抗菌不锈钢的抗菌效果观察

为了解抗菌不锈钢的抗菌效果,采用抑菌试验方法和透射电镜进行了观察。结果,含有质量分数3.8%铜的不锈钢片抑菌环试验为0 mm;奎因试验有菌生长;24 h振荡烧瓶试验,金黄色葡萄球菌抑菌率为50.21%,大肠杆菌抑菌率为54.10%。薄膜附着法定量抑菌试验,金黄色葡萄球菌抑菌率为99.17%,大肠杆菌抑菌率为99.15%。电镜观察,经抗菌不锈钢作用后的金黄色葡萄球菌、大肠杆菌形态发生改变。结论,抗菌不锈钢是非溶出性抗菌材料,只有采用薄膜附着法定量抑菌试验才显示出明显的抑菌效果,其它试验方法均不显示出有效的抗菌作用。

OBSERVATION ON ANTIBACTERIAL EFFICACY OF ANTIBACTERIAL STAINLESS STEEL

In order to know the antibacterial efficacy of the antibacterial stainless steel,bacteriostasis test method and transmission electronmicroscopy were used to carry out observation.Results: The result of bacteriostasis ring test for the stainless steet coupon containing 3.8%(m/m) copper was 0 mm.In Quinn test,there was bacteria growth.In 24-h vibrating flask test,the bacteriostasis rates of Staphylococcus aureus and Escherichia coli were 50.21% and 54.10% respectively.In the thin-film adhering quantitative bacteriostasis test,the bacteriostasis rates of Staphylococcus aureus and E coli were 99.17% and 99.15% respectively.Electromicroscopic examination found morphological changes of S.aureus and E.coli exposed to the antibacterial stainless steel.Conclusion: The antibacterial stainless steel is an undissolving antibacterial material and only thin-film adhering quantitative bacteriostasis test can show its antibacterial efficacy,while all other tests can not show its antibacterial effect.