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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 102, No. 2, 2007, pp. 155-157
Bioline Code: oc07027
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 102, No. 2, 2007, pp. 155-157

 en Theileria electrophori check for this species in other resources n.sp., a parasite of the electric eel Electrophorus electricus check for this species in other resources (Osteichthyes: Cypriniformes: Gymnotidae) from Amazonian Brazil
Lainson, Ralph

Abstract

The name Theileria electrophori check for this species in other resources n.sp. is proposed for a small parasite described in the erythrocytes of the electric eel, Electrophorus electricus check for this species in other resources , from Amazonian Brazil. Division of the organism in the erythrocyte produces only four bacilliform daughter cells which become scattered in the host cell, without a cruciform or rosette-shaped disposition. Exoerythrocytic meronts producing a large number of merozoites were encountered in Giemsa-stained impression smears of the internal organs, principally in the liver, and are presumably the source of the intraerythrocytic forms of the parasite. This developmental pattern is characteristic of piroplasms within the family Theileriidae, where the author considers the parasite of E. electricus to most appropriately belong. It effectively distinguishes the organism from the dactylosomatid parasites Babesiosoma Jakowska and Nigrelli, 1956 and Dactylosoma Labbé, 1894 also found in fishes. This appears to be the second report of Theileria Bettencourt, Franca and Borges, 1907 in a fish.

Keywords
Theileria electrophori n.sp. - Electrophorus electricus - electric eel - Babesiosoma - Dactylosoma - Brazil

 
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