Patent ID: 8992854
Filing Date: 2015-03-31
Classification: G01N

Abstract:
1. An assay device for detecting an analyte in a liquid sample, the assay device comprising: a casing, the casing comprising at least one window; a labeling region, the labeling region comprising a mobilizable labeled binding agent; and a nitrocellulose strip located within the casing, the nitrocellulose strip being substantially opaque in a dry state and being translucent when wet by the liquid sample, the nitrocellulose strip comprising: (i) an analyte detection region comprising an immobilized binding agent which binds the analyte, the analyte detection region located downstream of the labeling region, wherein the analyte detection region is visible through the at least one window; (ii) a control region located downstream of the analyte detection region; wherein the control region is visible through the at least one window; and the casing comprising a colored plastic protuberance on an inner surface which presses against the nitrocellulose strip on the side of the nitrocellulose strip that is not visible through the at least one window when the nitrocellulose strip is in a dry state; wherein in use, the liquid sample contacts and migrates along the nitrocellulose strip, and wherein the protuberance is visible to a user through the at least one window when the nitrocellulose strip is wet.