Authors: Bernárdez, Paula Fajardo¹; González, Clara Fucinosños¹; Méndez Batá, Jesús²; Castro, Lorenzo Pastrana¹; Guerra, Nelson Pérez¹

Source: Journal of Food Protection®, Volume 71, Number 9, September 2008 , pp. 1797-1805(9)

Publisher: International Association for Food Protection

Abstract:

The production of biomass and antibacterial extracellular products by Lactobacillus casei subsp. casei CECT 4043 was followed in both batch and in realkalized fed-batch cultures. Enhanced concentrations of biomass and antibacterial extracellular products were obtained with the use of the latter fermentation technique in comparison with the batch mode. The culture obtained by fed-batch fermentation was mixed with skim milk and used to prepare a probiotic feed for weaned piglets. To test the effect of the potentially probiotic culture of L. casei on body weight gain, feed intake, feed conversion efficiency, and on fecal coliform counts of piglets, two groups of animals received either feed supplemented with the probiotic preparation or avilamycin for 28 days. The control group was fed nonsupplemented feed. At the end of the administration period (day 28), the groups receiving probiotic and avilamycin exhibited the highest average body weight gain values, although the mean feed intake and feed conversion efficiency values were not different among the groups (P > 0.05). For the entire experimental period (42 days), the control group exhibited the lowest feed intake value, the probiotic group exhibited the highest feed conversion efficiency value, and the antibiotic group exhibited the highest body weight gain (P < 0.05). Interestingly, no significant difference in body weight gain was observed between the probiotic and the control groups by day 42 (P > 0.05). Fecal coliform values decreased (although not significantly) by day 28 in the three groups. However, the mean counts returned to pretreatment levels by day 42 in all groups.

Document Type: Research article

Affiliations: 1: Departamento de Química Analítica y Alimentaria, Facultad de Ciencias de Orense, Universidad de Vigo, Las Lagunas s/n, 32004 Orense, Spain 2: Cooperativas Orensanas Sociedad Cooperativa Ltda. Polígono San Ciprián de Viñas, 32901, Orense, Spain

Publication date: 2008-09-01

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