TABLE 2.

Decrease in OD and CFU after vancomycin treatment for 4 h

Strain	Growth conditiona	Doubling time (min)	Percent loss of OD620	Log decrease in CFU/ml ± SDb
T4		50	70	1.9 ± 0.6
T4R		35	96	6.2 ± 0.5
R6		46	95	2.7 ± 0.4
Tupelo		49	4	0.4 ± 0.1
HS2155		44	86	1.1 ± 0.1
HS2155	+ Erm	74	60	0.6 ± 0.2
HS1937		50	18	0.4 ± 0.1
HS1937	+ Erm	123	−6	−0.1 ± 0.1
HR1937		51	7	0.4 ± 0.1
HS0601		46	67	0.8 ± 0.1
HS0601	+ Erm	62	46	0.9 ± 0.2
HR0601		51	37	0.4 ± 0.1
HS0602		44	89	2.6 ± 0.1
HS0602	+ Erm	69	78	1.2 ± 0.1
HS0603		45	78	2.0 ± 0.4
HS0603	+ Erm	68	77	1.3 ± 0.2
HS0604		44	84	2.6 ± 0.2
HS0604	+ Erm	76	74	1.8 ± 0.1
HR0604		43	79	2.0 ± 0.2

^a+ Erm, grown in the presence of erythromycin.

^bAt 4 h. Mean values for three independent experiments are shown.