Serum copper concentrations in beef cows and heifers

Area of Science:

• Veterinary Medicine
• Animal Nutrition
• Agricultural Science

Background:

• Copper is an essential trace mineral vital for numerous physiological functions in cattle.
• Suboptimal copper status can lead to reduced immunity, poor growth, and reproductive issues in beef herds.
• Geographic location and management practices, including supplementation, can influence copper levels.

Purpose of the Study:

• To assess the prevalence of serum copper deficiency in beef cow-calf herds across the United States.
• To evaluate the effectiveness of reported copper supplementation strategies in these herds.

Main Methods:

• A cross-sectional survey involving 2,007 cows and heifers from 256 herds in 18 states.
• Serum samples were analyzed for copper concentration, categorized as deficient, marginally deficient, or adequate.
• Data were compared between herds reporting copper supplement use and those that did not.

Main Results:

• 1.7% of cattle were copper deficient, and 38.9% were marginally deficient.
• Nearly 36% of herds had marginally deficient copper levels, and 0.8% were deficient.
• Approximately half of herds reported copper supplementation, yet a significant portion remained deficient or marginally deficient.

Conclusions:

• Copper deficiency is a prevalent issue across diverse US regions, not limited to specific geographic areas.
• Reported use of copper supplements does not guarantee adequate copper status in beef herds.
• Veterinarians should consider copper deficiency in herds presenting with related clinical signs, irrespective of region or supplementation history.