| 摘要 |
The invention provides a method of rearing a bird of germ-free status. The method comprises housing a bird as a parent bird, surgically removing an egg in its shell from the parent bird prior to transfer of the egg to the cloaca in the paren t bird, incubating the egg still in its shell and hatching the egg to produce a layi ng bird. The invention also relates to the production of avian eggs of germ-free status.
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