Novel myxosporean species parasitizing an economically important fish from the Amazon basin

Autor(es)

Capodifoglio, Kassia R. H. ^[1] ; Adriano, Edson A. ^{[2, 3]} ; Naldoni, Juliana ^[3] ; Meira, Caroline M. ^[1] ; da Silva, Marcia R. M. ^[1] ; Maia, Antonio A. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Anim Sci & Food Engn, Dept Vet Med, Pirassununga, SP - Brazil

^[2] Univ Campinas UNICAMP, Inst Biol, Dept Anim Biol, Campinas, SP - Brazil

^[3] Fed Univ Sao Paulo UNIFESP, Dept Ecol & Evolutionary Biol, Diadema, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Parasitology Research; v. 119, n. 4 MAR 2020.
• Citações Web of Science: 1

Resumo

This paper provides morphological and phylogenetic analyses of two new myxobolid species found infecting Piaractus brachypomus from the Amazon basin. The fish were caught in the Tapajos River, in the municipality of Santarem, in the state of Para, Brazil. The plasmodial development of Henneguya brachypomus n. sp. occurred in the gill lamellae while Myxobolus pirapitingae n. sp. developed in the pyloric cecum. Morphological analyses did not identify inflammatory infiltrate for either species, but H. brachypomus n. sp. induced stretching of the epithelium, compression of the adjacent tissues, and displacement and deformation of the neighboring lamellae. The mature myxospores of H. brachypomus n. sp. were ellipsoid, with a length of 11.7-13.8 mu m, a width of 4.0-4.6 mu m, and a thickness of 3.5 \& x2d7;4.3 mu m. The polar capsules were elongated, with a length of 5.6-7.3 mu m and a width of 1.3-2.0 mu m, and each contained a polar filament with 8-9 coils. The caudal process was 40.5-48.1 mu m long and the total length of the myxospore was 52.4-61.6 mu m. Myxobolus pirapitingae n. sp. exhibited rounded mature myxospores measuring 10.0-11.1 mu m in length, 7.0-7.6 mu m in width, and 5.4-6.3 mu m in thickness. The polar capsules were of equal size and occupied less than half the myxospore, measuring 3.5-4.0 mu m in length and 2.0-2.6 mu m in width, with each containing a polar filament with 6-7 coils. Phylogenetic analysis based on partial small subunit ribosomal DNA (ssrDNA) sequences showed that H. brachypomus n. sp. clustered as a sister species of Henneguya piaractus, while M. pirapitingae n. sp. was grouped in a sub-clade together with Myxobolus matosi and Myxobolus colossomatis. (AU)

• Processo FAPESP: 16/22047-7 - Mixosporídeos parasitos de peixes Perciformes de importância comercial (Cichla spp. e Plagioscion spp.) da Bacia Amazônica
• Beneficiário: Edson Aparecido Adriano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/22700-7 - Sistemática e interação parasito-hospedeiro de mixosporídeos parasitos de peixes da família Pimelodidae da Bacia Amazônica
• Beneficiário: Juliana Naldoni
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/21374-6 - Sistemática e interação parasito-hospedeiro de parasitos do filo Myxozoa em peixes de importância econômica da Bacia Amazônica
• Beneficiário: Edson Aparecido Adriano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular
• Processo FAPESP: 15/07713-8 - Sistemática e caracterização genética de populações mixosporídeos parasitos de Colossoma macropomum e Piaractus brachypomus da Bacia Amazônica
• Beneficiário: Kassia Roberta Hygino Capodifoglio
• Modalidade de apoio: Bolsas no Brasil - Doutorado