Article Abstract:
The strains of the pathogenic bacteria Enterococcus isolated from infected turbot are specific for turbot and are nonpathogenic for the fish species salmon, trout and seabream and for mice. The virulence of Enterococcus in turbot is high. Horizontally transmissions of the bacteria through water via an abraded skin or the fecal-oral pathway cause infections in the fish. The resistance in noninjured fish is due to the glycoproteins in the skin mucus. The bacteria is able to survive in the stomach if it is associated with food or fecal matter. Infection can also be caused by a contaminated diet.
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Article Abstract:
Twenty-two strains of Vibrio tapetis were compared and examined in a study of strain heterogeneity utilizing pulsed-field gel electrophoresis (PFGE), ribotyping and plasmid profile analysis. A total of 90.9% of the V. tapetis strains had the same PFGE pattern composed of 15 bands. On the other hand, V. tapetis strains had a low degree of similarity with six reference Vibrio species tested. All v. tapetis strains contained a large plasmid of 74.5 kb. This plasmid was not found in any of the other Vibrio species.
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Article Abstract:
The first evidence of the presence of iron uptake mechanisms in the bacterial fish pathogen Tenacibaculum maritimum is presented. Results suggest that T. maritimum possesses at least two different systems of iron acquisition, one involving the synthesis of siderophores and another that allows the utilization of heme groups as iron sources by direct binding.
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