Figure 1

SEM microphotographs of blank chitosan microparticles (CHI MPs), CHI MPs modified with N-acetyl-d-glucosamine (CHI-GlcNAc MPs), and CHI MPs modified with Pluronic F-127 (CHI-Pluronic MPs) (A) and of CHI-BCG, CHI-GlcNAc-BCG, and CHI-Pluronic-BCG MPs (B).