TABLE 4.

Detection of artificially contaminated pork by multiplex PCR.

Initial inoculum	Multiplex PCR results of
(CFU/10 g)	different enrichment time
	4 h	6 h	8 h	10 h	12 h
1.8 × 104	−	+	+	+	+
1.8 × 103	−	+	+	+	+
1.8 × 102	−	−	+	+	+
1.8 × 101	−	−	−	+	+
1.8 × 100	−	−	−	−	+
0	−	−	−	−	−

+, positive PCR result; −, negative PCR result.