TABLE 1.

Results of real-time PCR versus those of culture

Sample no.	Cta	PCR resultb	Culture resultc	% Cultivatable
1	25.1	5.5 × 107	4.5 × 106	8.2
2	31.7	6.5 × 105	1.9 × 104	2.9
3	32.2	4.8 × 105	1.0 × 103	0.2
4	34.4	1.1 × 105	2.0 × 103	1.8
5	23.2	1.9 × 108	5.4 × 105	0.3
6	30.5	1.5 × 106	9.0 × 103	0.6
7	28.6	5.3 × 106	2.8 × 104	0.5
8	35.5	5.3 × 104	0	0
9	31.4	7.8 × 105	3.1 × 105	40
10	35.0	7.5 × 104	0	0
11	26.1	2.8 × 107	3.6 × 105	1.3
12	22.7	2.8 × 108	6.8 × 106	2.4

^aC_t values were used for calculation of CFU equivalent.

^bCFU equivalent based on real-time PCR.

^cCFU of E. coli.