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. 2014 Apr 10;3(2):341–355. doi: 10.3390/pathogens3020341

Figure 4.

Figure 4

Representative results of several sensitivity tests using live E. coli cells demonstrates a limit of detection (LOD) of ≤ 3,000 cfu for the 8739 strain and ≤ 6,000 colony forming units (cfu) for E. coli O157:H7 using visual detection of colloidal gold.