分别于第1~4周龄时取十二指肠在光学显微镜下进行组织学观察。

Duodenum samples were taken from 1,2,3,4 wk broilers for morphological study with light microscopy.

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图1诱导培养后1周，普通光学显微镜下细胞聚集成团，形态变的不规则，呈铺路石样排列。

Figure 1 After 1 week of induced culturing, cells aggregated, morphology became irregular and aligned like gravels (Inverted phase contrast microscope).

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图1诱导培养后1周，普通光学显微镜下细胞聚集成团，形态变的不规则，呈铺路石样排列。

Figure 1 After 1 week of induced culturing, cells aggregated, morphology became irregular and aligned like gravels (Inverted phase contrast microscope).

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