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(a) Sample 45 identifies a small reduction in S. aureus. This is countered by a concomitant increase in other microorganisms allowing an increase in community diversity, but not overall microbial load. (b) This lack of action is also identified through FISH. Red colour represents a universal probe (Fluor 488) and the green represents a species-specific probe for S. aureus (Cy3). Some reduction in S. aureus aggregates post-treatment is noted, but the biofilm remains in bulk.
