文档介绍：该【52细菌的感染与免疫 】是由【小可爱】上传分享，文档一共【51】页，该文档可以免费在线阅读，需要了解更多关于【52细菌的感染与免疫 】的内容，可以使用淘豆网的站内搜索功能，选择自己适合的文档，以下文字是截取该文章内的部分文字，如需要获得完整电子版，请下载此文档到您的设备，方便您编辑和打印。52细菌的感染与免疫NormalfloraandopportunisticinfectionBacterialpathogenicityProcessofinfectionAnti-bacterialimmunityialinfectionNormalfloraandopportunisticinfectionMicrobesandhumansVeryfewmicrobesarealwayspathogenicManymicrobesarepotentiallypathogenicMostmicrobesareneverpathogenicNormalfloraDefinition–bacteria,fungi,-residentflora,transientfloraFunctionsofnormalflora----Protectiveeffectsofnormalflora----Productionofnutrients-vitaminK----Primingimmunesystem-specific(naturalantibodies)----ExclusionofpathogensfromcolonizedsurfacesBacterialVirulenceInvasiveness----surfacestructuresofbacteriaadhesin,capsule,flagellum,bacterialbiofilm----invasivesubstancesinvasininvasiveenzymes----immuneescapepletephagocytosisIgAproteinaseantigenvariationBacterialBacterialtoxinsBacterialVirulence1)ExotoxinsOrigin:---ProducedmainlybyG+---Liberatedfromlivingbacterialcell