Abstract

MAYA-ORTEGA, Carlos Abel; MADRID-GARCES, Tomás Antonio  and  PARRA-SUESCUN, Jaime Eduardo. Bacillus subtilis improve digestive organs development, intestinal morphology and growth performance in broilers. rev.udcaactual.divulg.cient. [online]. 2022, vol.25, n.2, e1848.  Epub Oct 25, 2022. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v25.n2.2022.1848.

Regulation in the use of growth promoters antibiotics in animal feed has led to the search for safe nutritional alternatives that improve intestinal health and growth performance in animal, while protecting consumer health. The aim was to assess the effect of Bacillus subtilis on the digestive organs development, intestinal morphology and growth performance in broilers. A total of 192 one-day old Cobb 500 chicks, were randomized and assigned to one of three diets: basal diet free of antibiotics (D1) or basal diet added with 10ppm of avilamicyn (D2) or basal diet added with 50ppm of B. subtilis’s spores (D3) for 42 days. On days 21 and 42 the feed conversion ratio (FCR) and average body weight (ABW) were determined; also, eight birds per treatment were euthanized to assess the development of digestive organs and the histomorphology in the different sections of the small intestine. The use of B. subtilis significantly increased FCR and ABW. On the other hand, B. subtilis significantly small intestine length compared to antibiotic growth promoter, but there was no differences in the weight of the digestive organs between B. subtilis and antibiotic diet, in addition B. subtilis improve villus height and decreased crypt depth significantly. In conclusion, the use of B. subtilis improve growth performance, digestive organs development and small intestine histomorphology in broilers.

Keywords : Antibiotics; Bacillus subtilis; Growth performance; Gut morphology; Broilers.

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