Phagocytic uptake of microparticles by neutrophils. Incubation of neutrophils with microparticles isolated from Stx2- or O157LPS-stimulated whole blood induced phagocytic uptake of the microparticles compared with microparticles isolated from unstimulated whole blood. Data are presented as the MFI ± SD from 5 independent experiments. Uptake of microparticles from Stx2- or O157LPS-stimulated whole blood was compared with that from unstimulated whole blood. **P < .01.