Can a dengue test detect other flaviviruses?

The Dengue ELISA test is designed to detect dengue-specific antibodies or antigens; however, there can be cross-reactivity with other flaviviruses such as Zika, West Nile, and yellow fever. This means that antibodies produced in response to one flavivirus infection can sometimes be detected by the test designed for another flavivirus, leading to false-positive results. To confirm a dengue diagnosis, especially in areas where multiple flaviviruses are prevalent, additional tests such as PCR or virus isolation may be needed to differentiate between the infections. It is important for healthcare providers to consider the patient's travel history, symptoms, and potential exposures when interpreting the results.