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A difference in (a) the number of E. coli bacteria per cm3 in LH broths; and (b) bacterial viability in the biofilm of P. aeruginosa following overnight incubation with pure HAP pastes, with pure antibiotics (ciprofloxacin or vancomycin) or with HAP pastes loaded with antibiotics. Data points significantly different from the untreated controls (E. coli, P. aeruginosa, p < 0.05) are topped with an asterisk (*).
