Effect of Enterococcus faecium in the development and growth of intestinal broilers

Abstract

In the diet, the animals are exposed to bacteria and toxic substances, where the intestinal epithelium acts as a natural barrier against these pathogens. The intake of probiotic bacteria positively influences the development and function of digestive organs, improving the physiological, nutritional and immunological parameters. The objective of this research was to evaluate different doses of probiotic strain Enterococcus faecium (1g/qq, 1.75g /qq and 2g/qq), on the growth and intestinal development in broilers during their productive stage. The study was carried out for six months in the experimental unit of the Faculty of Agronomic Sciences, University of El Salvador, San Salvador. 100 one-day-old broilers (Arbor Acres) were used; Four groups with four repetitions were used, consisting of six experimental units each. The inclusion of Enterococcus faecium in the feed of broilers in doses of 1.75g / qq of concentrate improved intestinal growth and development, in villi with height of 1,211.34μm, width 147.7μm, and shallow crypts 164.30μm (p <0.05); was reflected in chickens with a final weight of 2,195.5g in the sixth week, an average daily gain of 58.75g during week six and a feed conversion index of 1.85 (p<0.05), which offers an advantage in the poultry industry, because It can be used in feeding throughout the production cycle as a growth promoter, to perceive a significant increase in the weight of broilers, as well as to obtain economic and commercial benefits