A lateral flow assay that uses a visible line to indicate a result is commonly known as what?

A lateral flow assay that uses a visible line to indicate a result is commonly referred to as a strip test. This type of assay is characterized by its simplicity and rapidness, often allowing for quick results in various settings, including point-of-care testing. The visible line that appears is a direct result of the interaction between the sample and the reagents on the test strip, providing a clear indication of whether the target analyte is present or not.

The mechanism behind a strip test typically involves capillary action drawing the sample along the strip, where it encounters specific antibodies or antigens that are immobilized. If the target is present, a visible line will form at a designated control or test region on the strip, signifying a positive result. This immediate visual feedback is a significant advantage in many clinical and environmental testing situations, making it accessible and easy to interpret.

In comparison, while the terms "rapid test" and "flow-through assay" can also refer to tests that yield results quickly, they may not necessarily involve the visual line element specifically associated with traditional strip tests. A rapid test could refer to a broader category of tests that may not follow the lateral flow format, and flow-through assays often have different mechanisms for sample movement and detection. The term