Scanning electron microscopy photographs of scaffolds in MRSA suspensions after 2 weeks. (a) hASC-seeded control PLA (no silver) scaffolds, (b) hASC-seeded silver-releasing scaffolds, (c) acellular control PLA scaffolds (no hASC and no silver), and (d) acellular silver-releasing scaffolds. Solid arrows point to hASC and dashed arrows point to MRSA bacteria. Dense layer of MRSA bacteria, representing formation of biofilm, observed on both hASC-seeded and acellular PLA scaffolds, but not hASC-seeded or acellular silver- releasing scaffolds.