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The development of the immune system of neonatal foals relies, in part, on the absorption of immunoglobulins subsequent to the ingestion of colostrum to confer humoral immunity. Failure of transfer of passive immunity in foals has been associated

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in Journal of the American Veterinary Medical Association

Introduction Calves are born agammaglobulinemic and rely on colostrum ingestion to absorb essential immunoglobulins for defense against disease. 1 Adequate transfer of passive immunity (ATPI) through colostrum is dependent on; 1) whether the

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in Journal of the American Veterinary Medical Association

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

Summary

Observations were made on development of diarrhea in special - fed calves (n = 460) on 8 commercial facilities during 2 successive 16-week production cycles at weeks 0, 2, 4, 8, 12, and 16. A total of 23% were affected, with peak number of calves with diarrhea observed at week 0. Suspected enteropathogens were identified in 86 % of these calves, most commonly cryptosporidia, coronavirus, and rotavirus. Identified potential zoonotic pathogens included Giardia and Salmonella spp and verotoxigenic Escherichia coli. Noncytopathic bovine viral diarrhea virus was isolated from 6 calves that had repeated bouts of illness. Only 22% of calves entering the veal facilities had adequate transfer of passive immunity. At week 0, serum IgG concentration in calves that subsequently died or had diarrhea was lower (P < 0.001) than that in healthy calves. All calves that died (n = 6) during the first 4 weeks of production had complete failure of transfer of passive immunity.

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in American Journal of Veterinary Research

model could increase skills scores for individuals without previous laparoscopic experience. See page 1079 Stored equine colostrum for treatment of foals at risk for failure of transfer of passive immunity Results of a new study indicate

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in Journal of the American Veterinary Medical Association

assay, single radial immunodiffusion, and indirect methods for the detection of failure of transfer of passive immunity in dairy calves? J Vet Intern Med 2008 ; 22 : 212 – 218 . 10.1111/j.1939-1676.2007.0013.x 5. Ameri M Wilkerson MJ

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in Journal of the American Veterinary Medical Association

confinement, failure of transfer of passive immunity, poor maternal milk production, or weather-related conditions that make it challenging for the calf to nurse. 16 – 18 While no studies in the US have investigated the prevalence of failure of transfer of

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in Journal of the American Veterinary Medical Association

. A risk of misclassification exists for neonatal calves with IgG concentration near proposed threshold values for failed transfer of passive immunity. For sera that require dilution, it may be appropriate to state that the calf has adequate absorption

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in American Journal of Veterinary Research

dairy producers should harvest colostrum as soon as possible after calving to optimize transfer of passive immunity in neonatal calves. In a study involving 81 multiparous dairy cows from a single herd, regression analysis was used to test whether

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in Journal of the American Veterinary Medical Association
in American Journal of Veterinary Research