| 摘要 |
A TGE virus is attenuated in organ culture of the colon of swine. After a number of passages, the resulting attenuated virus, if administered to swine will not seriously damage the villi of the small intestine, so that absorption of protein and other vital materials is not seriously hampered. The swine may suffer slight side effects, but are then immune to virulent TGE virus which is normally fatal to piglets.
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