Recommended Criteria for Assessing the Success or Failure of Passive Transfer in Dairy Calves
Passive Transfer Status | Serum IgG, mg/mL | Serum Total Protein, g/dL | Calves in Category, % |
|---|---|---|---|
Excellent | ≥ 25.0 | ≥ 6.2 | > 40 |
Good | 18.0–24.9 | 5.8–6.1 | approximately 30 |
Fair | 10.0–17.9 | 5.1–5.7 | approximately 20 |
Poor | < 10.0 | < 5.1 | < 10 |
Modified from Godden SM, Lombard JE, Woolums AR. Colostrum management for dairy calves. Vet Clin North Am Food Anim Pract. 2019;35(3):535-556. doi:10.1016/j.cvfa.2019.07.005 and from Lombard J, Urie N, Garry F, et al. Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States. J Dairy Sci. 2020;103(8):7611-7624. doi:10.3168/jds.2019-17955 | |||
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