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Light and electron microscope study of a Lankesterella petiti n. sp., (Apicomplexa : Lankesterellidae) infecting Bufo marinus (Amphibia: Anura) in Pará, North Brazil

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1995
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Light and electron microscope study of a Lankesterella petiti n. sp., (Apicomplexa : Lankesterellidae) infecting Bufo marinus (Amphibia: Anura) in Pará, North Brazil.pdf (3.100xmlui.dri2xhtml.METS-1.0.size-megabytes)
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http://patua.iec.gov.br//handle/iec/2691
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Lainson, Ralph
Paperna, I
xmlui.dri2xhtml.METS-1.0.item-abstract
Captive toads, Bufo marinus, were either inoculated with blood or fed with blood and liver from two other toads which were showing sporozoites of a Lankesterella sp., in their erythrocytes. Stages ranging from late zygotes to sporulated oocysts were encountered in various tissues of two of the experimental animals. Development of the parasite was shown to be in the endothelium of the blood vessels, which explains distribution of resulting sporozoites in a wide range of different tissues. Ultrastructure studies revealed wall-forming-like organelles in the late zygote which are seemingly involved in the deposition of the thick wall of the sporulating oocyst. This wall is perforated in several places, allowing extensions of the parasite, with contained mitochondria, to extend out to the limits of the parasitophorous vacuole. These features, together with the presence of one to several refractile bodies bounded by a coat of electron-dense droplets, appear to be unique to Lankesterella.
 
Des spécimens de Bufo marinus en captivité sont infectés soit par inoculation de sang, soit par ingestion de sang et de foie de deux autres crapauds présentant des sporozo'tes de Lankesterella dans leurs hématies. Les différents stades depuis le zygote âgé jusquÆà lÆoocyste sporulé ont été obtenus dans différents tissus de deux des crapauds infectés. Il est démontré que le développement du parasite sÆeffectue dans lÆendothélium des vaisseaux sanguins, ce qui explique que les sporozo'tes qui en sont issus se trouvent dans beaucoup de tissus différents. Les études ultrastructurales montrent que des organites, rappelant les granules constitutifs de la paroi du zygote âgé, semblent également intervenir dans la formation de l'épaisse paroi de l'oocyste en cours de sporulation. Cette paroi est perforée en différents endroits, ce qui permet l'issue d'expansions cytoplasmiques contenant des mitochondries hors des limites de la vacuole parasitophore. Ces faits, ainsi que l'existence d'un ou plusieurs corps réfringents entourés d'un manteau de gouttelettes denses, semblent particuliers aux Lankesterella.
 
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LAINSON, Ralph; PAPERNA, I. Light and electron microscope study of a Lankesterella petiti n. sp., (Apicomplexa: Lankesterellidae) infecting Bufo marinus (Amphibia: Anura) in Pará, North Brazil. Parasite, v. 2, n. 3, p. 307 - 313, 1995.
xmlui.dri2xhtml.METS-1.0.item-decsPrimary
Apicomplexa / classificação
Apicomplexa / ultraestrutura
Bufo marinus / sangue
Bufo marinus / parasitologia
Zigoto / parasitologia
Microscopia Eletrônica / métodos
Corantes Azur
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  • SAPAR - Artigos Científicos

Instituto Evandro Chagas - SVS - MS - 2007-2018 Rodovia BR316 km 7 sn - Levilandia - 67030-000 - Ananindeua - Para - Brasil.
Licença Creative CommonsEste trabalho está licenciado com uma Licença Creative Commons - Atribuição-NãoComercial 4.0 Internacional
Tel: (55 91) 3214-2191
Email: biblioteca@iec.gov.br / clariceneta@iec.gov.br
 

 

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Instituto Evandro Chagas - SVS - MS - 2007-2018 Rodovia BR316 km 7 sn - Levilandia - 67030-000 - Ananindeua - Para - Brasil.
Licença Creative CommonsEste trabalho está licenciado com uma Licença Creative Commons - Atribuição-NãoComercial 4.0 Internacional
Tel: (55 91) 3214-2191
Email: biblioteca@iec.gov.br / clariceneta@iec.gov.br