Table 10.

Ciprofloxacin inhibition zone diameters of Y. pestis-positive blood cultures.

	Inhibition Zone Diameter (mm)
Incubation Duration (h)	Standard Conditions a	At the Alert	18 h after the Alert, Incubation in the Device	3 h after the Alert, at Room Temperature
18	35–40	35–40	37–39	40–42
20	36–40	36–40	37–42	38–42
22	39–41	36–42	37–42	42
24	39–42	42	37–43	43–45

^a Ciprofloxacin inhibition zone diameter for the standard culture were taken from Table 7; the diameters were determined by at least three independent assays.