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1 Laboratory of Rickettsial and Zoonotic Disease, Department of Microbiology, Korean National Institute of Health, Seoul 122-701, Korea
2 Department of Microbiology and Cancer Research Institute, Institute of Endemic Diseases, SNUMRC, Seoul National University College of Medicine and Clinical Research Institute, Seoul National University Hospital, Seoul 110-799, Korea
Correspondence
Yoon-Hoh Kook
yhkook{at}plaza.snu.ac.kr
Three Legionella-like micro-organisms, isolated from cooling tower water of a building in Busan, Korea, were characterized by a variety of biochemical and molecular phylogenetic tests. Analyses of whole-cell fatty acids and results of biochemical tests revealed that these three isolates are distinct from previously described Legionella species. Furthermore, results of comparative analyses of 16S rDNA (1476–1488 bp), mip (408 bp) and rpoB (300 bp) sequences also confirmed that these strains represent a novel species within the genus Legionella. The 16S rDNA sequences of the three Korean isolates had similarities of less than 95·8 % to other Legionella species. Phylogenetic trees formed by analysis of the 16S rRNA, rpoB and mip genes revealed that the isolates formed a distinct cluster within the genus Legionella. Based on the evaluated phenotypic and phylogenetic characteristics, it is proposed that these Korean isolates from water be classified as a novel species, Legionella busanensis sp. nov.; the type strain is strain K9951T (=KCTC 12084T =ATCC BAA-518T).
The GenBank accession numbers for the 16S rDNA, rpoB and mip sequences of strain K9951T are AF424887–AF424889.
An rpoB-based dendrogram including a wider selection of Legionella type strains is available as supplementary material in IJSEM Online (http://ijs.sgmjournals.org/).
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