Ultrastructure of Giardia duodenalis trophozoites group from hamster: some relevant aspects

Detalhes bibliográficos
Autor(a) principal: Sogayar, Maria Inês L. [UNESP]
Data de Publicação: 1991
Outros Autores: Gregório, Elisa Aparecida [UNESP]
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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spelling 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
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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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
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