438
Characteristics of the Pathogen
Epizootiology
It was considered that the feeding habits of gray mullet, which include detritus, dead
plant material and zooplankton, may be an important source of Myroides (Ravindran
et al. 2015 ).
Pathogenicity
The LC 50 dose was 1.3 × 10
6 CFU/fi sh (Ravindran et al. 2015 ).
Tenacibaculum spp.
Characteristics of the Disease
There has been a report of the involvement of a diffi cult-to-isolate Tenacibaculum
with winter ulcers in Atlantic salmon in Norway (Olsen et al. 2011 ).
Characteristics of the Pathogen
The fatty acid methyl esters (FAMEs) of T. gallaicum, T. maritimum, T. ovolyticum
and T. dicolor were different in terms of iso-C 15:0 3- OH, iso-C 16:0 3-OH, iso-C 15:1 OH,
summed feature 3 (a component that contains C 16:1 ω7c and ⁄ or iso-C 15:0 2-OH), isoC 16:0 , C 17:1 ω6c, C 15:0 3-OH and iso-C 17:0 3- OH (Piñeiro-Vidal et al. 2008a ).
Box 7.15: Myroides odoratimimus
Colonies are yellow-orange, circular and convex with entire margins, and
contain aerobic Gram-negative nonmotile rods that produce catalase and oxidase, but not H 2 S. Sequencing of the 16S rRNA gene led the authors to report
a close relationship (= high sequence similarity) to Myroides odoratimimus
(Ravindran et al. 2015 ).
7 Flavobacteria and Cytophagas
Characteristics of the Pathogen
Epizootiology
It was considered that the feeding habits of gray mullet, which include detritus, dead
plant material and zooplankton, may be an important source of Myroides (Ravindran
et al. 2015 ).
Pathogenicity
The LC 50 dose was 1.3 × 10
6 CFU/fi sh (Ravindran et al. 2015 ).
Tenacibaculum spp.
Characteristics of the Disease
There has been a report of the involvement of a diffi cult-to-isolate Tenacibaculum
with winter ulcers in Atlantic salmon in Norway (Olsen et al. 2011 ).
Characteristics of the Pathogen
The fatty acid methyl esters (FAMEs) of T. gallaicum, T. maritimum, T. ovolyticum
and T. dicolor were different in terms of iso-C 15:0 3- OH, iso-C 16:0 3-OH, iso-C 15:1 OH,
summed feature 3 (a component that contains C 16:1 ω7c and ⁄ or iso-C 15:0 2-OH), isoC 16:0 , C 17:1 ω6c, C 15:0 3-OH and iso-C 17:0 3- OH (Piñeiro-Vidal et al. 2008a ).
Box 7.15: Myroides odoratimimus
Colonies are yellow-orange, circular and convex with entire margins, and
contain aerobic Gram-negative nonmotile rods that produce catalase and oxidase, but not H 2 S. Sequencing of the 16S rRNA gene led the authors to report
a close relationship (= high sequence similarity) to Myroides odoratimimus
(Ravindran et al. 2015 ).
7 Flavobacteria and Cytophagas