Effect of Lacto Sacc, Yea Sacc and Toyocerin on the Performances and the Colonization of E. coli in the Small Intestine and Caeca of Broiler Chicken

1 Institute of Animal Science, BG-2230 Kostinbrod, Bulgaria
2 Alltech Inc.,Nicholasville, Kentucky 40356, USA
3 National Diagnostic Research Veterinary Institute, BG-1601 Sofia, Bulgaria
4 University of National and World Economy, BG-1100 Sofia, Bulgaria


CHOTINSKY, D., T. P. LYONS, N. KORUDJISKI and M. KRUSTEVA, 2003. Effect of Lacto Sacc, Yea Sacc and Toyocerin on the performances and the colonization of E. coli in the small intestine and caeca of broiler chicken. Bulg. J. Agric. Sci., 9: 719–724

An experiment was carried out with 750 broiler chickens to evaluate and compare the influence of dietary supplementation of 0.1 % Lacto Sacc, 0.1 % Yea Sacc, 0.01 % Toyocerin and 0.01 % Avotan in the diets on the growth, feed conversion ratio and the number of E. coli in the duodenum, jejunum and caeca of broiler chickens. Broiler chickens, which received diets containing probiotics and Avotan, grew faster than those given the basal diet for the first 4 weeks. Feed conversion ratio was improved following Lacto Sacc, Yea Sacc and Avotan supplementation, but not for the group fed with Toyocerin. supplementation of Lacto Sacc significantly decreased and of Toyocerin increased the number of E. coli in the duodenum. The number of E. coli in the jejunum significantly decreased only with the supplementation of Avotan. There was no significant difference in the number of E. coli in the caeca.

Key words: broiler chicken; probiotics, Avotan; body weight; feed conversion ratio; E. coli; small intestine; duodenum; jejunum; caeca