本病主要危害幼猪，造成鼻部变形，生长受阻。

It made nose deformation and restrained growth of pig.

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这是特别重要的，因为初生体重对猪一生的生长性能影响巨大。

This is particularly important since birth weight has a huge influence on lifetime pig growth.

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因此，猪骨骼肌生长发育机理的研究是十分必要的。

Therefore, the molecular mechanism studies of muscle growth and development are necessary.

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因此，猪骨骼肌生长发育机理的研究是十分必要的。

Therefore, the molecular mechanism studies of muscle growth and development are necessary.

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