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Low doses of lactoferrin supplementation in weaning calves

2020· article· en· W3103248380 on OpenAlexaboutno aff
Marica Simoni

Bibliographic record

VenueActa fytotechnica et zootechnica/Acta fytotechnica et zootechnica · 2020
Typearticle
Languageen
FieldVeterinary
TopicAnimal health and immunology
Canadian institutionsnot available
Fundersnot available
KeywordsColostrumLactoferrinWeaningAnimal scienceMedicineAntibodyBiologyImmunologyBiochemistry

Abstract

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Different trials demonstrated lactoferrin (LF) to possess antimicrobial, antiviral, antimycotic and anti-inflammatory activity. This molecule is an iron-binding protein that could have preventive effects on calf diseases. Several authors studied the effects of LF at doses between 1 and 10 g/calf/day as a supplement in milk administrated to weaning calves. The results are variable and not always consistent. Twenty-two female replacement calves divided into 2 groups (Control-C and Treated-LF) during a 56-d experimental period were employed to investigate the effect of the use of 0.1 g/d of LF during weaning on growth performances, feed efficiency and health status. The field trial was conducted employing an early weaning protocol (49-d of length, excluding the colostral phase). After parturition, density and immunoglobulin G (IgG) content of dam colostrum were measured as a colostrum quality indicator. Only colostrum with at least 50 mg/mL of IgG was bottle-fed to the calf. Morphometric measurements and feedstuff intake were recorded weekly. Health status and milk consumption were evaluated daily. Calves receiving low doses of LF had numerically less incidence of diarrhoea than the C group (P > 0.05). From a statistical point of view, any significant difference was observed between groups both on growth performances and feed efficiency. A trend for an increase of the FCR was found for LF group at weaning (P = 0.099). More researches are needed to define the optimal dose and the real action of LF in weaning calves. Keywords: calf, lactoferrin, pre-weaned, performances, health status References Abdel fattah, A., Mohammed, H., Youssef, M., Saleem, A.-S., & Youniss, I. (2019). Assessment the Calf’s Welfare Due to The Gender, Number of Offspring and Calving Status in Holstein Calves. SVU-International Journal of Veterinary Sciences, 2(1), 119–130. https://doi.org/10.21608/svu.2019.6656.1002 Bartier, A. L., Windeyer, M. C., & Doepel, L. (2015). 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Lactoferrin supplementation to dairy calves. Journal of Dairy Science, 85(5), 1237–1242. https://doi.org/10.3168/jds.S0022-0302(02)74187-8 Legrand, D., Pierce, A., Elass, E., Carpentier, M., Mariller, C., & Mazurier, J. (2008). Lactoferrin structure and functions. In Bioactive components of milk (pp. 163–194). Springer, New York, NY. https://doi.org/10.1007/BF02018076 Lokke, M. M., Engelbrecht, R., & Wiking, L. (2016). Covariance structures of fat and protein influence the estimation of IgG in bovine colostrum. Journal of Dairy Research, 83(1), 58–66. https://doi.org/10.1017/S0022029915000734 Maunsell, F., & Donovan, G. A. (2008). Biosecurity and Risk Management for Dairy Replacements. Veterinary Clinics of North America - Food Animal Practice, 24(1), 155–190. https://doi.org/10.1016/j.cvfa.2007.10.007 Mechor, G. D., Gröhn, Y. T., McDowell, L. R., & Van Saun, R. J. (1992). Specific Gravity of Bovine Colostrum Immunoglobulins as Affected by Temperature and Colostrum Components. 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Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.004
metaresearch head score (Gemma)0.003
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Research integrity, Insufficient payload (model declined to judge)
Consensus categoriesMeta-epidemiology (narrow), Research integrity
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.598
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0040.003
Meta-epidemiology (narrow)0.0020.002
Meta-epidemiology (broad)0.0030.001
Bibliometrics0.0020.004
Science and technology studies0.0000.001
Scholarly communication0.0000.002
Open science0.0050.003
Research integrity0.0030.006
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.072
GPT teacher head0.369
Teacher spread0.298 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; both teacher heads agree on what is shown here.

Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

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Citations2
Published2020
Admission routes1
Has abstractyes

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