MaterialsPharmaceutical-grade chitosan was purchased from ZhejiangFreeman Shinfuda Co., Ltd (Taizhou, China). The degree of deacety-lation was >90%, and the viscosity was ∼100 mPa/s. Glutaraldehyde(50%) was purchased from Laohekou Jinghong Chemical Co., Ltd(Hubei, China). Sodium dodecyl sulfate (SDS) was purchased fromYabang Chemical Group Co., Ltd (Shanghai, China). E. faecalis strainwas provided by Zhejiang Hisun Pharmaceutical Co. Ltd (Taizho