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. 2020 Apr 6;9(4):442. doi: 10.3390/foods9040442

Figure 2.

Figure 2

Fluorescence microscopy images of surfaces stained with the Live/Dead® kit. Live cells in biofilms appeared green in color and dead or injured cell appeared red. (A) stainless steel (type 304 grade B finish); (B) polyester without biocide, forming biofilms of Listeria monocytogenes after 72 h of incubation in humid conditions; (C) polyester surface treated with 800 ppm Ag-NPs inoculated with Listeria monocytogenes after 72 h of incubation in humid conditions, not forming biofilms. All images at 40× magnification.