日本中央競馬会競走馬保健研究所報告
Online ISSN : 1884-4634
Print ISSN : 0368-5543
ISSN-L : 0368-5543
馬における肝単包虫の2症例について
兼丸 卓美兼子 樹広及川 正明吉原 豊彦桐生 啓治佐藤 博小野 威広瀬 恒夫
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1976 年 1976 巻 13 号 p. 8-18

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There were three large-sized solitary cysts in the liver of each of two horses, Nos. 1 and 2. Horses 1 and 2 were a 16-year-old halfbred gelding and a 22-year-old female Thoroughbred born in Ireland and England and imported into Japan at the age of 6 and 5, respectively. All the cysts were unilocular and had numerous brood capsules containing protoscolices in the interior. Their wall consisted of an inner germinar layer, an outer cuticular membrane, and calcareous corpuscles. Each cyst was surrounded by the host capsule . All the cysts were morphologically identified as those of Echinococcus unilocularis (larvae of E, granulosus). In horses 1 and 2, the cysts were found to belong to E . polymorphus and E. cysticus, respectively, when classified on the basis of morphology. All the cysts were also diagnosed as those of Es fertilis on the basis of the existence of protoscolices . The following surmise may possibly be made on the hepatic hydatid cysts in the two horses : It is within the bounds of possibility that the cysts may be larvae of E, granulosus equinus and that the infestation of the parasite may have occured to the two horses in Ireland and England, respectively.

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