Figure 2: Survival curve during in vitro digestion (TIM-1) of fermented milk with B. longum subsp. longum CUETM 172 (a), CUETM 247 (b), CUETM 245 (c), CUETM 268 (d), and PRO 16-10 (e). The cell concentrations were determined by viable counts in CFU/mL (solid line) and by PMA-qPCR in viable cells/mL (dashed line). Samples were taken in gastric (▲) and duodenal (■) compartments. Empty symbols indicate that only one value was obtained. The limit of detection of PMA-qPCR was 3.51 log of viable cells/mL. The error bars represent the standard deviation.