Patent ID: 8202734
Filing Date: 2012-06-19
Classification: B01L,G01N,Y10S,Y10T

Abstract:
1. A method for providing a test device for determining the presence or absence of an analyte in a fluid sample, comprising: providing a test strip comprising in fluid-flow contact with one another: a) a sample receiving zone for receiving a fluid sample at an upstream portion of the test strip; b) a label zone downstream of the sample receiving zone, said sample receiving zone comprising a label reagent that recognizes an analyte of interest; and c) a capture zone downstream of the label zone, said capture zone comprising an immobilized capture reagent that binds to the analyte, said capture zone comprising a material that is opaque in the dry state and becomes transparent when moistened by the fluid sample, and wherein said capture zone is visible during operation of the test device; and providing a second strip having a mark visible through the capture zone when moistened; and contacting the test strip and the second strip to form the test device.