Combined visual/fluorescence analyte detection test
First Claim
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1. A method of running an assay on a sample, comprising the steps of:
- a) transferring the sample to a sample analysis device, wherein the sample analysis device comprises a plurality of labels visible to an unaided eye and a plurality of fluorescing elements, wherein the labels and the fluorescing elements are each coupled with at least one specific binding partner for a target in the sample; and
b) analyzing the sample for a presence of at least one target, comprising the substeps of,i) determining if a label is visible to the unaided eye at a test zone of the sample analysis device; and
ii) if a visibility of the label is indeterminate, casting a fluorescent light source on the test zone to determine whether a result is positive using fluorescence.
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Abstract
The sensitivity of visually read lateral flow immunoassay tests is enhanced by adding a small quantity of fluorescing dye or fluorescing latex bead conjugates to the initial conjugate material. When the visible spectrum test line is visibly present, the test result is observed and recorded. However, in the case where the result is indeterminate, a light of an appropriate spectrum, such as a UV, visible, or infrared spectrum, is cast on the test line to excite and fluoresce the fluorescing latex beads which are bound in the test line in true positive tests to enhance the visible color at the test line.
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Citations
19 Claims
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1. A method of running an assay on a sample, comprising the steps of:
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a) transferring the sample to a sample analysis device, wherein the sample analysis device comprises a plurality of labels visible to an unaided eye and a plurality of fluorescing elements, wherein the labels and the fluorescing elements are each coupled with at least one specific binding partner for a target in the sample; and b) analyzing the sample for a presence of at least one target, comprising the substeps of, i) determining if a label is visible to the unaided eye at a test zone of the sample analysis device; and ii) if a visibility of the label is indeterminate, casting a fluorescent light source on the test zone to determine whether a result is positive using fluorescence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification