TABLE 3.

Recovery of viable Y. pestis Harbin in BHI at 55% RH as measured in number of CFU

Timea (h)	Mean log10 CFU/coupon (SD) (n = 3-9) for different materials
	Stainless steel	Polyethylene	Glass	Paper
0	5.81 (0.19)	5.73 (0.20)	5.83 (0.19)	5.78 (0.16)
24	3.30 (0.10)	2.36 (0.60)	2.37 (0.47)	2.74 (0.88)
48	2.17 (0.25)	1.37 (1.00)	1.19 (0.55)	2.70 (0.50)
72	1.42 (0.43)	0.74 (0.92)	0.35 (0.52)	2.06 (0.35)
96	0.00 (0.00)	0.00 (0.00)	0.00 (0.00)	0.57 (0.61)
120	0.00 (0.00)	0.00 (0.00)	0.00 (0.00)	0.09 (0.27)

^aTime since inoculation.