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Title of Journal: Appl Microbiol Biotechnol

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Abbravation: Applied Microbiology and Biotechnology

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Springer Berlin Heidelberg

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DOI

10.1002/sca.4950230301

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ISSN

1432-0614

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Characterization of Emphasis Type="Italic"Bacill

Authors: Nadja Larsen Line Thorsen Elmer Nayra Kpikpi Birgitte StuerLauridsen Mette Dines Cantor Bea Nielsen Elke Brockmann Patrick M F Derkx Lene Jespersen
Publish Date: 2013/11/08
Volume: 98, Issue: 3, Pages: 1105-1118
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Abstract

Bacillus spp are commonly used as probiotic species in the feed industry however their benefits need to be confirmed This study describes a high throughput screening combined with the detailed characterization of endosporeforming bacteria with the aim to identify new Bacillus spp strains for use as probiotic additives in pig feed A total of 245 bacterial isolates derived from African fermented food feces and soil were identified by 16S rRNA gene sequencing and screened for antimicrobial activity and growth in the presence of antibiotics bile salts and at pH 40 Thirtythree Bacillus spp isolates with the best characteristics were identified by gyrB and rpoB gene sequencing as B amyloliquefaciens subsp plantarum B amyloliquefaciens subsp amyloliquefaciens B subtilis subsp subtilis B licheniformis B mojavensis B pumilus and B megaterium These isolates were further investigated for their activity against the pathogenic bacteria antibiotic susceptibility sporulation rates biofilm formation and production of glycosyl hydrolytic enzymes Additionally ten selected isolates were assessed for heat resistance of spores and the effect on porcine epithelial cells IPECJ2 Isolates of B amyloliquefaciens B subtilis and B mojavensis showed the best overall characteristics and therefore potential for usage as probiotic additives in feed A large number of taxonomically diverse strains made it possible to reveal species and subspeciesspecific trends contributing to our understanding of the probiotic potential of Bacillus speciesThis work was financially supported by Chr Hansen A/S Denmark and the Danish International Development Agency DANIDA Seedfood project The excellent assistance of laboratory technicians Abdallah Albayasli Nina Milora and Jonna Nielsen Chr Hansen A/S is gratefully acknowledged Thanks to Animal Health and Veterinary Laboratory Agencies AHVLA UK as well as Royal Holloway University of London for supplying selected Bacillus strains

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