Hematology and biochemistry reference values for female Holstein cattle

Area of Science:

• Veterinary Medicine
• Animal Science
• Clinical Pathology

Background:

• Establishing accurate reference intervals is crucial for diagnosing health issues in livestock.
• Holstein cattle are a widely managed dairy breed, making breed-specific data valuable.
• Variations in reference intervals can occur due to age, management, and other factors.

Purpose of the Study:

• To determine reference intervals for hematology and biochemistry variables in clinically normal female Holstein cattle.
• To investigate the influence of age and farm management on these hematological and biochemical parameters.
• To provide a data set for assessing the health status of Holstein cattle populations.

Main Methods:

• Blood samples were collected from 172 clinically normal, randomly selected female Holstein cattle across six farms.
• Four distinct age groups were defined for analysis.
• 14 hematology and 32 biochemistry variables were measured.
• Statistical analysis, including parametric and nonparametric methods, was used after outlier and distribution checks.

Main Results:

• Significant differences in many hematology and biochemistry variables were observed between the different age groups.
• Few significant differences were found between cattle from different farms, suggesting consistent management practices.
• Established reference intervals provide a baseline for normal values in this population.

Conclusions:

• Age is a significant factor influencing hematology and biochemistry values in female Holstein cattle.
• Farm management practices, in this study, did not substantially alter key blood parameters.
• The generated reference intervals are valuable for veterinary diagnostics and herd health management in Holstein cattle.