• Title/Summary/Keyword: Ando

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Redescription of Mocroorchis spinulosus Ando, 1918 (Digenea: Nanophyetidae) encysted in the fresh water crayfish, Cambcroides similis (참가재(Cambaroides similis)에 피낭한 가시큰고환흡충 (Marroorchis spinulosus Ando, 1918)의 재기록)

  • 채종일;손운목
    • Parasites, Hosts and Diseases
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    • v.34 no.1
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    • pp.1-6
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    • 1996

  • Mccroorchis spinuLosw Ando, 1918 (Digenea: Nanophyetidael is redescribed based on adult flukes recovered from experimental mice, rats and cats which were fed with metacercariae encysted in the muscle of the crayfish, Cambnroines similis. A total of 117 adult flukes were harvested from the small intestine of the experimental animals at S-21 days post-infection. The worm recovery rate was 31-37%, not significantly different among the three kinds of animals. The metacercariae were round, 0.18 mm in average diameter, encysted with two layers of thick walls, and possessing a stylets on the oral sucker and Y- shaped exc retory bladder. The adult flukes were oval, 0.66-0.71 mm long and 0.36-0.41 mm wide, and characterized by the presence of a stylet on the oral sucker, variable location of the ovary near the mid-portion of the body, bilobed seminal vesicle, and anterolateral location of two testes. These morphological features were a little different from the original description, hence, an emended version of M. spinulosw was given. M. spinuLosw is a new intestinal trematode of animals and possibly man in Korea.

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A CHARACTERIZATION OF NEARLY SIGN-CENTRAL MATRICES

  • Lee, Gwang-Yeon;Cheon, Gi-Sang
    • Bulletin of the Korean Mathematical Society
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    • v.37 no.4
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    • pp.771-778
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    • 2000

  • The sign-central matrices were characterized by Ando and Brualdi. In this paper, we define a nearly sign-central matrices and give a characterization of nearly sign-central matrices.

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