Rapid influenza diagnostic tests (RIDTs) utilize a lateral flow immunoassay to detect influenza viral antigens in respiratory specimens. These tests offer a visual readout, typically within 10-15 minutes, indicating the presence or absence of specific influenza types and subtypes. A colored line appearing in a designated test window signifies a positive result, while its absence suggests a negative result. A control line is also present to validate the test’s functionality.
Rapid results facilitate timely clinical decision-making, including treatment initiation, isolation protocols, and public health surveillance. This speed can reduce unnecessary antibiotic prescriptions, minimize the spread of infection, and aid in managing outbreaks. While these tests have become increasingly common due to their convenience, understanding their limitations, such as sensitivity and specificity variations compared to molecular assays, is crucial for appropriate interpretation and utilization. The development and refinement of RIDTs have played a significant role in improving influenza management strategies over the past few decades.
