Piscinoodinium pillulare (Schaperclaus, 1954) Lom, 1981 (Dinoflagellida) infection in cultivated freshwater fish from the Northeast region of São Paulo State, Brazil: parasitological and pathological aspects
Braz. j. biol
;
61(4): 639-644, Nov. 2001. ilus, tab
Artículo
en Inglés
| LILACS
| ID: lil-308293
RESUMO
The Aquaculture Center of Unesp, Jaboticabal, SP, Brazil, received fishes for diagnosis from fish farmers reporting fish crowding at pond edges and in water inlets. Fifty-three out of 194 cases showed round to oval, immobile whitish structures, measuring up to 162 mm diameter, identified as the dinoflagellate Piscinoodinium pillulare. In 34 diagnosed cases the parasites were present in the gills, in 2 on body surface, and 9 in both. Thirty-one out of 53 were tambacu hybrids hosts; 7, Piaractus mesopotamicus; 6, Colossoma macropomum; 5, Leporinus macrocephalus; 3, Oreochromis niloticus; and 1, Prochilodus lineatus. Fish showed increased mucous production on body surface and gills, while ecchymosis in the caudal peduncle and operculum was present. The gills also showed paleness, congestion, and petechiae. Histopathology presented a great number of trophonts situated between secondary lamellae, fixed to or detached from the epithelium. Primary lamellae presented interstitial hemorrhages, severe hyperplasia of the epithelium, goblet cells, and mononuclear infiltrates. The present work is the first report of P. pillulare in Brazil and emphasizes the importance of this dinoflagellate which caused significant economic losses from 1995 through 1997
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Infecciones por Protozoos
/
Dinoflagelados
/
Enfermedades de los Peces
/
Peces
/
Agua Dulce
Límite:
Animales
País/Región como asunto:
America del Sur
/
Brasil
Idioma:
Inglés
Revista:
Braz. j. biol
Asunto de la revista:
Biologia
Año:
2001
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Unesp/BR
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