Abstract
Background: Probiotic products are matrices for delivery of beneficial live bacteria to the host. The viable bacteria are being incorporated into dairy products as well as supplements. Objectives: The aim of the present study was evaluation and validation of probiotic contents in commercial products to select the optimum matrix for protection of viability and functionality of probiotic bacteria. Materials and Methods: A total of forty six lactic acid bacteria were isolated from ten pharmaceutical and ten dairy products. Their probiotic properties such as acid, salt and bile tolerance, antibiotic susceptibility tests, adherence to cell line, stability under refrigeration conditions and antagonistic activity against nine bacterial strains were assayed. Results: Results showed that the viable bacterial count of solid products were lower than stated number on their package. No difference was noticed between strains isolated from dairy and non-dairy products regarding antibiotic susceptibility and adherence properties. Pharmaceutical isolates were more potent against pathogens than dairy isolates. Conclusions: In conclusion, dairy products are better matrices for delivering bifidobacteria than non-dairy products. But, probiotic isolates from non-dairy products, showed better properties such as pathogen exclusion than dairy isolates.
Highlights
Probiotic products are matrices for delivery of beneficial live bacteria to the host
The results of the present study were: the smaller numbers of microorganisms in the products especially bifidobacteria than what was stated by manufacture on the label, the higher number of viable bacteria in dairy products than pharmaceutical, possessing the important criteria for probiotic bacteria with the exception of adherence ability in which 30% of dairy isolates and 14% of pharmaceuticals were poorly adherent, the higher activity of pharmaceutical isolates against pathogen compared to dairy products and inhibitory effects of some probiotic bacteria against each other’s in multistrains products
The present study showed that some products contained fewer lactobacilli or bifidobacteria than claimed
Summary
Probiotic products are matrices for delivery of beneficial live bacteria to the host. Materials and Methods: A total of forty six lactic acid bacteria were isolated from ten pharmaceutical and ten dairy products. Their probiotic properties such as acid, salt and bile tolerance, antibiotic susceptibility tests, adherence to cell line, stability under refrigeration conditions and antagonistic activity against nine bacterial strains were assayed. No difference was noticed between strains isolated from dairy and non-dairy products regarding antibiotic susceptibility and adherence properties. Probiotic isolates from non-dairy products, showed better properties such as pathogen exclusion than dairy isolates. The ability of probiotic bacteria to adhere to intestinal cells or mucous is one of the main selection criteria, possessing ideal antibiotic resistance patterns and antagonistic activity against pathogenic microorganisms are important [7]
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