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Fig. 5 | Antimicrobial Resistance & Infection Control

Fig. 5

From: Assessment of the potential for resistance to antimicrobial violet-blue light in Staphylococcus aureus

Fig. 5

Comparison of MSSA susceptibility to high-intensity 405 nm light after cultivation in different lighting conditions. a Methicillin-sensitive Staphylococcus aureus (MSSA) was cultivated in low-intensity (1 mW/cm2) 405 nm light followed by cultivation in complete darkness, and b MSSA was subjected to repeated (three times) cultivation in low-intensity (1 mW/cm2) 405 nm light. Each cultivation was at 37 °C for 18 h. Following these cultivation conditions, bacteria were exposed to increasing doses of high-intensity 60 mW/cm2 light to establish the inactivation kinetics. Inactivation kinetics of bacteria which had been pre-cultured once in darkness or low-intensity 405 nm light are given as a comparison. * Indicates cultured samples that were significantly different to those which had been cultured once in 1 mW/cm2 405 nm light, using one way ANOVA with Dunnett’s post-hoc test (P < 0.05). Each data point is a mean value ± SD (n ≥ 6). No significant changes were observed in the final control populations (P ≥ 0.05)

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