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Selection of lactobacilli for chicken probiotic adjuncts
M Garriga1, M Pascual, J M Monfort
1IRTA, Meat Technology Center-CeRTA, Granja Camps i Armet, Monells, Spain. Garriga@monells.irta.es
Journal of Applied Microbiology
|July 13, 2004
Summary
Lactobacillus salivarius strains inhibit enteric pathogens in chicks. Strain CTC2197 colonizes the gut, outcompeting other bacteria and establishing a dominant presence in the chicken gastro-intestinal tract.
Area of Science:
- Animal Science
- Microbiology
- Food Science
Background:
- Lactic acid bacteria (LAB) are crucial for gut health.
- Enteric pathogens like Salmonella and E. coli cause significant issues in poultry.
- Probiotics can offer a natural defense against these pathogens.
Purpose of the Study:
- To screen LAB from chicken gastro-intestinal tracts for inhibitory properties.
- To select Lactobacillus salivarius strains with high efficacy against enteric pathogens.
- To evaluate the colonization and competitive potential of selected strains in vivo.
Main Methods:
- Screening of 296 LAB strains for inhibition against Salmonella enteritidis and Escherichia coli.
- Selection of Lactobacillus salivarius strains based on inhibition, adhesion, and resistance.
- Assessment of strain competitiveness in chicken feed and in vivo chicken models.
Main Results:
- 77 out of 296 LAB strains inhibited enteric indicator strains.
- Eight Lactobacillus salivarius strains demonstrated broad-spectrum inhibition and high adhesion.
- Lactobacillus salivarius CTC2197 showed superior colonization and competitive ability in vivo, dominating the gut flora.
Conclusions:
- Lactobacillus salivarius strains possess significant potential as probiotics for poultry.
- Strain CTC2197 is a promising candidate for controlling enteric pathogens in chickens.
- Probiotic administration can modulate the indigenous gut microbiota and enhance gut health in poultry.