Fecha/hora: 04/06/2024 06:56:50

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	19/07/2023	
Fecha de la última actualización: 	19/07/2023	
Autoria: 	BRANCO-LOPES. R.; BERNAL-CÓRDOBA, C.; VALLDECABRES, A.; WINDER, C.; CANOZZI, M.E.A.; SILVA-DEL-RÍO, R.	
Afiliación: 	R. BRANCO-LOPES, Veterinary Medicine Teaching and Research Center, Tulare, CA 93274; C. BERNAL-CÓRDOBA, Veterinary Medicine Teaching and Research Center, Tulare, CA 93274; A. VALLDECABRES, Teagasc, Animal and Grassland Research and Innovation Center, Moorepark, Fermoy, Co. Cork, Ireland P61 C996; C. WINDER, Department of Population Medicine, University of Guelph, Guelph, ON, Canada, N1G 2W1; MARÍA EUGENIA ANDRIGHETTO CANOZZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; N. SILVA-DEL-RÍO, Veterinary Medicine Teaching and Research Center, Tulare, CA 93274; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis 95616.	
Título: 	Characterization of controlled trials on probiotic supplementation to dairy calves: A scoping review.	
Año de publicación: 	2023	
Fuente/Imprenta: 	Journal of Dairy Science. 2023, https://doi.org/10.3168/jds.2022-23017  --- [In Press, Corrected Proof]. OPEN ACCESS.	
ISSN: 	0022-0302	
DOI: 	10.3168/jds.2022-23017	
Idioma: 	Inglés	
Notas: 	Article history: Received 10 November 2022, Accepted 13 February 2023, Available online 16 June 2023. -- Correspondence author: silvadelrio@ucdavis.edu -- LICENSE: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). -- FUNDING: This project was supported by the California Department of Food and Agriculture Antimicrobial Use Stewardship (Sacramento, CA).	
Contenido: 	The objective of this scoping review was to identify, describe, and characterize the literature on probiotic supplementation in dairy calves. Eligible studies were nonrandomized, quasi-randomized and randomized controlled trials in English, Spanish, or Portuguese that evaluated the effect of probiotic supplementation on growth and health of dairy calves. The search strategies were based on a modification of the PICO (Population, Intervention, Comparator, Outcome) framework and used synonyms and words related to "dairy calves" (population), "probiotics" (intervention), and "growth and health measurements" (outcomes). No restrictions for publication year or language were applied. Searches were conducted in Biosis, CAB Abstracts, Medline, Scopus, and the Dissertations and Theses Database. In total, the search identified 4,467 records, of which 103 studies (110 controlled trials) met the inclusion criteria. The studies were published between 1980 and 2021 and originated from 28 countries. Trials were randomized (80.0%), nonrandomized 16.4%), and quasi-randomized (3.6%), ranging in sample size from 5 to 1,801 dairy calves (mode = 24; average = 64). Enrolled calves were frequently Holstein (74.5%), males (43.6%), and younger than 15 d at the beginning of probiotic supplementation (71.8%). Often, trials were conducted in research facilities (47.3%). Trials evaluated probiotics with single or multiple species of the same genus: Lactobacillus (26.4%), Saccharomyces (15.4%), Bacillus (10.0%), Enterococcus (3.6%), or multiple species of various genera (31.8%). Eight trials did not report the probiotic species used. Lactobacillus acidophilus and Enterococcus faecium were the species most supplemented to calves. The duration of probiotic supplementation ranged from 1 to 462 d (mode = 56; average = 50). In trials with a constant dose, it ranged from 4.0 × 106  to 3.7 × 1011 cfu/calf per day. Most probiotics were administered mixed solely into feed (88.5%; whole milk, milk replacer, starter, or total mixed ration) and less frequently orally as a drench or oral paste (7.9%). Most trials evaluated weight gain (88.2%) as a growth indicator and fecal consistency score (64.5%) as a health indicator. Our scoping review summarizes the breadth of controlled trials evaluating probiotic supplementation in dairy calves. Differences in intervention design (mode of probiotic administration, dose, and duration of probiotic supplementation) and outcomes evaluation (type and methods) justify future efforts toward standardized guidelines in clinical trials. © 2023, The Authors. Published by Elsevier Inc. and Fass Inc. on behalf of the American Dairy Science Association®.	
Palabras-Clave: 	Calf; Direct-fed microbial; Feed additive; Review.	
Categoría del tema: 	L02 Alimentación animal	
URL: 	https://www.sciencedirect.com/science/article/pii/S0022030223003533/pdf	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (103606-1) - PXI - AP - DD - Journal of Dairy Science/2023 -  -  - DIS