Folia Parasitologica 49[4] 259-262 (2002) | DOI: 10.14411/fp.2002.049

Light and scanning electron microscopy of Myxobolus porofilus sp. n. (Myxosporea: Myxobolidae) infecting the visceral cavity of Prochilodus lineatus (Pisces: Characiformes: Prochilodontidae) cultivated in Brazil

Edson A. Adriano1, Sarah Arana2, Paulo S. Ceccarelli3, Nelson S. Cordeiro1
1 Departamento de Parasitologia, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brasil
2 Departamento de Histologia e Embriologia, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brasil
3 Centro Nacional de Pesquisa de Peixes Tropicais (CEPTA/IBAMA), Pirassununga, SP, Brasil

Myxobolus porofilus sp. n. is described infecting the visceral cavity of Prochilodus lineatus (Valenciennes, 1836) cultivated in São Paulo State, Brazil. The plasmodial form of the parasite is 3-5 mm in length and appeared compressed between the wall of the visceral cavity and the pyloric caecum, reposing on this organ. The spores are small (length 5.7 ± 0.3 µm, width 4.8 ± 0.2 µm; mean ± SD) and round to elliptical in frontal view. The valve surfaces are smooth and have sutural folds. The polar capsules are ovoid, small (length 1.6 ± 0.1 µm, width 1.1 ± 0.1 µm) and equal in size. The polar filaments have three turns aligned perpendicularly to the longitudinal axis of the capsule. A conspicuous polar filament pore is arranged at the anterior end of the spore. The only reaction observed upon histological analysis was the presence of a capsule of connective tissue surrounding the plasmodia. This is the first report of a myxosporean parasite in the Prochilodontidae.

Keywords: Myxosporea, Myxobolus porofilus, Prochilodontidae, Prochilodus lineatus, Brazil

Received: November 19, 2001; Accepted: April 22, 2002; Published: December 1, 2002  Show citation

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Adriano, E.A., Arana, S., Ceccarelli, P.S., & Cordeiro, N.S. (2002). Light and scanning electron microscopy of Myxobolus porofilus sp. n. (Myxosporea: Myxobolidae) infecting the visceral cavity of Prochilodus lineatus (Pisces: Characiformes: Prochilodontidae) cultivated in Brazil. Folia Parasitologica, 49(4), 259-262. doi: 10.14411/fp.2002.049
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