A new myxozoan from feral goldfish (Carassius auratus).
J Parasitol
; 92(2): 357-63, 2006 Apr.
Article
em En
| MEDLINE
| ID: mdl-16729695
ABSTRACT
In February 2004, a mass die-off of common goldfish Carassius auratus L., presumptively caused by bacterial coldwater disease (Flavobacterium psychrophilum), occurred at Fern Ridge Reservoir, Oregon. A range of size classes was affected, but all mature fish were female and all fish were infected with a single myxozoan, Chloromyxum auratum n. sp. No histological changes were observed associated with the parasite. Infection was represented by mictosporic plasmodia and free-floating spores in the gall bladder. Parasite spores were nearly spherical, 13.6 microm long x 12.6 microm wide x 13.1 microm thick, and possessed 4 equal-sized polar capsules. Spores had a coglike appearance in apical view because of distinct ridges 2.1 microm high protruding from the valve cells. There were 6-9 extrasutural ridges per valve (15-20 ridges per spore), aligned along the longitudinal axis, with some branching, and convergence at both poles. Morphologically, spores identified most closely with Chloromyxum cristatum Léger, 1906; however, 18S rDNA sequence data indicated only 97.5% similarity over 2,076 bp with Chloromyxum cyprini, the only synonym of C. cristatum for which DNA data are available; additional sequence data may reveal the other synonyms to be distinct species. This is the first record of a species of Chloromyxum from goldfish.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Infecções Protozoárias em Animais
/
Carpa Dourada
/
Surtos de Doenças
/
Esporos de Protozoários
/
Doenças dos Peixes
/
Doenças da Vesícula Biliar
Limite:
Animals
País/Região como assunto:
America do norte
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article