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. 2022 Jan 24;11(2):147. doi: 10.3390/antibiotics11020147

Figure 2.

Figure 2

The effect of investigated substances on biofilm biomass reduction by: (a) reference strain—K. pneumoniae ATCC BAA-2473; (b) isolate no. 1; (c) isolate no. 2; and (d) isolate no. 3. Control—Mueller–Hinton broth (MHB); A—MHB supplemented with 1% (v/v) Tween 80; B—MHB supplemented with 2% (v/v) dimethyl sulfoxide (DMSO); C—MHB supplemented with subinhibitory concentration (MIC50) of linalool; D—MHB supplemented with MIC50 of β-citronellol; E—MHB supplemented with MIC50 of menthone; F—MHB supplemented with MIC50 of geraniol; G—MHB supplemented with MIC50 of eugenol; H—MHB supplemented with MIC50 of thymol; I—MHB supplemented with MIC50 of 1,8-cineole; J—MHB supplemented with MIC50 of carvacrol; K—MHB supplemented with MIC50 of gentamicin (positive control). The data are expressed as mean ± standard deviation (SD). Significant differences in biofilm biomass reduction after using different essential oil compounds and gentamicin were considered with the following values: * p < 0.05, *** p < 0.001, **** p < 0.0001.