Table 2.

Sensitivity comparison of the real-time RT-PCR and post-PCR colorimetric assays.

Dilution Factor	Resultsa
	Real time RT-PCR (Ct value)			Past-PCR colorimetric method
	No. 1	No. 2	No. 3	No. 1	No. 2	No. 3
1	21.24	23.76	23.98	+	+	+
10	23.96	26.44	27.33	+	+	+
100	26.85	30.06	31.17	+	+	+
1000	28.31	33.07	33.97	+	+	+
10,000	33.12	36.86	37.60	+	+	+
100,000	37.21	NAb	NA	+	+	+

^aPositive and negative results are indicated by "+" and "−".

^bNA, Not Applicable.