Legionella maioricensis sp. nov., a new species isolated from the hot water distribution systems of a hospital and a shopping center during routine sampling
Two -like strains isolated from hot water distribution systems in 2012 have been characterized phenotypically, biochemically and genomically in terms of DNA relatedness. Both strains, HCPI-6 and EUR-108, exhibited biochemical phenotypic profiles typical of species. Cells were Gram-negative motile ro...
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Published in | International journal of systematic and evolutionary microbiology Vol. 73; no. 1 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
01.02.2023
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Subjects | |
Online Access | Get more information |
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Summary: | Two
-like strains isolated from hot water distribution systems in 2012 have been characterized phenotypically, biochemically and genomically in terms of DNA relatedness. Both strains, HCPI-6
and EUR-108, exhibited biochemical phenotypic profiles typical of
species. Cells were Gram-negative motile rods which grew on BCYEα agar but not on blood agar and displayed phenotypic characteristics typical of the family
, including a requirement for l-cysteine and testing catalase positive. Both strains were negative for oxidase, urease, nitrate reduction and hippurate negative, and non-fermentative. The major ubiquinone was Q12 (59.4 % HCPI-6
) and the dominant fatty acids were C
ω7
(28.4 % HCPI-6
, ≈16 % EUR-108), C
iso (≈22.5 % and ≈13 %) and C
anteiso (19.5 % and ≈23.5 %, respectively). The percent G+C content of genomic DNA was determined to be 39.3 mol %. The 16S rRNA gene,
sequence and comparative genome sequence-based analyses (average nucleotide identity, ANI; digital DNA-DNA hybridization, dDDH; and phylogenomic treeing) demonstrated that the strains represent a new species of the genus
. The analysis based on the 16S rRNA gene sequences showed that the sequence similarities for both strains ranged from 98.8-90.1 % to other members of the genus. The core genome-based phylogenomic tree (protein-concatemer tree based on concatenation of 418 proteins present in single copy) revealed that these two strains clearly form a separate cluster within the genus
. ANI and dDDH values confirmed the distinctiveness of the strains. Based on the genomic, genotypic and phenotypic findings from a polyphasic study, the isolates are considered to represent a single novel species, for which the name
sp. nov. is proposed. The type strain is HCPI-6
(=CCUG 75071
=CECT 30569
). |
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ISSN: | 1466-5034 |
DOI: | 10.1099/ijsem.0.005686 |