AI Article Synopsis

  • - The study examines the genome and characteristics of Bacillus velezensis ZBG17, which has a 3.89 Mbp genome and shows resistance to gut conditions, indicating its potential as a beneficial bacteria in poultry.
  • - ZBG17 demonstrated strong antibacterial properties, effectively inhibiting Salmonella enterica and Escherichia coli in laboratory tests, which suggests it might help improve chicken health by preventing bacterial infections.
  • - When added to chicken diets, ZBG17 improved feed efficiency and immune responses without any safety concerns, highlighting its potential as a safe alternative to antibiotic growth promoters in poultry farming.

Article Abstract

The present study describes genome annotation and phenotypic characterization of Bacillus velezensis ZBG17 and evaluation of its performance as antibiotic growth promoter substitute in broiler chickens. ZBG17 comprises 3.89 Mbp genome with GC content of 46.5%. ZBG17 could tolerate simulated gastrointestinal juices prevalent in the animal gut. Some adhesion-associated genomic features of ZBG17 supported the experimentally determined cell surface hydrophobicity and cell aggregation results. ZBG17 encoded multiple secondary metabolite gene clusters correlating with its broad-spectrum antibacterial activity. Interestingly, ZBG17 completely inhibited Salmonella enterica and Escherichia coli within 6 h and 8 h in liquid co-culture assay, respectively. ZBG17 genome analysis did not reveal any genetic determinant associated with reported safety hazards for use as a poultry direct-fed microbial. Dietary supplementation of ZBG17 significantly improved feed utilization efficiency and humoral immune response in broiler chickens, suggesting its prospective application as a direct-fed microbial in broiler chickens.

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Source
http://dx.doi.org/10.1016/j.ygeno.2021.10.012DOI Listing

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