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| Cochennec, Nathalie; Le Roux, Frédérique; Berthe, Franck; Thebault, Anne. |
| Bonamiose, a disease caused by the protozoa Bonamia ostreae, has destroyed the flat oyster Ostrea edulis production, in France but also in Europe and in the United States since 1979. Another species of Bonamia has been monitored in New-Zealand, in Australia and lately in Chile. In Canada and Australia, two other parasites have been described in cupped oyster: Mikrocytos mackini and Mikrocytos roughleyi. All these small size protozoa are grouped under the name "Mikrocell". For most of them, light and electronic microscope descriptions have been realised. Based on those criteria, different taxonomic positions have been proposed. However, these analysis are still questioned today. |
| Tipo: Text |
Palavras-chave: Bivalves; Haplosporidia; Parasites; Pathologie. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/acte-3270.pdf |
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| Diggles, Bk; Nichol, J; Hine, Pm; Wakefield, S; Cochennec, Nathalie; Roberts, Rd; Friedman, Cs. |
| Mortalities among juvenile paua Haliotis iris Martyn 1784 in a commercial culture facility were reported in April 2000. Histology of moribund paua showed heavy systemic infections of a uni- to multi-nucleate stage of a novel organism later confirmed by transmission electron microscopy (TEM) and molecular studies to be a haplosporidian. Multinucleate plasmodia up to 25 μm diameter with up to 17 nuclei were detectable in wet preparations of hemolymph from heavily infected paua. The presence of the haplosporidian in the affected facility was associated with mortalities of slow growing 'runt' paua during the summer months. Total mortalities in affected raceways 6 mo after mortalities began were between 82.5 and 90%. Heavily infected paua exhibited... |
| Tipo: Text |
Palavras-chave: Haplosporidia; Abalone; Aquaculture; Pathology; Disease; New Zealand. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/publication-2783.pdf |
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| Plischuk,Santiago; Lange,Carlos E.. |
| Durante estudios prospectivos tendientes a la detección de protistas asociados a ápidos en la región Pampeana, se observó la presencia de esporos ovales bicóncavos y grupos de esporos (cúmulos) en los túbulos de Malpighi de abejas de Dufaur, partido de Saavedra, sudoeste de la provincia de Buenos Aires. Los esporos maduros midieron 4,8 ± 0,05 x 2,4 ± 0,03 μm y la carga (intensidad) promedió 5,71 ± 1,49 x 10(6) esporos/abeja. Las detecciones se efectuaron entre julio y octubre de 2006 y la prevalencia en las colmenas positivas osciló entre 1 y 16,7 %. Las características morfológicas de los esporos, el lugar de desarrollo y la especie huésped involucrada sugieren que el microorganismo en cuestión, pertenece al género Nephridiophaga y sería N. apis... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Haplosporidia; Nephridiophaga apis; Nosema; Túbulos de Malpighi. |
| Ano: 2011 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802011000200020 |
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