Inventors:
Jeremy Jerome - Carlsbad CA, US
Mark Daquipa - San Diego CA, US
Bruce Jacono - Ramona CA, US
Hans Boehringer - San Diego CA, US
Paul Lambotte - San Diego CA, US
Paul J. Lawrence - Pacific Grove CA, US
Assignee:
Quidel Corporation - San Diego CA
International Classification:
G01N 33/53
US Classification:
436518, 436514, 436169, 436172, 436175, 436530, 436533, 436807, 436170, 436823, 435823, 4352878, 4352879, 435805, 422 57, 422 58, 422 59, 422 60, 422 61
Abstract:
A test device and method for determining the presence or absence of one or more analytes in a fluid sample, the test device including a support or member bearing a mark thereon, and a matrix or member containing a capture zone. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (−) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (−) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.