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Isolation and characterization of a Bacillus spp. for manufacturing the feed additives in livestock
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 Title & Authors
Isolation and characterization of a Bacillus spp. for manufacturing the feed additives in livestock
Park, Hae Suk; Jo, Seung Wha; Yim, Eun Jung; Kim, Yun Sun; Moon, Sung Hyun; Cho, Ho Seong; Kim, Hyun-Young; Cho, Yong Sik; Cho, Sung Ho;
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 Abstract
The aims of this study were to isolate spore-forming Bacillus strains that exhibit high digestibility and anti-pathogenic bacteria toward feed for calves. Total 136 spore-forming strains were isolated from finished feeds and their ingredients. Among them, 93 strains were identified as Bacillus species when analyzed by 16S rRNA sequencing. For industrial use, three strains named as Bacillus licheniformis SHS14, B. subtilis LCB7, B. amyloliquefaciens LCB10 were selected after evaluating the industrial standards that are related with heat and acid resistance, enzyme activities, and anti-pathogenic activities against Samonella dublin ATCC15480 and E. coli K99. After each culture, 3 selected strains were mixed together at 1:1:1 (v/v/v) ratio and then prepared as the mixed starter culture for feeding. The changes in microbial community were analyzed via 16S rRNA metagenomics. The initial community ratio among three strains was maintained even after manufacturing into final products. Also, in vitro, enzymatic and anti-pathogenic activities were almost same as those when cultured in single culture, and results of anti-pathogenic activities conducted with calves showed 90% activities against lincomycin, which would be indicative of a promising feed starter.
 Keywords
Bacillus;fermented feed;spore forming bacteria;starter culture;
 Language
Korean
 Cited by
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