Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects
Autor(a) principal: | |
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Data de Publicação: | 1991 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0074-02761991000400013 http://hdl.handle.net/11449/18850 |
Resumo: | Throphozoites of Giardia duodenalis group obtained from fragments or scratched of hamster's mucosa were examined by transission electron microscopy. The fine structure of the trophozoites are presented and comapred with those described for other animals. Some of the trophozoites present the cytoplasm full of glycogen, rough endoplasmic reticulum-like structures and homogeneous inclusions not enclosed by membranes, recognized as lipid drops, which had not been observed in Giardia from other animals. The adhesive disk is composed of a layer of microtubules, from which fibrous ribbons extend into the cytoplasm; these ribbons are linked by layer of crossbridge filaments that shows an intermediary dense band, described for the first time in this paper. The authors regard this band as the result of the cross-bridge filaments slinding in the medium region between adjacent fibrous ribbons, and suggest a contractile activity for them. The role of the adhesive disk on the trophozoite mechanism of attachment to host mucosa is also discussed. |
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Repositório Institucional da UNESP |
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Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspectsGiardia duodenalistrophozoiteultrastructureadhesive diskhamsterThrophozoites of Giardia duodenalis group obtained from fragments or scratched of hamster's mucosa were examined by transission electron microscopy. The fine structure of the trophozoites are presented and comapred with those described for other animals. Some of the trophozoites present the cytoplasm full of glycogen, rough endoplasmic reticulum-like structures and homogeneous inclusions not enclosed by membranes, recognized as lipid drops, which had not been observed in Giardia from other animals. The adhesive disk is composed of a layer of microtubules, from which fibrous ribbons extend into the cytoplasm; these ribbons are linked by layer of crossbridge filaments that shows an intermediary dense band, described for the first time in this paper. The authors regard this band as the result of the cross-bridge filaments slinding in the medium region between adjacent fibrous ribbons, and suggest a contractile activity for them. The role of the adhesive disk on the trophozoite mechanism of attachment to host mucosa is also discussed.UNESP Instituto de Biociências Departamento de ParasitologiaUNESP Instituto de Biociências Departamento de MorfologiaUNESP Instituto de Biociências Departamento de ParasitologiaUNESP Instituto de Biociências Departamento de MorfologiaInstituto Oswaldo Cruz, Ministério da SaúdeUniversidade Estadual Paulista (Unesp)Sogayar, Maria Inês L. [UNESP]Gregório, Elisa Aparecida [UNESP]2014-05-20T13:52:46Z2014-05-20T13:52:46Z1991-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article443-446application/pdfhttp://dx.doi.org/10.1590/S0074-02761991000400013Memórias do Instituto Oswaldo Cruz. Instituto Oswaldo Cruz, Ministério da Saúde, v. 86, n. 4, p. 443-446, 1991.0074-0276http://hdl.handle.net/11449/1885010.1590/S0074-02761991000400013S0074-02761991000400013S0074-02761991000400013.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMemórias do Instituto Oswaldo Cruz2.8331,172info:eu-repo/semantics/openAccess2023-11-29T06:14:27Zoai:repositorio.unesp.br:11449/18850Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:02:17.615285Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
title |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
spellingShingle |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects Sogayar, Maria Inês L. [UNESP] Giardia duodenalis trophozoite ultrastructure adhesive disk hamster |
title_short |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
title_full |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
title_fullStr |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
title_full_unstemmed |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
title_sort |
Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects |
author |
Sogayar, Maria Inês L. [UNESP] |
author_facet |
Sogayar, Maria Inês L. [UNESP] Gregório, Elisa Aparecida [UNESP] |
author_role |
author |
author2 |
Gregório, Elisa Aparecida [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Sogayar, Maria Inês L. [UNESP] Gregório, Elisa Aparecida [UNESP] |
dc.subject.por.fl_str_mv |
Giardia duodenalis trophozoite ultrastructure adhesive disk hamster |
topic |
Giardia duodenalis trophozoite ultrastructure adhesive disk hamster |
description |
Throphozoites of Giardia duodenalis group obtained from fragments or scratched of hamster's mucosa were examined by transission electron microscopy. The fine structure of the trophozoites are presented and comapred with those described for other animals. Some of the trophozoites present the cytoplasm full of glycogen, rough endoplasmic reticulum-like structures and homogeneous inclusions not enclosed by membranes, recognized as lipid drops, which had not been observed in Giardia from other animals. The adhesive disk is composed of a layer of microtubules, from which fibrous ribbons extend into the cytoplasm; these ribbons are linked by layer of crossbridge filaments that shows an intermediary dense band, described for the first time in this paper. The authors regard this band as the result of the cross-bridge filaments slinding in the medium region between adjacent fibrous ribbons, and suggest a contractile activity for them. The role of the adhesive disk on the trophozoite mechanism of attachment to host mucosa is also discussed. |
publishDate |
1991 |
dc.date.none.fl_str_mv |
1991-12-01 2014-05-20T13:52:46Z 2014-05-20T13:52:46Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0074-02761991000400013 Memórias do Instituto Oswaldo Cruz. Instituto Oswaldo Cruz, Ministério da Saúde, v. 86, n. 4, p. 443-446, 1991. 0074-0276 http://hdl.handle.net/11449/18850 10.1590/S0074-02761991000400013 S0074-02761991000400013 S0074-02761991000400013.pdf |
url |
http://dx.doi.org/10.1590/S0074-02761991000400013 http://hdl.handle.net/11449/18850 |
identifier_str_mv |
Memórias do Instituto Oswaldo Cruz. Instituto Oswaldo Cruz, Ministério da Saúde, v. 86, n. 4, p. 443-446, 1991. 0074-0276 10.1590/S0074-02761991000400013 S0074-02761991000400013 S0074-02761991000400013.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Memórias do Instituto Oswaldo Cruz 2.833 1,172 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
443-446 application/pdf |
dc.publisher.none.fl_str_mv |
Instituto Oswaldo Cruz, Ministério da Saúde |
publisher.none.fl_str_mv |
Instituto Oswaldo Cruz, Ministério da Saúde |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129014391373824 |