| A redescription of schizogony of Cytauxzoon felis in the domestic cat. | |
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MedLine Citation:
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PMID: 1626865 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cytauxzoon felis is a protozoan parasite that is transmitted by Dermacentor variabilis ticks and causes a uniformly fatal disease in domestic cats. In order to study schizogony and merozoite formation, D. variabilis nymphs were allowed to feed on domestic cats experimentally infected with C. felis, after which the molted adult ticks were fed on susceptible cats. Lung and liver tissues were collected from the cats during clinical cytauxzoonosis and were fixed for light and transmission electron microscopy. Some stages of parasite development were evident with light microscopy, but specific events associated with merogony could be documented only with electron microscopy. Schizogony was observed in endothelial macrophages of all tissues examined. The parasite appeared first as a multinucleated syncytium in which nuclear proliferation was evident. As the parasite syncytium developed, it became an increasingly elaborate labyrinth with extensive branches that were interconnected by thin processes of parasite cytoplasm. Organelles, including mitochondria and rhoptries, became apparent. Merozoite formation seemed to occur by rapid sequential fission along the margins of the multinucleated sporont in the cytoplasm of the host cell. As the sporont became smaller, merozoites were produced in a rosette-like configuration from the remaining parasite mass. Merozoites entered erythrocytes directly by endocytosis, without apparent injury to these cells. The sequence of events associated with merozoite formation in Cytauxzoon felis described herein differs from the previous description for this species and appears to be analogous to that described for the genus Theileria. |
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Authors:
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A A Kocan; K M Kocan; E F Blouin; S W Mukolwe |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Annals of the New York Academy of Sciences Volume: 653 ISSN: 0077-8923 ISO Abbreviation: Ann. N. Y. Acad. Sci. Publication Date: 1992 Jun |
Date Detail:
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Created Date: 1992-08-13 Completed Date: 1992-08-13 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 7506858 Medline TA: Ann N Y Acad Sci Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 161-7 Citation Subset: IM |
Affiliation:
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Department of Veterinary Parasitology, College of Veterinary Medicine, Oklahoma State University, Stillwater 74078. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Arachnid Vectors / parasitology Cat Diseases / parasitology* Cats Dermacentor / parasitology Microscopy, Electron Piroplasmida / physiology*, ultrastructure Protozoan Infections / parasitology Protozoan Infections, Animal* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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