title: Novel non-motile phenotypes of Yersinia ruckeri suggest expansion of the current clonal complex theory.
abstract: The biochemical and cell surface characteristics of 63 non-motile isolates of Yersinia ruckeri from various sources were compared using the API 20E rapid identification system and conventional phenotypic methods. Eight individual phenotypic groups from a variety of fish species were observed from the data set. Non-motile isolates were not exclusively observed from serogroup O1; membership of biotype 2 was recorded for representatives from serogroups O2-O7. Variations in phenotypes highlights that new clonal groups are arising and that the current typing scheme requires expansion. Previously, it was hypothesized that disease was caused by a few virulent clones; data in this paper suggests that this assumption is not the case. The lipopolysaccharide (O antigen) type in the non-motile biotype was different from other isolates of Y. ruckeri.
authors.affiliation: School of Life Sciences, Heriot-Watt University, Edinburgh, UK.
authors.forename: J W
authors.initials: JW
authors.lastname: Tinsley
authors.forename: D A
authors.initials: DA
authors.lastname: Austin
authors.forename: A R
authors.initials: AR
authors.lastname: Lyndon
authors.forename: B
authors.initials: B
authors.lastname: Austin
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000032:analysis; D015373:Bacterial Typing Techniques; D005393:Fish Diseases / Q000276:immunology / Q000382:microbiology*; D048389:Gadus morhua; D019081:O Antigens / Q000032:analysis; D012474:Salmon; D012703:Serotyping; D014337:Trout; D015009:Yersinia Infections / Q000276:immunology / Q000662:veterinary*; D044124:Yersinia ruckeri / Q000145:classification* / Q000235:genetics / Q000276:immunology
chemical_list: D001425:Bacterial Outer Membrane Proteins; D019081:O Antigens