维生素A缺乏犊牛眼部组织病理学观察

Eye Histopathological Observation of Beef Calves Due to Vitamin A Deficiency

为观察维生素A缺乏肉犊牛眼部组织的病理学变化,本试验对已确诊为维生素A缺乏肉犊牛的眼组织,应用常规石蜡切片技术和H.E染色,在显微镜下观察病牛眼部组织的病理学改变。结果显示,眼部组织的主要病理变化表现在:角膜增厚及穿孔,角膜细胞坏死;视乳头水肿及视锥、视杆细胞缺失;虹膜色素上皮细胞减少,色素含量与正常牛相比明显减少;虹膜血管、小梁网处血管及视网膜血管较正常牛数量减少,且虹膜血管直径明显变小。结果表明,维生素A缺乏可引起肉犊牛眼部组织的病理学改变。

To observe and research the pathological changes in the eye tissues of the Vitamin A deifciency of beef calves, routine paraffin section technique and H.E staining methods were applied.The result showed the main pathological changes of the eye tissues were as follows：the cornea thickening and perforation,corneal cells necrosis, papilledema and cone rod cell loss.The iris pigment epithelium thinning was absent and reduced.Compared with normal cows, the pigment content reduced significantly,the blood vessels of iris,the trabecular meshwork and retinal also decreased,andthediameterofirisbloodvesseldecreasedsigniifcantly.