppm) decreased 50% compared with 15% in the ZnMet (Zn = 90 ppm) steers 3 d after IBRV challenge. By d 6, the ZnMet steers had regained their pretrial mean daily DMI, but the control steers took 11 d. The ZnMet steers had lower (P less than .05) mean rectal temperature than the control steers on d 7 and 12. In Exp. 2, the control (Zn = 35 ppm) steers had lower (P less than .05) daily DMI on d 8 to 12 than the ZnMet (Zn = 89 ppm) steers. In Exp. 3, the mean decrease in daily DMI tended to be more rapid in the ZnO steers than in the control and ZnMet steers. All steers had the lowest daily DMI on d 5 and 6, coinciding with the highest rectal temperature. Serum Zn, P, and Mg concentrations decreased and serum Cu increased in all steers after infection. These data suggest that dietary Zn enhanced the recovery rate of IBRV-stressed cattle.

Effect of organic trace minerals supplementation during early postpartum on milk composition, and metabolic and hormonal profiles in grazing dairy heifers

“…Moreover, if this complex is complemented with Mn-, and Cu-specific aminoacids complexes and cobalt glucoheptonate, further improvement of milk production, reproductive performance and claw integrity is observed (Nocek et al, 2000;Bicalho et al, 2007). Several studies have also reported improvements in reproductive performance, immune response and hoof health in ruminants supplemented with these minerals (Hutcheson, 1990;Chirase et al, 1991;Graham, 1991;Campbell et al, 1999;Nocek et al, 2000;Lucy, 2001;Margerison et al, 2002) but we have not found reports on how this supplementation may affect the plasma concentrations of metabolites and metabolic hormones. Moreover, the experimental designs have been performed under stabulation conditions with controlled nutritional schemes and less is known about its repercussions under grazing conditions.…”

Effect of Feeding a Combination of Zinc, Manganese and Copper Methionine Chelates of Early Lactation High Producing Dairy Cow

“…Supplementation of Zn methionine to a basal diet containing more than 25 mg Zn/kg DM had no effect on feed intake ewes. Feed intake was not significantly affected by Zn source or level during the experiment [24]. The feed intake tended to drop less in zinc methionine fed calves challenged with infectious Bovine Rhinotracheits (IBR) compared to ZnO fed calves.…”

Therapeutic Efficacy of Zinc Sulphate Used in Clustered Model Treatment in Alleviating Zinc Deficiency in Cattle and Its Effect on Hormones, Vitamins and Production Parameters

“…Gershwin and colleagues (1985) reported that zinc plays an indispensable role in the development and maintenance of immunocompetence. Zinc supplementation enhanced the recovery rate of cattle su¡ering from infectious bovine rhinotrachitis virus (Chirase et al, 1991). Zinc is an important factor/cofactor in various metabolic pathways, and a decrease in AST and ALT levels was observed in zinc-de¢cient cattle.…”