Fig. 2 DPCR detection of E. coli O157:H7 in milk. Escherichia coli O157:H7 (103 cells) was added to 50 ll skim milk. Serial dilutions were carried out in double distilled water to a theoretical concentration of 10)2 cells and each tube was used in PCR. (–) No DNA control.
M, molecular weight markers. Similar results were obtained with whole milk (not shown)