Kang Seonmi, Park Chanho, Seo Kangmoon
Department of Veterinary Clinical Sciences, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
Southern Branch of Gangwondo Veterinary Service Laboratory, 47 Ipchunnae-gil, Wonju-si, Gangwon-do, 26457, Republic of Korea.
J Vet Med Sci. 2017 Oct 20;79(10):1753-1756. doi: 10.1292/jvms.17-0166. Epub 2017 Sep 8.
This study reports on two Hanwoo (a native Korean breed of cattle) calves, a 3- and 6-month-old presenting with diarrhea, anorexia and blindness. Ophthalmoscopic examination revealed bilateral papilledema in both calves. Reverse-transcription polymerase chain reaction tests for bovine viral diarrhea virus, rotavirus and coronavirus were all negative. The levels of serum vitamin A in the two affected calves were 0.317 µg/dl and 0.481 µg/dl, respectively. These values are much lower than the normal vitamin A levels; therefore, the calves were diagnosed with hypovitaminosis A.
本研究报告了两头韩牛（韩国本土牛品种）犊牛，一头3个月大，另一头6个月大，它们出现腹泻、厌食和失明症状。眼科检查发现两头犊牛均有双侧视乳头水肿。对牛病毒性腹泻病毒、轮状病毒和冠状病毒进行的逆转录聚合酶链反应检测均为阴性。两头患病犊牛的血清维生素A水平分别为0.317微克/分升和0.481微克/分升。这些值远低于正常维生素A水平；因此，这两头犊牛被诊断为维生素A缺乏症。
