Pseudomonas aeruginosa cells growing on a surface as a biofilm.

Bacteria growing on a surface as a biofilm. Pseudomonas aeruginosa cells growing on a surface as a biofilm.Pseudomonas aeruginosa cells growing on a surface as a biofilm. The DNA of living bacteria is stained with a green fluorescent dye, while the DNA of impaired cells is stained with a red fluorescent dye. Source: Odel Soren, University of Southampton

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