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Vaghasiya et al.33 formulated drug-free alginate-based microparticles (MPs) for E. coli infections. (A) Schematic portraying alginate MP fabrication by spray congealing. (B) Scanning electron micrographs of the alginate MPs. Drug-free alginate MPs induce (C) reactive oxygen species (ROS) and (D) nitrite production in E. coli infected macrophages.33
