Screening of Bacterial Isolates with Probiotic Potential of Tiger Nut Drink, Ogi and Palm Wine
Journal of Applied Life Sciences International,
Probiotics are live microorganisms that are very beneficial to human health when consumed in a sufficient amount. Screening and fingerprinting of isolates with probiotic potentials from indigenous food products were evaluated. Fresh palm wine, Ogi and Tiger nut drinks were bought from retailers in Obio-Akpor and Port Harcourt Local Government Area, Rivers State. These samples on getting to the lab in sterile containers were analysed using standard microbiological techniques for the enumeration and isolation of bacterial isolates. Identification of isolates relied on the biochemical and genomic techniques using standard methods. The probiotics were screened based on their ability to tolerate ethanol, bile salt, low pH, high salt concentration, lactose utilization and the production of biogenic amine. Antimicrobial susceptibility of the bacterial isolates (probiotics) was carried out using the Kirby-Bauer disc diffusion. Forty-two bacterial isolates which belonged to the genera: Lactobacillus sp, Pediococcus sp, Enterococcus sp and Streptococcus sp were identified. Genomic characterization of isolates showed that isolate NO2 has 83.4% pairwise identity with Bacillus firmus strain T1, Isolate NP2 has 86.5% pairwise identity with Bacillus cereus strain PKID1, NT8 has 80.3% pairwise identity with Bacillus cereus strain PV-G21. Results of screened probiotics showed that out of the forty-two bacterial isolates, only fifteen were non-spore producers and that they were tolerant to ethanol, low pH, NaCl and bile salt at all concentrations. Results of lactose utilization showed that only twelve out of the fifteen bacterial isolates utilized lactose. Results of biogenic amine production showed that only five out of fifteen bacterial isolates produced biogenic amine. The antibiotic susceptibility pattern of the screened bacterial isolates showed that they exhibited resistance to Pefloxacin, Gentamycin, Ampiclox, Amoxicillin, Rocephin, Ciprofloxacin; Streptomycin, Sceptrin and Erythromycin. They were highly resistant to Gentamycin and Zinnacef. Bacillus firmus strain T1, Bacillus cereus strain PKID1 and Bacillus cereus strain PV-G21 were identified as bacterial probiotics. Consumption of palm wine, Ogi and tiger nut drinks is highly recommended due to the availability of probiotics.
- bacterial Isolates
- palm wine
- antibiotic susceptibility
How to Cite
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