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Antimicrobial potential of commercial silver nanoparticles and the characterization of their physical properties toward probiotic bacteria isolated from fermented milk products.

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    • Abstract:
      The application of nanotechnology in the agriculture and food sector is relatively recent compared to its usage in drug delivery or pharmaceuticals. Therefore, this paper presents a study of the effect of silver nanoparticles on probiotic bacteria based on the example ofLactobacillus acidophilusLA-5, Bifidobacterium animalissubsp.lactisBB-12 andStreptococcus thermophilusST-Y31 isolated from fermented milk products. Probiotic bacteria are one of the most crucial groups of bacteria for the food industry, because of their claimed health-promoting properties. Studies have shown that the type and concentration of silver nanoparticle solutions have a significant impact on the tested probiotic bacteria which are profitable for the digestive system. In the presence of all tested silver nanoparticles,St. thermophilusST-Y31 growth was inhibited significantly by the dilution method as opposed to the disk-diffusion method. Both the disk-diffusion and the dilution methods showed no significant differences betweenL. acidophilusLA-5 andB. animalissubsp.lactisBB-12. The concentrations 2 μg mL−1and 0.25 μg mL−1had the highest antibacterial activity and statistically significant impacts on the tested probiotic strains. To our knowledge, this is the first report on potential antimicrobial effect of nanosilver against the health-promoting probiotic bacteriaL. acidophilusLA-5,B. animalissubsp.lactisBB-12 andSt. thermophilusST-Y31 isolated from fermented milk products. [ABSTRACT FROM PUBLISHER]
    • Abstract:
      Copyright of Journal of Environmental Science & Health. Part B. Pesticides, Food Contaminants & Agricultural Wastes is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)