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The Scientific World Journal
Volume 2012 (2012), Article ID 562635, 9 pages
Research Article

Effects of Feeding of Two Potentially Probiotic Preparations from Lactic Acid Bacteria on the Performance and Faecal Microflora of Broiler Chickens

1Departamento de Química Analítica y Alimentaria, Facultade de Ciencias de Ourense, Universidade de Vigo, As Lagoas s/n, 32004 Ourense, Spain
2Cooperativas Orensanas Sociedad Cooperativa Ltda (COREN), Polígono San Ciprián de Viñas, 32901 Ourense, Spain

Received 24 January 2012; Accepted 15 February 2012

Academic Editors: G. Tellez and I. Valpotic

Copyright © 2012 Paula Fajardo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of this study was to evaluate the potential of two probiotic preparations, containing live lactic acid bacteria (Lactococcus lactis CECT 539 and Lactobacillus casei CECT 4043) and their products of fermentation (organic acids and bacteriocins), as a replacement for antibiotics in stimulating health and growth of broiler chickens. The effects of the supplementation of both preparations (with proven probiotic effect in weaned piglets) and an antibiotic (avilamycin) on body weight gain (BWG), feed intake (FI), feed consumption efficiency (FCE), relative intestinal weight, and intestinal microbiota counts were studied in 1-day posthatch chickens. The experiments were conducted with medium-growth Sasso X44 chickens housed in cages and with nutritional stressed Ross 308 broiler distributed in pens. Consumption of the different diets did not affect significantly the final coliform counts in Sasso X44 chickens. However, counts of lactic acid bacteria and mesophilic microorganisms were higher in the animals receiving the two probiotic preparations ( 𝑃 < 0 . 0 5 ). In the second experiment, although no differences in BWG were observed between treatments, Ross 308 broilers receiving the probiotic Lactobacillus preparation exhibited the lowest FCE values and were considered the most efficient at converting feed into live weight.