Proposal of Helicobacter canicola sp. nov., previously identified as Helicobacter cinaedi, isolated from canines

Kawamura, Y.; Tomida, Junko; Miyoshi‐Akiyama, Tohru; Okamoto, Tatsuya; Narita, Masashi; Hashimoto, Katsuhiko; Cnockaert, Margo; Vandamme, Peter; Morita, Yuji; Sawa, Tomohiro; Akaike, Takaaki

doi:10.1016/j.syapm.2016.06.004

Cited by 22 publications

(28 citation statements)

References 38 publications

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“…However, the biochemical characteristics of nitrate reduction, alkaline phosphatase production and esterase activity were different from those of H. cinaedi . To confirm the identification, the gyrA gene of the isolate was sequenced (2450 bp) and the deduced protein sequence (811 residues) used to determine the phylogenetic relationship with the GyrA protein of H. fennelliae CCUG 18820 T , whose sequence was obtained from a public database (Ménard et al , 2016; Kawamura et al , 2016). In the phylogenetic analysis based on GyrA sequences, the isolate (HF-1; accession no.…”

Section: Case Reportmentioning

confidence: 99%

Successful treatment of recurrent Helicobacter fennelliae bacteraemia by selective digestive decontamination with kanamycin in a lung cancer patient receiving chemotherapy

et al. 2016

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Introduction:Helicobacter fennelliae is an enterohepatic Helicobacter species causing bacteraemia in immunocompromised hosts. Only a few cases of recurrent H. fennelliae bacteraemia have been reported in Japan and there are no guidelines regarding antimicrobial treatment for H. fennelliae infection.Case presentation:H. fennelliae bacteraemia was observed in a patient receiving platinum-based chemotherapy for lung cancer. To prevent recurrence, the patient received antibiotic therapy with cefepime, amoxicillin and doxycycline for 6 weeks, which is similar to the therapy for Helicobacter cinaedi bacteraemia. Bacteraemia recurred despite the long-term antibiotic therapy. We hypothesized that the H. fennelliae bacteraemia originated from endogenous infection in the intestinal tract due to the long-term damage of the enteric mucosa by platinum-based drugs and performed selective digestive decontamination (SDD) with kanamycin. Bacteraemia did not recur after SDD.Conclusion:Our observations indicate that clinicians should be aware of possible recurrent H. fennelliae bacteraemia, which could be effectively prevented by SDD with kanamycin.

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Section: Case Reportmentioning

confidence: 99%

Successful treatment of recurrent Helicobacter fennelliae bacteraemia by selective digestive decontamination with kanamycin in a lung cancer patient receiving chemotherapy

et al. 2016

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“…Bacterial cell shape and size were determined using a scanning electron microscope (JXA‐8530FA; JEOL, Tokyo, Japan) as described previously . Motility and Gram staining were observed by phase‐contrast light microscopy (Nikon ECLIPSE 80i; Nikon, Tokyo, Japan) .…”

Section: Methodsmentioning

confidence: 99%

“…Genomic DNA was extracted from each strain using a MORA EXTRACT kit (Kyokuto, Tokyo, Japan). PCR amplification targeting the 16S rRNA gene was carried out and the gene sequence of each amplicon determined . Multiple alignments of the DNA sequences was performed using Clustal X software, and phylogenetic distances and clustering were calculated using a neighbor‐joining method .…”

Section: Methodsmentioning

confidence: 99%

Description of Paraclostridium bifermentans subsp. muricolitidis subsp. nov., emended description of Paraclostridium bifermentans (Sasi Jyothsna et al., 2016), and creation of Paraclostridium bifermentans subsp. bifermentans subsp. nov

Kutsuna

Miyoshi‐Akiyama

Mori

et al. 2019

Microbiology and Immunology

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Taxonomic studies of strain PAGU 1678T, an obligately anaerobic, gram‐positive, spore‐forming bacterium isolated from biobreeding rat feces, were performed. This strain has been demonstrated to have the ability to exacerbate pathosis in a mouse model of dextran sulfate sodium‐induced ulcerative colitis. Phylogenetic analysis based on the 16S rRNA gene showed high homology with Paraclostridium bifermentans. To clarify the correct taxonomic position of strain PAGU 1678T, a comparative taxonomic study using P. bifermentans PAGU 2008T (═JCM 1386T) and the closely related bacterial species P. benzoelyticum PAGU 2068T (═LMG 28745T) was carried out. Despite the close similarity of 16S rRNA gene sequences, DNA‐DNA hybridization between strain PAGU 1678T and P. bifermentans PAGU 2008T was 60.03% on average, average nucleotide identity was 96.17%, and it was shown to have different genomic sequences. Biochemically, strain PAGU 1678T could be differentiated from P. bifermentans PAGU 2008T by H2S production. Furthermore, strain PAGU 1678T was characterized by the presence of two phospholipids with different polarity on polar lipid analysis. In addition, strain PAGU 1678T differed from P. bifermentans PAGU 2008T in findings on whole‐cell protein analysis and matrix‐assisted laser desorption/ionization‐time of flight mass spectrometry. On the basis of these biochemical and genetic characteristics, a novel subspecies of P. bifermentans with the name Paraclostridium bifermentans subsp. muricolitidis subsp. nov. is here proposed, with PAGU 1678T (═CCUG 72489T ═NBRC 113386T) as the type strain, which automatically creates P. bifermentans subsp. bifermentans subsp. nov. JCM 1386T (═ATCC 638T ═DSM 14991T).

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“…nov., isolated from canine feces, was previously misidentified as Helicobacter cinaedi . However, it exhibited different biochemical traits and phylogenetic analyses (16S rRNA, 23S rRNA, gyrB , and hsp60 gene sequences), confirmed that this bacterium form a distinct cluster . A putative novel Helicobacter species, “ Helicobacter japonicum” sp.…”

Section: Taxonomy Prevalence and Diagnosis Of Non‐helicobacter Pylomentioning

confidence: 95%

“…However, it exhibited different biochemical traits and phylogenetic analyses (16S rRNA, 23S rRNA, gyrB, and hsp60 gene sequences), confirmed that this bacterium form a distinct cluster. 4 A putative novel Helicobacter species, "Helicobacter japonicum" sp. nov., was isolated from the stomach and intestines of clinically normal mice.…”

Section: Taxonomy Prevalence and Diagnosis Of Non-helicobacter Pymentioning

confidence: 99%

Other Helicobacters, gastric and gut microbiota

et al. 2017

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The current article is a review of the most important and relevant literature published in 2016 and early 2017 on non-Helicobacter pylori Helicobacter infections in humans and animals, as well as interactions between H. pylori and the microbiota of the stomach and other organs. Some putative new Helicobacter species were identified in sea otters, wild boars, dogs, and mice. Many cases of Helicobacter fennelliae and Helicobacter cinaedi infection have been reported in humans, mostly in immunocompromised patients. Mouse models have been used frequently as a model to investigate human Helicobacter infection, although some studies have investigated the pathogenesis of Helicobacters in their natural host, as was the case for Helicobacter suis infection in pigs. Our understanding of both the gastric and gut microbiome has made progress and, in addition, interactions between H. pylori and the microbiome were demonstrated to go beyond the stomach. Some new approaches of preventing Helicobacter infection or its related pathologies were investigated and, in this respect, the probiotic properties of Saccharomyces, Lactobacillus and Bifidobacterium spp. were confirmed.

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Proposal of Helicobacter canicola sp. nov., previously identified as Helicobacter cinaedi, isolated from canines

Cited by 22 publications

References 38 publications

Successful treatment of recurrent Helicobacter fennelliae bacteraemia by selective digestive decontamination with kanamycin in a lung cancer patient receiving chemotherapy

Successful treatment of recurrent Helicobacter fennelliae bacteraemia by selective digestive decontamination with kanamycin in a lung cancer patient receiving chemotherapy

Description of Paraclostridium bifermentans subsp. muricolitidis subsp. nov., emended description of Paraclostridium bifermentans (Sasi Jyothsna et al., 2016), and creation of Paraclostridium bifermentans subsp. bifermentans subsp. nov

Other Helicobacters, gastric and gut microbiota

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