Bibliographic Details
| Title: |
Proposal of Helicobacter higonensis sp. nov. isolated from a human clinical specimen, and emended description of Helicobacter valdiviensis Collado, 2014. |
| Authors: |
Tomida, Junko, Miyoshi‐Akiyama, Tohru, Kutsuna, Ryo, Tsutsuki, Hiroyasu, Sawa, Tomohiro, Cnockaert, Margo, Vandamme, Peter, Kawamura, Yoshiaki |
| Source: |
Microbiology & Immunology; Jun2024, Vol. 68 Issue 6, p197-205, 9p |
| Subject Terms: |
AMINO acid sequence, HELICOBACTER, NITRATE reductase, DENITRIFICATION, GRAM-negative bacteria |
| Geographic Terms: |
KUMAMOTO-ken (Japan), JAPAN |
| Abstract: |
We have previously isolated a gram‐negative microaerophilic strain, PAGU2000T from a patient presenting with a fever in Kumamoto Prefecture, Japan. The present study aimed to comprehensively analyze the taxonomy of the isolated strain using a polyphasic approach. The 16S rRNA gene sequence analysis indicated that the strain was a member of enterohepatic Helicobacter. The strain PAGU2000T shared a 97.5% 16S rRNA gene nucleotide identity with Helicobacter valdiviensis, and this taxonomic position was confirmed by phylogenetic analysis of the GyrA amino acid sequences. The proposed strain PAGU2000T has a 1.482 Mbp chromosome with a DNA G + C content of 31.3 mol% and encodes 1520 predicted coding sequences. The average nucleotide identity between the strain PAGU2000T and type strain of H. valdiviensis was 70.3%, which was lower than the recommended threshold of 95% for species delineation. The strain PAGU2000T was a motile, non‐spore‐forming, and spiral‐shaped bacterium, exhibiting catalase and oxidase activities but not urease and nitrate reduction. This study demonstrates that the isolate represents a novel species within enterohepatic Helicobacter, for which the name Helicobacter higonensis is proposed (type strain: PAGU2000T = GTC 16811T = LMG 33095T). In this study, we describe the phenotypic and morphological features of this strain and propose an emended description of some biochemical traits of H. valdiviensis. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
