制备大肠杆菌自家苗时，为了达到理想的免疫效果，必须进行大肠杆菌菌数的测定。
To achieve an ideal effect of vaccination, Escherichia coli counts must be measured in preparing an own vaccine against fowl Escherichia coli.
方法采用统一设计的调查表格，按照国家标准GB4789.1 - 94和GB4789.2 - 94检验方法随机抽样进行菌落总数和大肠杆菌测定。
Methods Adopt specially designed investigation form, random samples according to GB4789.1-94 and GB4789.2-94, determining the total of bacterium and coli form.
对重组肠激酶在大肠杆菌中的高密度发酵表达条件、纯化方法及其生物活性测定进行了研究。
The optional high cell-density fermentation conditions, purification methods and biological activity of the recombinant enterokinase in E.
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