Benchmarking passive transfer of immunity and growth in dairy calves
نویسندگان
چکیده
منابع مشابه
Prevalence of failure of passive transfer of immunity in newborn heifer calves and associated management practices on US dairy operations.
Failure of passive transfer of immunity (FPT) in dairy replacement calves has been linked to increased neonatal morbidity and mortality and long-term decreases in productivity. The purpose of this study was to estimate the prevalence of FPT in US dairy heifer calves in 2007 and to use nationally representative data to investigate associations of FPT with colostrum and calf management practices....
متن کاملEvaluation of Digital and Optical Refractometers for Assessing Failure of Transfer of Passive Immunity in Dairy Calves
BACKGROUND Failure of transfer of passive immunity (FTPI) is the underlying predisposing risk factor for most early losses in dairy calves. Refractometers, either optical or digital, can be used to assess FTPI as a part of calf health monitoring program on dairy operations. OBJECTIVES To evaluate the performance of and differences between digital Brix and optical refractometers for assessing ...
متن کاملA Randomized Clinical Trial Evaluating the Effects of Oligosaccharides on Transfer of Passive Immunity in Neonatal Dairy Calves
BACKGROUND Bacterial contamination of colostrum is common and can decrease IgG absorption in neonatal calves. Strategies that mitigate this situation without complicating colostrum management will benefit dairy calf health and survival. OBJECTIVES To evaluate the effects of supplementing colostrum with oligosaccharides (OS) on serum IgG concentration and apparent efficiency of absorption of I...
متن کاملEffect of Saccharomyces Cerevisiae Yeast Metabolites on Colostrum Quality and Passive Immunity Transfer in Calves
Basic nutrients, minerals, total protein and its fractions in colostrum from cows fed feed supplemented with yeast metabolites (60 g/d/animal) in perinatal period, as well as the level of immunoglobulins in calves’ blood serum on the 2 and 35 d of their life were determined. Additionally, the total immunoglobulin index in calves aged 3-4 weeks was calculated. It was demonstrated that feed with ...
متن کاملPassive Transfer of Transplantation Immunity
Passive transfer of transplantation immunity was accomplished in inbred guinea pigs with tritiated thymidine-labeled lymphoid cells sensitized to homologous tissues. Autoradiographs of the homologous skin graft sites disclosed the presence of relatively few or no labeled cells at the site of rejection. Passive transfer of transplantation immunity was also accomplished with sensitized lymphoid c...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 2017
ISSN: 0022-0302
DOI: 10.3168/jds.2016-11800