Resumen

CHAVEZ, L. A; LOPEZ, A  y  PARRA, J. E. EL USO DE Enterococcus faecium MEJORA PARÁMETROS PRODUCTIVOS EN POLLOS DE ENGORDE. Rev. Med. Vet. Zoot. [online]. 2016, vol.63, n.2, pp.113-123. ISSN 0120-2952.  https://doi.org/10.15446/rfmvz.v63n1.59358.

The intake of probiotics has been associated with improvements in production parameters such as feed conversion and body weight gain, which is reflected in the development and health of broilers. The objective of this study was to evaluate the inclusion of probiotic strains in broiler feed on growth performance of economic importance. 180 one-day-old male chicks (Cobb) were used and fed with five diets: Commercial diet with and without the addition of antibiotic, to which was added one of three different probiotic strains (Lactobacillus casei, Lactobacillus acidophilus or Enterococcus faecium) in the drinking water (108 CFU/ml) of animals over 42 days. Were evaluated zootechnical parameters: Feed intake, body weight, feed conversion (FC), weight gain (WG); and productive indicators: mortality, american efficiency factor (AFE), production index (PI), european efficiency (EE) y feed efficiency (FE). The statistical design used was a randomized blok. The inclusion of probiotics, specifically E. faecium, improved production parameters (P < 0.05) like: weight (2730 g), conversion (1.55), WG (53.59 g/day), AFE (172), PI (393), EE (400) and AE (63.11%). Therefore, the use of probiotics, especially E. faecium, can be considered as growth promoters throughout the production cycle because the bird proved to have positive effects on productive performance and economic performance of the batch.

Palabras clave : Additives; broiler; lactic acid bacteria; growth promoters; poultry.

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