Please use this identifier to cite or link to this item: http://repositorio.ufpa.br/jspui/handle/2011/5971
metadata.dc.type: Artigo de Periódico
Issue Date: Mar-2010
metadata.dc.creator: AZEVEDO, Carlos José Correia de
CASAL, Graça Maria Figueiredo
MENDONÇA, Ivete Lopes de
CARVALHO, Erisson
MATOS, Patrícia Santos
MATOS, Edilson Rodrigues
Title: Light and electron microscopy of Myxobolus sciades n. sp. (Myxozoa), a parasite of the gills of the Brazilian fish Sciades herzbergii (Block, 1794) (Teleostei: Ariidae)
Citation: AZEVEDO, Carlos et al. Light and electron microscopy of Myxobolus sciades n. sp. (Myxozoa), a parasite of the gills of the Brazilian fish Sciades herzbergii (Block, 1794) (Teleostei: Ariidae). Memórias do Instituto Oswaldo Cruz, Rio de Janeiro, v. 105, n. 2, p. 203-207, mar. 2010. Disponível em: <http://www.scielo.br/pdf/mioc/v105n2/16.pdf>. Acesso em: 10 jul. 2014. <http://dx.doi.org/10.1590/S0074-02762010000200016>.
Abstract: A myxosporean parasite in the gill lamellae of the freshwater teleost fish, Sciades herzbergii (Ariidae) (Block, 1794), from the Poti River (Northeast of Brazil) was described by light and electron microscopy studies. Polysporic histozoic cyst-like plasmodia containing several life-cycle stages, including mature spores, were observed. The spores were pyriform and uninucleate, measuring 9.15 ± 0.39 μm (n = 50) long, 4.36 ± 0.23 μm (n = 25) wide and 2.61 ± 0.31 μm (n = 25) thick. Elongated pyriform polar capsules (PC) were of equal size (4.44 ± 0.41 μm long and 1.41 ± 0.42 μm in diameter) and each contained a polar filament with 9-10 coils obliquely arranged in relation to the axis of PC. The PC wall was composed of two layers of different electron densities. Histological analysis revealed the close contact of the cyst-like plasmodia with the basal portion of the epithelial gill layer, which exhibited some alterations in the capillary vessels. Based on the morphological and ultrastructural differences, the similarity of the spore features to those of the genus Myxobolus and the specificity of this host to previously described species, we describe a new species named Myxobolus sciades n. sp. in this study.
Keywords: Peixe
Parasitos
Ictioparasitologia
Infecção parasitária
Myxobolus sciades
Myxozoa
Sciades herzbergii
Teleósteos
Ultraestrutura
Esporos
Brânquias
Guelras
Rio Poti - PI
Piauí - Estado
ISSN: 0074-0276
metadata.dc.rights: Acesso Aberto
Appears in Collections:Artigos Científicos - ICB

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