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for protection. It is possible that the variable effects of REHIP are attributable to differences in the activity of anti- R equi antibodies among plasma products. 21 Differences in subisotypes of immunoglobulin G (IgG) in REHIP also might contribute

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in American Journal of Veterinary Research

assessed as a component of a diagnostic investigation in cows that abort. 5 In these circumstances, detection of an appreciable IgG concentration is deemed suggestive of in utero exposure to pathogens. Detection of low serum concentrations of IgG, IgM

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in American Journal of Veterinary Research

multiple factors, including management practices and pathogen exposure potential. Plasma concentrations of immunoglobulins (specifically IgG) in foals that develop septicemia are significantly lower than concentrations in unaffected foals. 1 Complete FPT

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in American Journal of Veterinary Research

generally considered to be adequate if serum IgG concentration is > 1,000 mg/dL in calves that have been fed colostrum. 3 Several steps are critical to ensuring adequate transfer of passive immunity in dairy calves. Of these, the most important is ensuring

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in Journal of the American Veterinary Medical Association

more recent study 8 revealed that clinical mastitis in nonvaccinated cows was nearly 3 times as likely to result in culling or death as clinical mastitis in J5-vaccinated cows. Additionally, higher serum anti-J5 E coli IgG concentration was

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in American Journal of Veterinary Research

Because adequate passive transfer of colostral immunoglobulins is so important to calf survival and health, numerous methods for assessing IgG concentration in bovine colostrum have been developed. Currently, the most accurate method of measuring

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in Journal of the American Veterinary Medical Association

A bsorption of maternal antibodies in neonatal calves is commonly evaluated by measuring immunoglobulin G (IgG) as it is the primary immunoglobulin in bovine colostrum. 1 Radial immunodiffusion assays (RID) are the reference test for measuring

Open access
in American Journal of Veterinary Research

Neonatal calves must ingest colostrum during the first day after birth to acquire passive immunity via the active uptake of maternal IgG across the intestinal epithelium. 1 Suboptimal transfer of passive immunity in dairy calves results in an

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in Journal of the American Veterinary Medical Association

colostrum administration, 8,9 volume of colostrum fed, method of administration, 4 timing of colostral collection, 10 colostral IgG concentration, 11 and dam parity. 11,12 It has been recommended in other reports 4,13,14 that calves should ingest at

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in American Journal of Veterinary Research

serum IgG concentration in calves, determine whether calf age and colostral volume ingested by a calf at first feeding had an effect on colostral volume intake at 12 hours of age, and determine the effect of varying colostral intake and colostral IgG

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in Journal of the American Veterinary Medical Association