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Comparison of a Qdot 655 version of the EcO 3R/4F aptamer test strip with the conventional colloidal gold version of the same strip at the colloidal gold LOD of ~300 E. coli 8739 cell per test showing at least 10 times greater sensitivity with Qdots and a handheld long wave UV light and visual detection versus colloidal gold. The capture (test or T) line or dot is clearly visible with Qdots, but not with colloidal gold at this low level of bacteria (300 cfu or viable cells).
