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Abstract

Effects of 24 to 48 h serum Ig concentration on growth and survival of 1000 Holstein heifer calves were evaluated. Average serum Ig for all calves was 25.71 (SD = 19.06) mg/ml with a range of .05 to 108.27. Serum Ig concentrations were below 12 mg/ml in 28% of the heifers. Both season and age of dam contributed significantly to the variation in 24 to 48 h concentrations of serum Ig. Concentration of serum Ig at 24 to 48 h was a significant source of variation affecting average daily gain through the first 180 d of life. Seasonal factors also were significant in influencing rate of gain from birth to 180 d. Age of dam was a significant source of variation in calf weight gains but only for the first 35 d. Mortality was 6.78% for heifers with less than 12 mg/ml serum Ig at 24 to 48 h as compared with 3.33% mortality for calves with greater than 12 mg/ml concentration.

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PubMed ID:: 3135297

DOI:: 10.3168/jds.S0022-0302(88)79684-8

Keywords: Animals,Body Weight,Cattle,growth & development,immunology,Female,Immunization, Passive,veterinary,Immunodiffusion,Immunoglobulins,analysis

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Keywords: Animals, Body Weight, Cattle, growth & development, immunology, Female, Immunization, Passive, veterinary, Immunodiffusion, Immunoglobulins, analysis

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