上泽克通大学 Shanghai Jiao Tong University 5.7.5 Limitations of plating counting 板计数法的局限性 Single colony may arise from more than one cell(cell clump) cfu/ml colony-forming unit/ml菌落形成单位ml Too many variables 1.Inoculum size 2.Suitability of medium 3.Incubation conditions 4.Length of incubation 5.Size of colonies No.18 Shanghai Jiao Tong UniversityNo.18 Shanghai Jiao Tong University 5.7.5 Limitations of plating counting平 板计数法的局限性 Single colony may arise from more than one cell (cell clump) • cfu/ml colony-forming unit/ml 菌落形成单位/ml Too many variables 1. Inoculum size 2. Suitability of medium 3. Incubation conditions 4. Length of incubation 5. Size of colonies