Characterization of the antifungal activity of Lactobacillus harbinensis
K.V9.3.1Np and Lactobacillus rhamnosus K.C8.3.1I in yogurt
antifungal stability during storage and its impact on yogurt organoleptic properties. We showed that
L. harbinensis K.V9.3.1Np maintained a stable antifungal activity over time, which was not affected by
initial sucrose, nor by a reduction of the fermentation time. This inhibitory activity was an all-or-nothing
phenomenon. Once L. harbinensis K.V9.3.1Np reached a population of w2.5 106 cfu/g of yogurt at the
time of contamination, total inhibition of the yeast was achieved. We also showed that an inoculation
rate of 5 106 cfu/ml in milk had no detrimental effect on yogurt organoleptic properties. In conclusion,
L. harbinensis K.V9.3.1Np is a promising antifungal bioprotective strain for yogurt preservation.