Effects of different sources of Saccharomyces cerevisiae biomass on milk production, composition, and aflatoxin M 1 excretion in milk from dairy cows fed aflatoxin B 1 .

Autor: Gonçalves BL; Department of Food Engineering, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil, 13633-900., Gonçalves JL; Department of Animal Sciences, School of Veterinary Medicine and Animal Sciences, University of São Paulo, Pirassununga, SP, Brazil, 13633-900., Rosim RE; Department of Food Engineering, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil, 13633-900., Cappato LP; Federal Institute of Education, Science and Technology of Rio de Janeiro, Department of Food Science, Rio de Janeiro, RJ, Brazil, 20260-100., Cruz AG; Federal Institute of Education, Science and Technology of Rio de Janeiro, Department of Food Science, Rio de Janeiro, RJ, Brazil, 20260-100., Oliveira CAF; Department of Food Engineering, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil, 13633-900., Corassin CH; Department of Food Engineering, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga, SP, Brazil, 13633-900. Electronic address: carloscorassin@usp.br.
Jazyk: angličtina
Zdroj: Journal of dairy science [J Dairy Sci] 2017 Jul; Vol. 100 (7), pp. 5701-5708. Date of Electronic Publication: 2017 May 03.
DOI: 10.3168/jds.2016-12215
Abstrakt: The aim of the present study was to evaluate the effect of different sources of Saccharomyces cerevisiae (SC) biomass (20.0 g/d) obtained from sugarcane (cell wall, CW; dried yeast, DY; autolyzed yeast, AY) and the beer industry (partially dehydrated brewery yeast, BY) on milk production, fat and protein percentages, and aflatoxin M 1 (AFM 1 ) excretion in milk from dairy cows receiving 480 µg aflatoxin B 1 (AFB 1 ) per day. A completely randomized design was used with 2 lactating cows assigned to each of 10 dietary treatments, as follows: negative controls (no AFB 1 or SC-based biomass), positive controls (AFB 1 alone), DY alone, DY + AFB 1 , BY alone, BY + AFB 1 , CW alone, CW + AFB 1 , AY alone, and AY + AFB 1 . The cows in the aflatoxin treatment group received AFB 1 from d 1 to 6, while the SC biomass was administered with the AFB 1 bolus from d 4 to 6. Aflatoxin B 1 or SC-based products did not affect milk production or milk composition during the experimental period. Aflatoxin M 1 was detected in the milk from all aflatoxin treatment group cows, reaching maximum levels at d 3 and varying from 0.52 ± 0.03 to 1.00 ± 0.04 µg/L. At end of the treatment period, CW, AY, DY, and BY removed 78%, 89%, 45%, and 50% of AFM 1 from the milk, respectively, based on the highest level found on d 3. Results indicate a potential application of industrial fermentation by-products, especially CW and AY, as a feed additive in the diets of dairy cows to reduce the excretion of AFM 1 in milk.
(Copyright © 2017 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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