有哪些信誉好的足球投注网站- 1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
- 2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击 这里二次下载。
- 3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
查看更多
英文版-Indiana_University_Purdue_University_Fort_Wayne微生物学授课讲义 lecture 12
Enterobacteriaceae BIOL 533 Lecture 12 Enterobacteriaceae Diversity of species Ecology Found worldwide in soil, water, vegetation, and microbial flora of animals and humans Some are always associated with disease e.g., Shigella, Salmonella, Yersinia pestis Some are normal flora that can become opportunistic pathogens e.g., E. coli, K. pneumoniae, P. mirabilis Enterobacteriaceae Epidemiology Animal reservoir: most Salmonella infections Human carrier: Salmonella typhi, Shigella Endogenous spread in a susceptible patient Can involve all body sites 5% hospitalized patients develop nosocomial infections, primarily caused by Enterobacteriaceae such as Escherichia Sites of infection Microbial Physiology and Structure Cell morphology Moderate-sized Gram— rods Non-spore-forming Motile (with peritrichous flagella) or non-motile Physiology All are facultative anaerobes Simple nutritional requirements: Ferment glucose Reduce nitrates to nitrites Distinguishing Characteristics Oxidaseˉ: Distinguishes among other fermentative and non-fermentative Gram— bacilli Lactose fermentation (red colonies on MacConkey agar) Separate Escherichia, Klebsiella, Enterobacter from other lactose— Enterobacteriaceae Distinguishing Characteristics Resistance to bile salts Separate Shigella and Salmonella from normal flora in this group Eosin Methylene Blue (EMB) Lactose, eosinY, methylene blue; Lac+; grow with green sheen Virulence Factors Antigens Somatic “O” LPS Major cell wall Ag; heat stable Specific “O” antigens associated with each genus; however, cross reactions are common Salmonella and Citrobacter Escherichia and Shigella Virulence Factors Capsular K Either protein or polysaccharide Heat-labile May interfere with detection of “O” Removed by boiling organisms Capsular antigen of Salmonella typhi referred to as Vi antigen Virulence Factors Capsular K, continued Shared by different genera both inside and outside of family Cross reactions E. coli K1 with N. meningitidis and Haemophilus m
文档评论（0）