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Related Concept Videos

Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

176
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
176

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Updated: Aug 23, 2025

Prevention of Heat Stress Adverse Effects in Rats by Bacillus subtilis Strain
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Host-derived bacillus spp. as probiotic additives for improved growth performance in broilers.

Bei Wang1, Qiong Wu2, Shengzu Yu1

  • 1College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China.

Poultry Science
|November 5, 2022
PubMed
Summary
This summary is machine-generated.

Bacillus subtilis AH-G201 and Bacillus licheniformis AH-G202 were isolated from goslings and show potential as probiotics. These strains improved broiler growth performance and gut health, offering an alternative to antibiotics in animal feed.

Keywords:
Bacillusfeed additivesgrowth performanceprobioticsstrain screening

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Area of Science:

  • Animal Science
  • Microbiology
  • Veterinary Medicine

Background:

  • Antibiotic use in animal feed is increasingly restricted.
  • Probiotics are emerging as alternatives for maintaining animal health.
  • Gosling gut microbiota is a potential source for novel probiotic strains.

Purpose of the Study:

  • To screen and evaluate Bacillus strains from gosling gut for probiotic potential.
  • To assess the efficacy of selected probiotics in improving broiler growth and gut health.
  • To determine if these probiotics can serve as a viable alternative to antibiotics.

Main Methods:

  • Isolation and identification of Bacillus strains (B. subtilis, B. licheniformis, B. amyloliquefaciens) from healthy goslings.
  • In vitro testing for acid and bile salt tolerance, and inhibition of pathogenic bacteria (E. coli, Salmonella).
  • In vivo safety and growth performance studies in broilers, including analysis of immune organ index and fecal microbiota.

Main Results:

  • B. subtilis AH-G201 and B. licheniformis AH-G202 demonstrated significant gastrointestinal resistance and inhibited pathogenic E. coli and Salmonella.
  • These strains showed no adverse effects on broiler growth and improved overall performance.
  • Combined administration of AH-G201 and AH-G202 enhanced spleen weight and lactic acid bacteria counts in broilers.

Conclusions:

  • Bacillus subtilis AH-G201 and Bacillus licheniformis AH-G202 possess excellent probiotic properties.
  • These strains can effectively replace antibiotics, improving broiler growth performance and gut health.
  • The findings support the clinical application of these novel probiotics in poultry farming.