上 接种至新鲜培养基平板上 FLASH a包 ) (a)Loop is sterilized,and then a (b)Streak is made over a sterile agar loopful of inoculum is removed plate,spreading out the organisms. from tube. Following the initial streak,subsequent streaks are made at angles to it,the loop being resterilized between streaks. 16 上海交通大学通识教育核心课程《微生物的世界》
16 上海交通大学通识教育核心课程《微生物的世界》 (b) Streak is made over a sterile agar plate, spreading out the organisms. Following the initial streak, subsequent streaks are made at angles to it, the loop being resterilized between streaks. 接种至新鲜培养基平板上 (a) Loop is sterilized, and then a loopful of inoculum is removed from tube. FLASH
上游充通大警 SHANGHAI JIAO TONG UNIVERSITY 三、如何用固体培养基分离纯培养? 17 上海交通大学通识教育核心课程《微生物的世界》
17 上海交通大学通识教育核心课程《微生物的世界》 三、如何用固体培养基分离纯培养?
上游充通大¥ 使微生物茬固体培养基平板上形成单个菌落的基本方法: 稀释! 1ml 1ml Iml 1 ml Iml Original 9 ml broth inoculum in each tube Dilutions 110 1:100 1±1000 1:10.000 1100.000 m ml 1 ml Plating Calculation:Number of colonies on plate x dilution of sample number of bacteria/ml (a)Serial dilutions 18 上海交通大学通识教育核心课程 《微生物的世界》
18 上海交通大学通识教育核心课程《微生物的世界》 使微生物在固体培养基平板上形成单个菌落的基本方法: 稀释!
Original culture ml 50,000 9 ml water 9 ml water 9 ml water 9 ml water bacteria/ml (approximate number) 1:10 1:100 1:1000 1:10.000 dilution dilution dilution dilution 5,000 500 50 5 bacteria/ml bacteria/ml bacteria/ml bacteria/ml 19 上海交通大学通识教育核心课程 《微生物的世界》
19 上海交通大学通识教育核心课程《微生物的世界》
SPREAD PLATE 1、涂布平板法 METHOD 0.1ml Solid agar 1 ml of dilution Bacterial colonies appear only on surfad 使用较多的常规 Pour 0.1 ml onto surface of pre-poured agar,then spread with a bent rod. 方法,但有时涂 10 布不均匀! POUR PLATE METHOD 1:10,000 dilution of bacterial culture in 1 ml of dilution added broth to melted agar Some colonies appear on surface;many are below Mix thoroughly and pour surface. entire tube of agar into empty Petri dish.Cool to harden,and incubate. 2、稀释倒平板法 (a) Repeat previous step 3 times. After incubation,count colonies on each plate. 操作较麻烦,对 好氧菌、热敏感 菌效果不好! 78 colonies 83 colonies 81 colonies 心课程 《微生物的世界》 d
20 上海交通大学通识教育核心课程《微生物的世界》 二、用固体培养基分离纯培养 2、稀释倒平板法 1、涂布平板法 操作较麻烦,对 好氧菌、热敏感 菌效果不好! 使用较多的常规 方法,但有时涂 布不均匀!