Characterization of 'Candidatus Syngnamydia salmonis' (Chlamydiales, Simkaniaceae), a bacterium associated with epitheliocystis in Atlantic salmon (Salmo salar L.).
Arch Microbiol
; 197(1): 17-25, 2015 Jan.
Article
em En
| MEDLINE
| ID: mdl-25294188
ABSTRACT
Two Chlamydiales have previously been found to infect Atlantic salmon (Salmo salar L.), Candidatus Piscichlamydia salmonis and Candidatus Clavichlamydia salmonicola. Both develop intracellularly in cyst-like inclusions in gill cells, generally referred to as epitheliocysts. Here, we present evidence for the association of a novel species of Chlamydiales with epitheliocystis in Atlantic salmon. Based on its partial 16S rRNA gene sequence, it is a new member of the family Simkaniaceae, and a 95.7 % identity to the type species Candidatus Syngnamydia venezia suggests inclusion in the candidate genus Syngnamydia. The presence of the bacterium in epitheliocysts in gills of Atlantic salmon was demonstrated by RNA-RNA hybridization. Ultrastructurally, the novel bacterium produces pleomorphic reticulate bodies and elementary bodies (EBs) with a characteristic morphology. The EBs are short rods with a terminal disc-like cap area, a sub-apical spherical vacuole-like electron-lucent structure and a post-equatorial nucleoid. We propose the name Candidatus Syngnamydia salmonis for this new agent from epitheliocysts in seawater-reared salmon .
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Corpos de Inclusão
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Chlamydiales
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Infecções por Bactérias Gram-Negativas
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Salmo salar
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Doenças dos Peixes
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Brânquias
Tipo de estudo:
Risk_factors_studies
Limite:
Animals
Idioma:
En
Revista:
Arch Microbiol
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Noruega