| Processing of food vacuoles in the parasitic ciliate Ichthyophthirius multifiliis after exit from the host. | |
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MedLine Citation:
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PMID: 8327449 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The digestive cycle of the fish parasite Ichthyophthirius multifiliis (Ciliophora) can be divided into three main stages. During stage A the vacuoles are not yet condensed. This stage can be subdivided into an early phase in which food vacuoles contain almost intact fish cells and a later phase in which dense material accumulates at the periphery of the vacuoles. At stage B, food vacuoles attain a very high density, and at stage C the vacuole expands when the membrane pulls away from a condensed mass of substances in digestion. After its exit from the host the parasite encysts and divides, but new food vacuoles are not formed during this phase of the life cycle. Type A vacuoles are the first to disappear after exit from the host. The percentage of type B vacuoles increases during the first few hours of free life, decreasing later when the percentage of type C vacuoles starts to increase. At the end of the division phase, type C vacuoles are the most common. Food-vacuole egestion was observed only 20 h after exit from the host. At the theront stage, food vacuoles were not evident, but small vacuoles with acid phosphatase activity were observed. |
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Authors:
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A Lobo-da-Cunha; C Azevedo |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Parasitology research Volume: 79 ISSN: 0932-0113 ISO Abbreviation: Parasitol. Res. Publication Date: 1993 |
Date Detail:
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Created Date: 1993-08-11 Completed Date: 1993-08-11 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8703571 Medline TA: Parasitol Res Country: GERMANY |
Other Details:
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Languages: eng Pagination: 272-8 Citation Subset: IM |
Affiliation:
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Department of Cell Biology, University of Oporto, Porto, Portugal. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Digestion* Goldfish / parasitology Host-Parasite Interactions Hymenostomatida / physiology, ultrastructure* Vacuoles / physiology, ultrastructure* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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