Bacteriocin-producing lactic acid bacteria as a probiotic potential from Thai indigenous chickens

H. Musikasang, N. Sohsomboon, Akio Tani, S. Maneerat

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    Bacteriocin-producing lactic acid bacteria (LAB) were isolated and screened from the gastrointestinal tract (GIT) of Thai indigenous chickens. The bacteriocinogenic activities and the primary probiotic properties were determined. The bacteriocins produced by 14 strains of selected LAB displayed inhibitory activity against indicator strains after the supernatants were neutralized with NaOH in the following species: Lactobacillus sakei subsp. sakei JCM1157, Enterococcus faecalis VanB, Bacillus sp., and Listeria monocytogenes. The antagonistic activity of selected LAB was inactivated or decreased after being treated with proteolytic enzymes (?-chymotrypsin and trypsin). CR5-1 strain exhibited the highest level of activity (5120 AU/ml) in the stationary phase againstL. sakei subsp. sakei JCM1157 in MRS broth at 37°C. The nine isolates of selected LAB were investigated for primary probiotic properties. The survival of the nine isolates was found to decrease approximately by 3 log CFU/ml after passing through the gastrointestinal conditions. All isolates exhibited protein digestion on agar plates but no isolates showed the ability to digest starch and lipid. Most of them showed high susceptibilities to some antibiotics (penicillin G, tetracycline and erythromycin). Thirteen LAB strains producing bacteriocin with strongly inhibitory activity were identified as Lactobacillus salivarius and only one strain was identified by 16S rDNA sequence analysis as Lactobacillus agilis.

    Original languageEnglish
    Pages (from-to)137-149
    Number of pages13
    JournalCzech Journal of Animal Science
    Volume57
    Issue number3
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Antibiotic susceptibility
    • Gastrointestinal tract
    • Poultry
    • Probiotic

    ASJC Scopus subject areas

    • Animal Science and Zoology

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