TABLE 2.

Microbial growth of L. pneumophila L-1033 and L-1043 following exposure to levofloxacin, ciprofloxacin, azithromycin, erythromycin, and doxycycline at various concentrations^a

MIC multiple	Log10 CFU/ml at 3 h with:
	Levofloxacin	Ciprofloxacin	Azithromycin	Erythromycin	Doxycycline
L. pneumophila L-1033 (SD, 0.29 log10 CFU/ml)
0	7.24	7.37	7.59	7.22	7.07
1	6.74**	6.94**	7.23**	7.10	6.79
5	4.65**	5.19**	6.90**	6.98	6.67
10	4.06**	4.45**	6.87**	6.68	6.74
L. pneumophila L-1043 (SD, 0.18 log10 CFU/ml)
0	6.80	6.63	6.54	6.80	6.85
1	6.17**	6.74	6.32	6.68	6.68
5	3.94**	6.52	6.08**	6.64	6.35**
10	3.24**	6.18**	5.97**	6.61	6.41**

^aThree to five assays were performed for strain L-1033; two to three assays were performed for strain L-1043. Asterisks denote statistical difference from the control (0 times the MIC).

^**P < 0.01.