Table 2.

Changes in antibiotic susceptibility profile following 24 h exposure to BZC, TRI or HB at 20 °C (±1 °C). Exposure concentrations for each biocide/bacteria combination are given in Table 1. Where the antibiotic is named, a change to that antibiotic susceptibility profile was measured (S: sensitive and I: intermediate) according to BSAC breakpoints [19]

Bacteria	Change in antibiotic susceptibility profile after 24 h exposure to
	BZC	TRI	HEPB
E. coli	GEN (S)	GEN (S); TOB (I)	GEN (S)
P. aeruginosa	CIP (S)	CIP (S)	–
S. aureus	–	–	–

–, no change in susceptibility; AMP, ampicillin; BZC, Benzalkonium chloride; CIP, ciprofloxacin; GEN, gentamicin; HEPB, HydroxyEthoxy Phenyl Butanone; (I), becoming clinically intermediate; (S), becoming clinically susceptible; TIM, ticarcillin/clavulanic acid; TOB, tobramycin; TRI, triclosan.