| 摘要 |
<p>Described herein are assay devices having a control surface (30) on which controls are deposited to produce a representational symbol which preferably indicates a satisfactory test procedure, or a failure in the test procedure. In one aspect of the invention, the symbol comprises exclusively the positive control areas (50, 52, 54) and the negative control area (60), so that the negative control area will convert the "satisfactory" symbolism into "unsatisfactory" symbolism. Symbols that can be used include those that are formed as "OK" and "OK", respectively. <IMAGE></p> |
