Abstract

MAYA-ORTEGA,, CARLOS-ABEL; MADRID-GARCES,, TOMÁS-ANTONIO  and  PARRA-SUESCUN,, JAIME-EDUARDO. Effect of Bacillus subtilis on blood metabolites and productive parameters in broiler chickens. Rev.Bio.Agro [online]. 2021, vol.19, n.1, pp.105-116. ISSN 1692-3561.  https://doi.org/10.18684/bsaa(19)105-116.

Antibiotics have been used in animal feed in order to ensure more efficient production, however, the appearance of antibiotic resistant bacteria has caused concern in both consumers and scientific. The aim was to evaluate the effect of Bacillus subtilis on blood parameters and performance in broilers. 72 Cobb 500 broiler chicks, were randomized to 3 diets. A basal diet without antibiotics (D1), or a basal diet supplemented with either 10 ppm of avilamicyn (D2) or 50 ppm of spores of B. subtilis (D3) during 42 days. On days 21 and 42 cumulative weight gain (BW), feed conversion (FCR) was estimated and blood concentrations of alanine aminotransferase (ALT), creatinine, triglycerides, cholesterol, glucose, calcium and phosphorus were evaluated. The use of B. subtilis in the diet improves the performance of broilers, lowers the blood levels of triglycerides, cholesterol and ALT blood concentrations, and increase the blood levels of calcium, phosphorus and glucose. The inclusion of B. subtilis in the diet of broilers is an alternative to the use of antibiotics, as it has positive effects on the blood biochemistry and the performance.

Keywords : Antibiotic; Poultry; Blood biochemistry; Probiotic; Performance.

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