Patent ID: 7238537

Claim:
An immunoassay test device, comprising: a test strip comprising: a porous sample receiving member, configured to receive a liquid sample, a macroporous body, a porous carrier comprising a detection zone, a first binding reagent for binding an analyte, the first binding reagent is immobilized in the detection zone, a labeled binding reagent comprising a particulate label portion and a binding portion for binding the analyte, the labeled binding reagent is disposed in the macroporous body in a dry state and is mobilizable by liquid that passes along a flow path, and the labeled binding reagent and the first binding reagent are configured to bind the analyte and to form an immobilized and directly-detectable product in the detection zone, if the analyte is present in liquid received by the sample receiving member; wherein, the test strip defines a flow path along which liquid received by the sample receiving member can pass to the macroporous body and thereafter to the porous carrier.