Phylogeny, ultrastructure, histopathology and prevalence of Myxobolus oliveirai sp. nov., a parasite of Brycon hilarii (Characidae) in the Pantanal wetland, Brazil

Autor(es)

Milanin, Tiago ^[1] ; Eiras, Jorge C. ^{[2, 3]} ; Arana, Sarah ^[4] ; Maia, Antonio A. M. ^[5] ; Alves, Anderson L. ^[6] ; Silva, Marcia R. M. ^[5] ; Carriero, Mateus M. ^[5] ; Ceccarelli, Paulo S. ^[7] ; Adriano, Edson A. ^[8]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Biol Anim, Campinas, SP - Brazil

^[2] Univ Porto, Dept Biol, P-4100 Oporto - Portugal

^[3] Univ Porto, Ctr Interdisciplinar Invest Marinha & Ambiental, Fac Ciencias, P-4100 Oporto - Portugal

^[4] Univ Estadual Campinas, Dept Histol & Embryol, Campinas, SP - Brazil

^[5] Univ Sao Paulo, Dept Ciencias Basicas, Fac Zootecnia & Engn Alimentos, Pirassununga, SP - Brazil

^[6] Univ Estadual Paulista, Dept Biol, Rio Claro, SP - Brazil

^[7] Inst Chico Mendes Conservacao Biodiversidade, Ctr Nacl Pesquisa & Conservacao Peixes Continenta, Pirassununga, SP - Brazil

^[8] Univ Fed Sao Paulo, Dept Ciencias Biol, BR-09972270 Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Memórias do Instituto Oswaldo Cruz; v. 105, n. 6, p. 762-769, SEP 2010.
• Citações Web of Science: 28

Resumo

This paper presents the morphological, histological and ultrastructural characteristics of Myxobolus oliveirai sp. nov., a parasite of the gill filaments in Brycon hilarii from the Brazilian Pantanal. Out of 216 B. hilariispecimens examined (126 wild and 90 cultivated), 38.1% of wild specimens (n = 48) were infected. The parasites form elongated plasmodia primarily in the tip of gill filaments, reaching about 3 mm in length. A thorough comparison with all the Myxobolus species described from South American hosts, as well as nearly all the Myxobolus species described so far is provided. Partial sequencing of the 18S rDNA gene revealed a total of 1,527 bp. The Myxobolus species parasite of B. hilarii did not match any of the Myxozoa available in GenBank. In the phylogenetic analysis, M. oliveirai sp. nov. composed a monophyletic group with eight other species: five species of Myxobolus parasites of mugilid fishes, two parasites of pangasiid and one of centrarchid. Infection prevalence values of the parasite revealed no significant differences between wet and dry seasons or between males and females. The importance of the infection to the farming of the host species is emphasized. (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