Navegando por Palavras-chave "Zungaro jahu"

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    Myxobolus cordeiroi n. sp., a parasite of Zungaro jahu (Siluriformes: Pimelodiade) from Brazilian Pantanal: Morphology, phylogeny and histopathology
    (Elsevier B.V., 2009-06-10) Adriano, Edson Aparecido [UNIFESP]; Arana, Sarah; Alves, Anderson Luiís; Silva, Marcia Ramos Monteiro da; Ceccarelli, Paulo Sergio; Henrique-Silva, Flavio; Maia, Antonio Augusto Maia; Universidade Federal de São Paulo (UNIFESP); Universidade Estadual de Campinas (UNICAMP); Univ Estadual Paulista; Universidade de São Paulo (USP); Ctr Nacl Pesquisa & Conservacao Peixes Continenta; Universidade Federal de São Carlos (UFSCar)
    This work is part of an ongoing investigation into the characteristics of Myxozoan parasites of freshwater fish in Brazil and was carried out using morphology, histopathology and molecular analysis. A new Myxosporea species (Myxobolus cordeiroi) is described infecting the jau catfish (Zungaro jahu). Fifty jau specimens were examined and 78% exhibited plasmodia of the parasite. the plasmodia were white and round, measuring 0.3-2.0 mm in diameter and the development occurred in the gill arch, skin, serosa of the body cavity, urinary bladder and eye. the spores had an oval body and the spore wall was smooth. Partial sequencing of the 18S rDNA gene resulted in a total of 505 bp and the alignment of the sequences obtained from samples in different organs revealed 100% identity. in the phylogenetic analysis, the Myxobolus species clustered into two clades-one primarily parasites of freshwater fish and the other primarily parasites of marine fish. M. cordeiroi n. sp. was clustered in a basal position in the freshwater fish species clade. the histological analysis revealed the parasite in the connective tissue of the different infected sites, thereby exhibiting affinity to this tissue. the plasmodium was surrounded by an outer collagen capsule of fibers with distinct orientation from the adjacent connective tissue and an inner layer composed of delicate collagen fibrils-more precisely reticular fibers. the development of the parasite in the cornea and urinary bladder caused considerable stretching of the epithelium. (C) 2009 Elsevier B.V. All rights reserved.
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    Prevalência, distribuição geográfica e sazonal de protozoários e mixozoários parasitos de jaú (Zungaro jahu) no Pantanal Matogrossense
    (Colégio Brasileiro de Patologia Animal - CBPAEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA), 2012-12-01) Adriano, Edson Aparecido [UNIFESP]; Ceccarelli, Paulo Sergio; Silva, Marcia Ramos Monteiro da; Maia, Antonio Augusto Mendes; Universidade Federal de São Paulo (UNIFESP); ICMBio Centro Nacional de Pesquisa e Conservação de Peixes Continentais; Universidade de São Paulo (USP)
    In a study carried out in the Pantanal of Mato Grosso, Brazil, the prevalence, geographic and seasonal distribution of protozoan and myxozoan parasites of Zungaro jahu was evaluated. The fish were captured in the southern region of Pantanal Mato-grossense (Aquidauana, Miranda and Paraguay rivers) in 2001, 2002 and 2003, in the central region (Pantanal National Park - PARNA Pantanal) in 2003, 2004, 2005 and 2008, and in the northern region (Cuiabá and Manso rivers, in the municipality of Nobres) in 2003, 2004 and 2005. Trichodina sp. was identified parasitized skin and gills of jaú in the three regions studied. Epistylis sp. parasitized skin and Cryptobia sp. the gills and were restricted to the Central region, whilst Ichthyophthirius multiiiliis parasitized skin in the three regions studied. The occurrence of myxozoans was also observed: Myxobolus cordeiroi parasitized several organs and Henneguya sp. parasitized the gills of jaú in the three regions studied.