Patent ID: 7060505

Claim:
A method for detecting an analyte in a test sample provided by a test subject having an identifying body part surface and simultaneously establishing the identity of said test subject comprising: (a) providing a self-contained assay device having an identifying control zone, a test sample medium, a reaction medium containing a member of an immunological pair, and a signal-producing agent, wherein said test sample medium and said reaction medium are moveable between a first position in which the test sample medium and the reaction medium are in a spaced relationship and a second position in which the test sample medium and reaction medium are in sample-transferring contact and wherein said signal producing agent and said reaction medium are movable between a first position in which the signal producing agent and the reaction medium are in a spaced relationship and a second position in which the signal producing agent and the reaction medium are in signal producing agent-transferring contact and wherein both said test sample medium and said signal producing agent are in a spaced relationship to said reaction medium; (b) contacting said test sample with said test sample medium, wherein at least a portion of said test sample is transferred to said test sample medium; (c) moving said test sample medium to said second test sample-transferring contact position with said reaction medium, wherein at least a portion of said test sample is transferred from said test sample medium to said reaction medium and wherein any analyte present in said test sample forms a conjugate with the member of an immunological pair in said reaction medium; (d) moving said test sample medium to said first spaced relationship to said reaction medium; (e) moving said signal-producing agent to said second signal-producing agent-transferring contact position with said reaction medium, wherein at least a portion of said signal producing agent is transferred to said reaction medium and wherein said signal-producing agent binds to said reaction medium in the presence of conjugated analyte; and (f) determining the presence or absence of said analyte by detecting the presence or absence of bound signal-producing agent; said method further comprising (g) contacting said signal-producing agent with said identifying body part surface of said test subject wherein at least a portion of said signal-producing agent is transferred to said identifying body part surface; and (h) placing said identifying body part surface in signal-producing agent-transferring contact with said identifying control zone wherein at least a portion of said signal-producing agent is transferred to said identifying control zone such that an identifying imprint of said identifying body part surface is created on said identifying control zone to establish the identity of said test subject.