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논문 기본 정보

자료유형
학술저널
저자정보
Yoon, Soon-Seek (National Veterinary Research and Quarantine Service) Jeong, Soon-Wuk (College of Veterinary Medicine, Konkuk University) Seo, Kang-Moon (College of Veterinary Medicine, Seoul National University) Kim, Jae-Hoon (National Veterinary Research and Quarantine Service) Jean, Young-Hwa (National Veterinary Research and Quarantine Service) Hwang, Eui-Kyung (National Veterinary Research and Quarantine Service) Chung, Gab-Soo (National Veterinary Research and Quarantine Service) Han, Hong-Ryul (College of Veterinary Medicine, Seoul National University)
저널정보
한국수의병리학회 한국수의병리학회지 한국수의병리학회지 제7권 제1호
발행연도
2003.1
수록면
17 - 21 (5page)

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From February to September in 1996, a lot of blind cattle were reported in Dangjin Area of Chungnam Province. Blindness were observed in the 143 calves of the 1,496 calves from 79 farms. Blind cattle were found only in the farms where green pasture was not fed. After administration of vitamin A as the type of feed additives and parenteral injection, the blindness cases were not occurred in those farms. Both pupils were totally dilated with the absence of pupillary light reflex in all blind cattle. In the ophthalmoscopic examination, the fundus revealed multi focal linear white mottling which was more severe in nontapetal fundus than tapetal fundus. Serum vitamin A concentration was as low as 4.1 ,$\mu\textrm{g}$/dl in the calves of the affected farms. Narrowing of optic foramen, retinal degeneration and optic disc atrophy were shown in pathological findings.

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