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J. Dairy Sci. 87:976-979
© American Dairy Science Association, 2004.

Short Communication: Influence of Staphylococcus aureus Intramammary Infection on Serum Copper, Zinc, and Iron Concentrations

J. R. Middleton1, C. D. Luby1, L. Viera1, J. W. Tyler1 and S. Casteel2

1 Department of Veterinary Medicine and Surgery, University of Missouri, Columbia 65211
2 Veterinary Medicine Diagnostic Laboratory, University of Missouri, Columbia 65211

Corresponding Author: J. R. Middleton; e-mail: middletonjr{at}missouri.edu.

The goal of the present study was to characterize changes in serum trace mineral concentrations in cattle with experimentally induced Staphylococcus aureus mastitis. Nine primiparous Holstein-Friesian cattle were challenged with approximately 150 cfu of Staph. aureus ATCC29740 by intramammary infusion on d 6, 7, and 8 of lactation. Serum Cu, Zn, and Fe concentrations were determined immediately before and at 24, 48, and 72 h after the final intramammary infusion of Staph. aureus. Infection status (cfu/mL of Staph. aureus), milk somatic cell count, and mastitis score were also determined at these times. Infection resulted in a decrease in mean serum Cu, Zn, and Fe concentrations to 89, 83, and 81% of preinfection concentrations at 24 h postchallenge. One-way analysis of variance for repeated measures demonstrated a significant change in serum zinc concentration. The reductions in trace mineral concentrations were of less magnitude than observed following experimental E. coli mastitis.

Key Words: Staphylococcus aureus • mastitis • copper • zinc • iron




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J. L. Ma, J. F. Wang, K. Wang, C. X. Wu, T. Lai, and Y. H. Zhu
Short Communication: Changes in Micromineral, Magnesium, Cytokine, and Cortisol Concentrations in Blood of Dairy Goats Following Intramammary Inoculation with Staphylococcus aureus
J Dairy Sci, October 1, 2007; 90(10): 4679 - 4683.
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