Myxobolus cordeiroi n. sp., a parasite of Zungaro jahu (Siluriformes: Pimelodiade) from Brazilian Pantanal: Morphology, phylogeny and histopathology

Autor(es)

Adriano, E. A. ^[1] ; Arana, S. ^[2] ; Alves, A. L. ^[3] ; Silva, M. R. M. ^[4] ; Ceccarelli, P. S. ^[5] ; Henrique-Silva, F. ^[6] ; Maia, A. A. M. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Dept Ciencias Biol, BR-09972270 Diadema, SP - Brazil

^[2] Univ Estadual Campinas, Dept Histol & Embryol, BR-13083970 Campinas, SP - Brazil

^[3] Univ Estadual Paulista, Dept Biol, BR-13506900 Rio Claro, SP - Brazil

^[4] Univ Sao Paulo, Dept Ciencias Basicas, Fac Zootecnia & Engn Alimentos, BR-13635900 Pirassununga, SP - Brazil

^[5] Ctr Nacl Pesquisa & Conservacao Peixes Continenta, CEPTA, Inst Ch Mendes Conservacao Biodiversidade, BR-13630970 Pirassununga, SP - Brazil

^[6] Univ Fed Sao Carlos, Dept Genet & Evolucao, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Veterinary Parasitology; v. 162, n. 3-4, p. 221-229, JUN 10 2009.
• Citações Web of Science: 38

Resumo

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. (AU)

• Processo FAPESP: 06/59075-6 - Mixosporídeos parasitos de Pseudoplatystoma corruscans (pintado), Pseudoplatystoma fasciatum (cachara), Salminus brasiliensis (dourado) e Brycon hilari (piraputanga) oriundos de ambiente natural e de sistemas de criação: taxonomia e interação parasito-hospedeiro
• Beneficiário: Edson Aparecido Adriano
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores