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家兔灌胃桂枝汤，１ 日１ 次，连续３ｄ 给药以及１ 日２ 次，连续３ｄ 给药，末次给药后０．５～９ｈ 采血，分离血清，观察各含药血清对病毒致细胞病变作用的影响。结果：上述各方法制备的含药血清抗副流感病毒致ＣＰＥ作用所表现出的有效时间点分别为：无明显有效时间点、４～５ｈ、２ｈ、５～７ｈ、１～６ｈ，１ 日２ 次给药３ｄ 及１日３ 次给药后采集的含药血清可引起培养细胞明显的退行性改变。
The rabbits were treated with Guizhi Decoction on the 1st, once a day, for 3 consecutive days and twice a day, for 3 consecutive days, and blood was collected 0.5 to 9 hours after the last administration. The serum was separated and observed for each drug-containing serum against the virus. The effect of cytopathic effects. Results: The effective time points of the drug-containing serum prepared by the above methods against CPE caused by parainfluenza virus were: no obvious effective time point, 4~5h, 2h, 5~7h, 1~6h, 1st 2 The drug-containing serum collected after 3 days of sub-administration and 3 times a day can cause significant degenerative changes in cultured cells.