之后，随着防风剂量的增加，两种细菌的菌落数呈逐渐下降的趋势。
Afterwards, with the increase of the doses, the Numbers of CFU declined gradually.
与常规的沉降法相比，浮游细菌采样器能直接得到单位体积空气中所含的菌落数，而且不受环境气流的影响。
Compared with the conventional settlement, planktonic bacteria sampler can be directly contained in unit volume of air bacteria counts, and the impact of air from the environment.
结果：标本中生长的细菌与大肠内容物培养细菌种类相同，实验组标本的菌落数少于对照组（P<0，01）。
Results The bacterial species in each sample were the same as that of colon contents. The bacteria-colony number of each sample in the experimental group was lower than that in control(P<0.01).
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