Bleeding Disorder in Japanese Black Cattle with Umbilical Cord Bleeding as a Major Clinical Sign

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  • 臍帯出血を主徴とする黒毛和種牛の出血性疾患
  • セイタイ シュッケツ オ シュチョウ ト スル クロゲワシュ ウシ ノ シュッ

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Abstract

Bleeding from umbilical cord stump, which had been a rare symptom in the Chediak-Higashi syndrome (C-HS) or hemophilia-like disease, has been found in 33 Japanese Black cattle in the South Kyusyu area, Japan. We found that 1) the disease could be inherited by the enzootic study, the pedigree analysis and the result of a test mating; 2) most of those affected animals died within an year due to umbilical cord bleeding or recurrent hemorrhage; 3) the results of screening tests had no prominent abnormalities except the moderately low ADP-induced platelet aggregation. According to the results above, the hemorrhagic disease characterized by umbilical bleeding was considered to be a new inherited bleeding disorder which is totally different from the C-HS and the hemophilia-like disease.

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