Viruses or extracellular vesicles were immunocaptured with 15 nm magnetic nanoparticles coupled to antibodies recognizing surface antigens. The captured virions or vesicles were labeled with fluorescent antibodies against other surface antigens. The resultant complexes were separated in high magnetic field and analyzed with conventional flow cytometers triggered on fluorescence.
Arakelyan, A., Fitzgerald, W., Zicari, S., Vagida, M., Grivel, J., Margolis, L. Flow Virometry to Analyze Antigenic Spectra of Virions and Extracellular Vesicles. J. Vis. Exp. (119), e55020, doi:10.3791/55020 (2017).