膜过滤培养法 Figure 6.17 Counting bacteria by filtration. (a)The bacteria in 100 ml of water were sieved out onto the surface of a membrane filter.(b) Such a filter, with the bacteria much more widely spaced was placed on a pad saturated with quid nutrient medium, and the individual bacteria grew into visible colonies. One hundred twenty four colonies are visible, so we would record 124 bacteria per 100 ml of water sample Bacteria can be counted by filtra tion when their quantity is very mall (b) SEM2 um 当样品中菌数很低时,可以将一定体积的湖水、海水或饮用水等样 品通过膜过滤器,然后将将膜转到相应的培养基上进行培养,对形 成的菌落进行统计2、膜过滤培养法 当样品中菌数很低时，可以将一定体积的湖水、海水或饮用水等样 品通过膜过滤器，然后将将膜转到相应的培养基上进行培养，对形 成的菌落进行统计