Stenotrophomonas maltophilia bloodstream infection in patients with hematologic malignancies: a retrospective study and in vitro activities of antimicrobial combinations

Table 4 Comparison of fractional inhibitory concentration ranges for each antimicrobial combination

Antimicrobial combination	ΣFIC^a			Synergy (%)	Indifference (%)	Antagonism (%)
Antimicrobial combination	50%	90%	Range	Synergy (%)	Indifference (%)	Antagonism (%)
SXT plus TIM	0.500	0.750	0.254 to 1.500	60	40	0
SXT plus LVX	0.625	1.000	0.500 to 1.000	40	60	0
SXT plus MXF	0.625	0.625	0.313 to 0.750	40	60	0

Abbreviations: FIC, fractional inhibitory concentration; LVX, levofloxacin; MXF, moxifloxacin; SXT, trimethoprim-sulfamethoxazole; TIM, ticarcillin-clavulanic acid.
^a50% and 90%, ΣFIC for 50% and 90% of the isolates, respectively.

ISSN: 1471-2334