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Confocal microscopy image of C. acnes infected KB7007NP disc cells (arrows) [multiplicity of infection (MOI) 1:1000; 48 h, original multiplication x40] (A). Fluorescently labelled C. acnes (green) were visible as intracellular clusters, and individual bacteria within viable Calcein Red-Orange-stained disc cells derived from NP tissue (B).
