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β-內(nèi)酰胺類(lèi)抗生素(2)-在線(xiàn)瀏覽

2025-06-24 18:15本頁(yè)面
  

【正文】 nicillin binding proteins( PBPs) → blocks the eptidoglycan synthesis → inhibits the formation of the cell wall→ causes the cell death 青 G→ 與 PBPs 相結(jié)合 → 抑制粘肽合成 → 破壞菌體細(xì)胞壁 → 菌體死亡 mechanism of action 11/35 1. multiplication stage bactericide (繁殖期殺菌藥) 2. G+ bacteria > G bacteria 3. safety to the body 對(duì)人體毒性小 characteristics 12/35 Resistance: betalactamase bacteria →produce beta lactamase →open the beta lactam ring → the drug’s action ↓ ∥ 細(xì)菌 →產(chǎn)生 beta 內(nèi)酰胺酶 →打開(kāi) beta 內(nèi) 酰胺 →藥物效應(yīng) ↓ 13/35 Adverse reaction: reaction: symptom: skin hypersusceptibility () R , circulation, and CNS reasons: the cleavage product of penicillins 致敏原為青霉素降解產(chǎn)物(青霉烯酸蛋白、青霉 噻唑蛋白), 6APA高分子聚合物 14/35 1. Ask allergic history 2. Make skin test 3. Observe the reaction of skin test 4. Prepare an emergency treatment: Adrenaline、 hydrocortisone H1receptor blocking drugs 一問(wèn) 二試 三觀(guān)察 四搶救 prophylaxis and treatment: 15/35 2. others: ⑴ herxheimer reaction 赫氏反應(yīng) :治療梅毒或鉤端螺旋體病、雅司、鼠咬熱或炭疽時(shí),癥狀加劇的現(xiàn)象。 2 cephalosporins mon characteristics structure: 7ACA 基本結(jié)構(gòu): 7
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