Isolation and characterization of Bacillus subtilis CH16 strain from chicken gastrointestinal tracts for use as a feed supplement to promote weight gain in broilers

Letters in Applied Microbiology
A T V NguyenT-N Phan

Abstract

Spore-forming bacterial strains were isolated from chicken gastrointestinal tracts to develop a heat-stable feed supplement that promotes weight gain in broilers. Seven Bacillus strains having more than 90% sporulation were screened from the isolates and identified to be closely related with Bacillus subtilis and Bacillus licheniformis. Of the seven strains, B. subtilis CH16 was selected to develop a feed supplement for broilers, because it formed 100% heat-stable spores, grew rapidly at 42°C and quickly formed a biofilm. In large-scale trials in broilers (n ≥ 1150 per group), the group fed CH16 (3 × 10(6) CFU g(-1) pellet) showed higher average daily gain (ADG = 61·16) and lower food conversion ratio (FCR = 1·696) than did the group fed B. licheniformis CH22 (ADG = 57·10 and FCR = 1·792), the group fed B. subtilis HU58 (ADG = 51·90 and FCR = 1·868), BioPlus group (ADG = 59·32 and FCR = 1·807) and the control group (ADG = 56·02 and FCR = 1·880). In conclusion, CH16 spores significantly increased ADG by 9·17% and reduced FCR by 9·79% in broilers. The result supports the use of B. subtilis CH16 of chicken intestinal origin as a feed supplement that promote weight gain in broilers. Significance and impact of the study: This study ...Continue Reading

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Citations

Jan 31, 2017·Biotechnology Journal·Jee Loon FooMatthew Wook Chang
Aug 9, 2019·Canadian Journal of Microbiology·Alejandro Penaloza-VazquezPatricia Rayas-Duarte
Oct 1, 2020·Journal of Animal Physiology and Animal Nutrition·Mohamed E Abd El-HackMahmoud Alagawany
Jun 17, 2020·The Journal of General and Applied Microbiology·Uraisha RamluckenRajesh Lalloo
Aug 14, 2019·Biotechnology and Applied Biochemistry·Monia BlibechHichem Chouayekh
Jul 26, 2017·Journal of the Science of Food and Agriculture·Ameny Farhat-KhemakhemHichem Chouayekh
Feb 20, 2019·Current Microbiology·Paul Priyodip, Seetharaman Balaji

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