細菌的形態(tài)與結(jié)構(gòu)ppt課件(編輯修改稿)
2025-06-17 01:19 本頁面
【文章內(nèi)容簡介】 hagocytosis OMP： Barrier to some antibiotics O polysaccharides： Serotyping antigens Periplasm： Rich of enzymes Peptidoglycan： Supporting structure G bacteria: functions of cell wall 革蘭氏陽性菌與革蘭氏陰性菌細胞壁區(qū)別 G+菌細胞壁 G菌細胞壁 肽聚糖含量 豐富、層厚 少、薄 肽聚糖結(jié)構(gòu) 三維立體結(jié)構(gòu) 二維平面結(jié)構(gòu) 五肽交聯(lián)橋 有 無 磷壁酸 有 無 外膜 無 有 細菌細胞壁缺陷型 (Cell wall deficient forms, CWDF。 Lform) ? Derived from normal G+ or G bacteria ? Induced by antibiotics, lysozyme, etc ? Different from original cells in many ways: morphology, culture, staining, antigenicity, susceptibility to antibiotics, pathogenicity, etc ? Clinical importance: chronic infection, antibiotic resistance, diagnostic problem Normal cell Lform Penicillin Lysozyme Antibacterial mechanisms of lysozyme and penicillin Transpeptidase 細胞膜 Plasma membrane 細胞質(zhì) cytoplasm ?Gelatinoid materials surrounded by the plasma membrane ?Including： water, proteins, nucleic acids, lipids, carbohydrates, inanic salts， etc ?Pla
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