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Ultrastructure of metacercarial cysts of six heterophyid trematodes from fish

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Abstract

The ultrastructure of metacercarial cysts of Ascocotyle sexidigita, A. (Phagicola) diminuta, and Pygidiopsoides spindalis (herein described for the first time) collected from natural hosts in California was compared with that of cysts from A. tenuicollis (also described for the first time), A. pachycystis, and A. leighi collected from natural fish hosts in Mississippi. The results show that none of the cysts studied approximated the thick cyst produced by A. pachycystis, but all cysts comprised several layers of putative glycoprotein except for A. (P.) diminuta, which was associated with a single layer of spongy cyst wall.

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Authors and Affiliations

  1. Department of Biology, Azusa Pacific University, MPT, P.O. Box 7000, Mary Hill Center 101, Azusa, CA 91702-7000, USA e-mail: marmitage@apunet.apu.edu, , , , , , US

    Mark H. Armitage

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  1. Mark H. Armitage
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Received: 30 August 1999 / Accepted: 18 February 2000

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Armitage, M. Ultrastructure of metacercarial cysts of six heterophyid trematodes from fish. Parasitol Res 86, 1003–1007 (2000). https://doi.org/10.1007/PL00008518

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  • DOI: https://doi.org/10.1007/PL00008518

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