Henneguya cuniculator sp nov., a parasite of spotted sorubim Pseudoplatystoma corruscans in the Sao Francisco Basin, Brazil

Henneguya cuniculator sp nov., a parasite of spotted sorubim Pseudoplatystoma corruscans in the Sao Francisco Basin, Brazil

Author Naldoni, Juliana Google Scholar
Maia, Antonio Augusto Mendes Google Scholar
Silva, Marcia Ramos Monteiro da Google Scholar
Adriano, Edson Aparecido Autor UNIFESP Google Scholar
Institution Universidade Estadual de Campinas (UNICAMP)
Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract Henneguya cuniculator sp. nov. was found infecting spotted sorubim catfish Pseudoplatystoma corruscans from the Sao Francisco River, Minas Gerais, Brazil. the parasites form elongated plasmodia of up to 1 cm in length in the gill filaments. Mature spores were ellipsoidal from the frontal view, with total length of 29.4 +/- 2.4 (mean +/- SD, range 23.3-32.4) mu m, body length of 12.1 +/- 1.0 (10.0-14.7) mu m, width of 4.8 +/- 0.4 (4.0-5.9) mu m, and tail length of 16.7 +/- 2.0 (12.3-19.4) mu m. From the lateral view, spores were biconvex, with thickness of 4.2 +/- 0.7 (3.9-4.9) mu m. the polar capsules were elongated and equal in size, 6.2 +/- 0.3 (5.2-6.2) mu m in length, and 1.8 +/- 0.1 (1.4-1.9) mu m in width. Ultrastructural analysis showed that the plasmodial wall had delicate projections towards the host tissue and a thin layer that prevented contact between the host cells and the parasite. in the ectoplasm, few mitochondria were observed, while generative cells, early stages of sporogenesis, and advanced spore development occurred in the plasmodial periphery, and more mature spores in internal regions. Histopathological analysis showed that plasmodia developed in the sub-epithelial connective tissue of gill filaments, causing compression of the adjacent tissues, deformation of gill filaments, and lamellar fusion. Phylogenetic analysis, based on 18S rDNA genes and using only Henneguya/Myxobolus species parasites of siluriform fish, showed grouping according to the fish family.
Keywords Myxozoa
Sao Francisco River
18S rDNA
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number CNPq: 472747/2012-6
FAPESP: 2011/10738-1
Date 2014-01-16
Published in Diseases of Aquatic Organisms. Oldendorf Luhe: Inter-research, v. 107, n. 3, p. 211-221, 2014.
ISSN 0177-5103 (Sherpa/Romeo, impact factor)
Publisher Inter-research
Extent 211-221
Origin http://dx.doi.org/10.3354/dao02685
Access rights Closed access
Type Article
Web of Science ID WOS:000330721400005
URI http://repositorio.unifesp.br/handle/11600/37316

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