Zika virus is transmitted through the bite of an infected Aedes species mosquito (Ae. aegypti and Ae. albopictus). These are the same mosquitoes that spread dengue and chikungunya viruses.
Zika Virus antibody tests are used to detect Zika from serum or cerebrospinal fluid; however, Zika IgM assays are prone to false-positive results because of cross-reacting IgM antibodies against related flaviviruses. As per the CDC's "Interim Guidance for Interpretation of Zika Virus Antibody Test Results" (June 2016), Zika Virus antibody test results can be difficult to interpret because of cross-reactivity, especially if the person was previously infected with or vaccinated against a related Flavivirus.
> CDC’s Guidance to Zika Virus Testing
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