| Evaluation of Bacillus species as potential candidates for direct-fed microbials in commercial poultry. | |
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MedLine Citation:
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PMID: 21673174 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Increasing sociopolitical concerns with antibiotic use have led to investigations of potential alternatives for food safety and growth promotion. Direct-fed microbials (DFM) including spore-based probiotics are amenable to feed inclusion and are extremely stable. We isolated several Bacillus spp. from environmental and poultry sources and tested them for their ability to reduce Salmonella in vitro. In a preliminary in vivo trial, day-of-hatch chicks and poults were randomly assigned to the following treatments (24 birds/treatment): control and one of 8 DFM candidates at 10(6) spores/g of feed. Chicks and poults were tagged, weighed, and orally challenged with Salmonella Typhimurium (ST). Body weight gain and ST recovery were measured 11 d posthatch. Total percentages of ST-positive crop and ceca were significantly lower (P < 0.05) in at least 3 DFM candidates compared with control. Additionally, beneficial effects on BW gain were observed in at least 5 DFM candidates (P < 0.05) compared with control. In a second study, birds treated with NP122 (identified as Bacillus subtilis) had significantly lower (P < 0.05) cecal ST than control and benefitted BW gain irrespective of the presence or absence of a Salmonella challenge. In conclusion, NP122 markedly reduced ST recovery and increased BW gain in both chicks and poults. This provides preliminary evidence that this isolate may have potential use as a DFM in poultry. |
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Authors:
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S Shivaramaiah; N R Pumford; M J Morgan; R E Wolfenden; A D Wolfenden; A Torres-Rodríguez; B M Hargis; G Téllez |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Poultry science Volume: 90 ISSN: 0032-5791 ISO Abbreviation: Poult. Sci. Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401150 Medline TA: Poult Sci Country: United States |
Other Details:
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Languages: eng Pagination: 1574-80 Citation Subset: IM |
Affiliation:
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Department of Poultry Science, University of Arkansas, Fayetteville 72701. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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