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Evaluation of enterococci for potential probiotic utilization in dogs.
Ivana Kubašová1, Andrea Lauková1, Ľudmila Hamarová1
1Centre of Biosciences Slovak Academy of Sciences, Institute of Animal Physiology, Šoltésovej 4-6, 040 01, Košice, Slovakia.
Folia Microbiologica
|August 19, 2018
Summary
Two Enterococcus faecium strains (IK25 and D7) show probiotic potential for dogs, demonstrating antimicrobial activity and survival in simulated gastric and bile conditions. These candidates may expand beneficial bacteria options for canine dietary supplements.
Area of Science:
- Microbiology
- Animal Science
- Probiotics
Background:
- Enterococcus strains can serve as effective probiotics in dogs if they meet specific safety and functional criteria.
- A limited range of beneficial bacteria of canine origin is currently available as dietary supplements.
Purpose of the Study:
- To screen 17 canine Enterococcus strains for probiotic properties, including safety, functional characteristics, and antimicrobial activity.
- To identify potential probiotic candidates for canine dietary supplements.
Main Methods:
- Antimicrobial resistance testing and PCR for specific resistance genes (vanA, vanB, vanC, tetM, tetL, ermB, mefA).
- Screening for enzyme production (β-glucosidase, α-chymotrypsin, N-acetyl-β-glucosaminidase, β-glucuronidase).
- Assessing strain survival rates under simulated gastric (pH 2.5) and bile conditions, L-lactic acid production, carbohydrate fermentation, and antimicrobial activity.
Main Results:
- Eleven strains were sensitive to EFSA-recommended antimicrobials; common resistances included cefotaxim and oxacillin.
- The mefA gene was found in five E. faecium strains, and the vanA gene in one strain.
- Two E. faecium strains (IK25 and D7) exhibited significant survival in bile, produced L-lactic acid, fermented various carbohydrates, and displayed antimicrobial activity against Listeria sp. and Enterococcus sp.
Conclusions:
- Two E. faecium strains, IK25 and D7, demonstrated promising probiotic characteristics, including safety and functional properties.
- These selected strains are suitable for further testing in dogs as potential dietary supplements.
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