细菌生理及外界因素对细菌的影响 示教 操作 细菌的生长现象 紫外杀菌实验 液体、固体、半固体 (大肠埃希菌、枯草杆菌) 培养基 细菌分离培养方法——平 生物因素对细菌的影响 板划线法 ·药敏实验 (混合菌液) 噬菌体对细菌的作用 细菌代谢产物检查方法一 细菌的代谢产物的检查 IMVIC试验接种 乳糖发酵实验 (大肠埃希菌、产气肠杆菌) 硫化氢实验 尿素分解实验
细菌生理及外界因素对细菌的影响 • 示教 – 细菌的生长现象 • 液体、固体、半固体 培养基 – 生物因素对细菌的影响 • 药敏实验 • 噬菌体对细菌的作用 – 细菌的代谢产物的检查 • 乳糖发酵实验 • 硫化氢实验 • 尿素分解实验 • 操作 – 紫外杀菌实验 ( 大肠埃希菌、 枯草杆菌) – 细菌分离培养方法——平 板划线法 (混合菌液) – 细菌代谢产物检查方法— —IMViC试验接种 (大肠埃希菌、 产气肠杆菌)
Nutrient requirements of bacterial growth water Carbon source Nitrogen source Minerals Growth factors organic compounds such as amino acids purines 嘌呤, pyrimidines嘧啶, and vitamins that a cell must have for growth but cannot synthesize itself
Nutrient requirements of bacterial growth • water • Carbon source • Nitrogen source • Minerals • Growth factors: organic compounds such as amino acids, purines 嘌呤, pyrimidines嘧啶, and vitamins that a cell must have for growth but cannot synthesize itself
culture medium培养基: Substances used for artificia cultivation of bacteria
• culture medium培养基: Substances used for artificial cultivation of bacteria
Classification of culture medium According to basic ingredients Minimal essential growth mediun基础培养基 enrichment medium增菌培养基 selective medium选择培养基 differential medium鉴别培养基 According to physical condition · liquid medium液体培养基 · solid medium固体培养基:1.5~2.5% of agar · semisolid medium半固体培养基:0.3~0.5% of agar
• Classification of culture medium: – According to basic ingredients: • Minimal essential growth medium基础培养基 • enrichment medium增菌培养基 • selective medium选择培养基 • differential medium鉴别培养基 – According to physical condition: • liquid medium液体培养基 • solid medium固体培养基: 1.5~2.5% of agar • semisolid medium半固体培养基: 0.3~0.5% of agar
Phenomena of bacterial growth 细菌在培养基中的生长情况 In liquid medium: surface growth pellicle表面生长, uniformly turbid均匀混浊生长, sediment in bottom沉淀 生长
Phenomena of bacterial growth 细菌在培养基中的生长情况 • In liquid medium: surface growth pellicle表面生长, uniformly turbid均匀混浊生长, sediment in bottom沉淀 生长
On solid medium CITRATE AGAR Negative Positive
• On solid medium :
MOTILITY TEST In semisolid medium 无动力有动力
• In semisolid medium : 无动力 有动力
susceptibility test药敏试验 抑菌圈
抑菌圈 susceptibility test 药敏试验
痢疾杆菌噬菌体 涂布大肠杆菌 涂布痢疾杆菌 肉汤
涂布痢疾杆菌 涂布大肠杆菌 肉汤 痢疾杆菌噬菌体
uv30 培养箱 接种大 肠杆菌 接种枯 草杆菌
接种大 肠杆菌 接种枯 草杆菌 班级、姓名 /学号、 大肠 枯草 uv30 ’ 培养箱