NUMERICAL TAXONOMY AND BIOCHEMICAL-IDENTIFICATION OF FISH ASSOCIATED MOTILE AEROMONAS SPP

Citation
L. Noterdaeme et al., NUMERICAL TAXONOMY AND BIOCHEMICAL-IDENTIFICATION OF FISH ASSOCIATED MOTILE AEROMONAS SPP, Systematic and applied microbiology, 19(4), 1996, pp. 624-633
Citations number
44
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Microbiology,"Biothechnology & Applied Migrobiology
ISSN journal
0723-2020
Volume
19
Issue
4
Year of publication
1996
Pages
624 - 633
Database
ISI
SICI code
0723-2020(1996)19:4<624:NTABOF>2.0.ZU;2-8
Abstract
Four hundred and thirty-right Aeromonas, 31 Vibrio and 3 Plesiomonas s trains isolated from moribund and healthy fish, water samples and huma ns, including 36 reference strains, were compared using numerical taxo nomy based on 128 unit characters. Data were examined by the simple ma tching (S-SM) and Jaccard (S-J) coefficients, and by unweighted averag e linkage clustering. As expected, Aeromonas spp. were clearly distinc t from those of Vibrio and Plesiomonas. The motile Aeronomas spp., i. e. Aeromonas hydrophila, Aeromonas caviae and Aeromonas veronii biotyp e sobria formed discrete homogeneous clusters, distinct from the nonmo tile species Aeromonas salmonicida. Furthermore, A. caviae was divided into two biotypes with D-mannose fermentation as the most important d ifferentiating characteristic. Of the recently described species, A. v eronii biotype veronii (type strain ATCC 35624) was phenotypically clo sest to A. hydrophila, although from DNA:DNA hybridisation studies it was classified within the A. sobria group. Aeromonas schubertii (type strain ATCC 43 700) was well defined and formed a single member cluste r The phenotypic boundaries of Aeromonas media (type strain ATCC 33907 ) and Aeromonas eucrenophila (type strain CDC 0859-83) were not clear. All the fish isolates (n = 208) were identified, with A. hydrophila p redominating (43.8%), followed by A. veronii biotype sobria (26.9%), A . caviae biotype I (16.3%), A, salmonicida (6.7%), A, sobria (HG7) (2. 9%), A. caviae biotype II (2.4%), and A. veronii biotype veronii (1%).