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. 2016 Jun 10;7:863. doi: 10.3389/fmicb.2016.00863

FIGURE 4.

FIGURE 4

Biofilm formation of LAB using the microtiter plate assay. After incubation at 30°C for 48 h in MRS media. Data are mean ± standard deviations. The cut-off (ODC) was defined as the mean OD value of the negative control. Based on the OD, strains were classified as non-biofilm producers (OD ≤ ODC), weak (ODC < OD ≤ 2 × ODC), moderate (2 × ODC < OD 4 × ODC) or strong biofilm producers (4 × ODC < OD).

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