TABLE 6.

Concentration of biocide producing a 3-log₁₀ reduction for eight isolates of UPEC determined by quantitative suspension test and the resulting BI^a

Biocide	EC1		EC2		EC11		EC26		EC28		EC34		EC958		CFT073
	rf (mg/liter)	BI	rf (mg/liter)	BI	rf (mg/liter)	BI	rf (mg/liter)	BI	rf (mg/liter)	BI	rf (mg/liter)	BI	rf (mg/liter)	BI	rf (mg/liter)	BI
PHMB	0.02	1.6	0.06	0.4	0.01	1.6	0.02	1.6	0.3	0.1	0.1	0.2	0.5	0.05	0.02	1.6
Triclosan	0.2	0.7	1.1	0.1	0.2	0.7	1.1	0.1	NC	NC	0.6	0.3	2.3	0.07	NC	NC
BAC	0.07	0.7	0.2	0.2	0.2	0.2	0.2	0.2	0.1	0.3	0.2	0.2	0.6	0.08	0.07	0.7
Silver nitrate	NC	NC	NC	NC	NC	NC	NC	NC	NC	NC	NC	NC	NC	NC	0.01	0.2

^aData show the concentration of biocide producing a 3-log₁₀ reduction (rf) after 30 min of exposure at 37°C for eight isolates of UPEC and the resulting BI value. NC, not calculable because for certain combinations of biocide and bacterial isolate, the rf value exceeded the maximum solubility of the biocide. The data represent the mean rf values taken from two separate experiments each with four technical replicates.