Inhibitory effect of some probiotic strains and essential oils on the growth of some foodborne pathogens.

BACKGROUND

and are implicated in foodborne diseases that have major effects on human health; therefore, it is considered universal public health disorders. Essential oils and essential oils nano emulsions have a sufficient antibacterial performance against a variety of bacteria, especially multi-drug resistant bacteria. Probiotics showed several health benefits via moderating the GIT microbiota and their metabolites.

AIM

The study was designed to evaluate the biocontrol ability of cinnamon essential oil (CEO) nano emulsion and probiotics as natural antibacterial additives and reveal their bactericidal mechanism.

METHODS

250 random samples (50 raw milk, 50 rice pudding, 50 kariesh cheese, 50 yogurt, and 50 ice cream) were purchased separately from different areas in Mansoura city, Egypt, and exposed to bacteriological analysis.

RESULTS

was found with the highest mean value of 66 × 10 ± 1.3 × 10 CFU/g in raw milk and the lowest mean value of 28 × 10 ± 2.6 × 10 CFU/g in kariesh cheese while was found in 64% of the total inspected samples with the highest incidence (84%) in yogurt. The toxinogenic potential of the tested pathogens has been evaluated by multiplex PCR pointing and genes for isolates while targeting in , and gene. Different concentrations (0.17%, 0.25%, 0.5%, 0.8%, 1%, 1.5%, and 2%) of cinnamon oil nano emulsion were employed in this study. CEO nano emulsion had the highest reduction rate at a concentration of 1.5% in the case of and 2% in the case of . Among different types of probiotics, the best one which showed inhibitory potential against and was

CONCLUSION

and CEO nano emulsion at a concentration of 2% have the highest reduction rate against , while and CEO nano emulsion at a concentration of 1.5% has the best antibacterial effect against . In conclusion, more attention is required for both safety and quality in dairy products through the application of natural additives such as essential oils and probiotics.