FIGURE 1.

Different concentrations of WPI in skim milk impacted on Lactobacillus casei BL23 and Propionibacterium freudenreichii 138 growth. (A) Colony-forming unit (CFU) counting of L. casei BL23, after 24 h of incubation at 37°C and (B) Population of P. freudenreichii 138, after 78 h of anaerobic incubation at 30°C were assessed by CFU counts. These assays were performed in triplicate technique and biological triplicate. Asterisks represent statistically significant differences and were indicated as follows: ^∗p < 0.05, ^∗∗p < 0.01, ^∗∗∗p < 0.001, ^∗∗∗∗p < 0.0001.