TABLE 4.

Bacterial susceptibility toward didecyldimethyl ammonium chloride in planktonic and biofilm growth modes before, during, and after repeated exposure to didecyldimethyl ammonium chloride in aqueous solution or in formulation^a

Bacterium	Concn (mg/liter)
	MIC						MBC						MBEC
	UF			F			UF			F			UF			F
	P0	P14	X14	P0	P14	X14	P0	P14	X14	P0	P14	X14	P0	P14	X14	P0	P14	X14
S. aureus†	0.5	1.0	1.0	0.5	0.5	0.5	2.0	3.9	3.9	2.0	0.5	0.5	3.9	31.3	31.3	3.9	62.5	62.5
E. coli†	7.8	11.7 (4)	7.8	3.9	7.8	3.9	3.9	11.7 (4)	15.6	3.9	7.8	3.9	31.3	125	15.6	7.8	36.5 (13)	15.6
E. faecalis†	1.0	2.0	2.0	2.0	2.0	2.0	1.0	2.0	2.0	2.0	3.9	3.9	2.0	125	31.3	2.0	104.2 (32)	62.5
P. aeruginosa†	14.3 (2)	31.3	15.6	15.6	31.3	15.6	31.3	125	31.3	31.3	125	31.3	125	125	250	62.5	125	62.5
M. osloensis*	1.0	1.0	1.0	1.0	1.0	NA	1.4 (0.5)	3.9	2.0	2.0	2	NA	2.0	3.9	3.9	2.0	2.0	NA
A. baumannii*	15.6	31.3	15.6	3.9	7.8	NA	15.6	62.5	31.3	62.5	62.5	NA	62.5	125	31.3	62.5	62.5	NA
P. putida*	47.4 (17)	31.3	NA	4.6(1)	3.9	NA	62.5	41.7 (17)	NA	31.3	62.5	NA	62.5	62.5	NA	62.5	62.5	NA
C. sakazakii*	7.2 (2)	15.6	15.6	7.8	15.6	NA	15.6	31.3	31.3	7.8	15.6	NA	31.3	62.5	62.5	15.6	31.3	NA
E. coli*	4.6 (2)	15.6	15.6	3.9	7.8	3.9	10.4 (4)	41.7 (17)	31.3	3.9	15.6	7.8	15.6	62.5	31.3	15.6	62.5	23.5 (9)

^aSee footnote in Table 1.