title: Genetic diversity among A-proteins of atypical strains of Aeromonas salmonicida.
abstract: The virulence array protein gene A (vapA) encoding the A-protein subunit of the surface layer of 23 typical and atypical strains of Aeromonas salmonicida from salmonids and marine fish species were sequenced, and the deduced A-protein sequences compared. The A-proteins of the typical A. salmonicida ssp. salmonicida strains were shown to be identical, while amino acid variability was revealed among A-proteins of atypical strains. The highest amino acid variability appears to be in a predicted surface exposed region and is believed to result in antigenic differences among the atypical strains of A. salmonicida.
authors.affiliation: Fiskeriforskning, Norwegian Institute of Fisheries and Aquaculture Research, 9291 Tromsø, Norway. vera.lund@fiskeriforskning.no
authors.forename: Vera
authors.initials: V
authors.lastname: Lund
authors.forename: Helene
authors.initials: H
authors.lastname: Mikkelsen
mesh_terms: D048409:Aeromonas salmonicida / Q000235:genetics*; D000595:Amino Acid Sequence; D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D016000:Cluster Analysis; D005399:Fishes / Q000382:microbiology*; D014644:Genetic Variation; D008969:Molecular Sequence Data; D010802:Phylogeny; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D037521:Virulence Factors / Q000235:genetics*
chemical_list: D001426:Bacterial Proteins; D037521:Virulence Factors