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Title

Neoparamoeba Page, 1987: light and electron microscopic observations on six strains of different origin

AuthorsDyková, Iva; Figueras Huerta, Antonio ; Peric, Z.
KeywordsParamoeba
Neoparamoeba
Etiology of AGD
Mariculture
Issue DateDec-2000
PublisherInter Research
CitationDiseases of Aquatic Organisms 43(3): 217-223 (2000)
AbstractAlthough amoebic gill disease (AGD) has emerged as one of the most severe health problems in the fish industry, proof of the identity of AGD agents from various localities is still missing. Six strains of amoebae designated until recently as Paramoeba species (the agents of AGD) were studied in cultures by light and electron microscopy. Although they were isolated from gills of different hosts (Dicentrarchus labrax and Scophthalmus maximus) and from distant localities, their morphology was identical. The strains differed from Paramoeba eilhardi, the type species of the genus, in that they lacked the boat-shaped microscales on the cell surface but could be safely identified as belonging to the genus Neoparamoeba Page, 1987. Transmission electron microscopy revealed the presence of a symbiotic organism, Perkinsiella amoebae Hollande, 1980, in all strains under study. The only difference among the strains examined was found in the size of trophozoites, which could be attributed to the different origins of the strains, but until more refined diagnostic methods are available, in addition to N. pemaquidensis, the closely related species N. aestuarina also has to be taken into consideration as the agent of AGD.
Description7 pages, 17 figures.
Publisher version (URL)http://dx.doi.org/10.3354/dao043217
URIhttp://hdl.handle.net/10261/25992
DOI10.3354/dao043217
ISSN0177-5103
Appears in Collections:(IIM) Artículos
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