Figure 2.

Bile salts tolerance of L. lactis strains. Cell survival of L. lactis strains was assayed by plate counting after exposure to 0.1% and 0.3% (w/v) bile salts for 1.5, 3, and 6 h. Results were normalized against cell viability under control conditions (without bile salts) and expressed as percent of log CFU ml⁻¹.