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Helicobacter cinaedi

Jonathan E Schmitz, Takako Taniguchi, Naoaki Misawa, Timothy L Cover
: Helicobacter cinaedi is an emerging opportunistic pathogen associated with infections of diverse anatomic sites. Nevertheless, the species demonstrates fastidious axenic growth-it is described as requiring a microaerobic atmosphere, along with a strong preference for supplemental H2-gas. In this context, we examined the hypothesis that in vitro growth of H. cinaedi could be enhanced by co-culture with human epithelial cells. When inoculated (in Ham's F12) over Caco-2 monolayers, the type strain (ATCC BAA-847(T)) gained the ability to proliferate under H2-free aerobic conditions...
September 9, 2016: Applied and Environmental Microbiology
Chloë De Witte, Christian Schulz, Annemieke Smet, Peter Malfertheiner, Freddy Haesebrouck
This article aimed to review the literature from 2015 dealing with gastric and enterohepatic non-Helicobacter pylori Helicobacter species (NHPH). A summary of the gastric microbiota interactions with H. pylori is also presented. An extensive number of studies were published during the last year and have led to a better understanding of the pathogenesis of infections with NHPH. These infections are increasingly reported in human patients, including infections with H. cinaedi, mainly characterized by severe bacteremia...
September 2016: Helicobacter
Z Laftah, R Hay
No abstract text is available yet for this article.
July 2016: British Journal of Dermatology
Ayush Puri, Arshiya Rai, P S Dhanaraj, Rup Lal, Dev Dutt Patel, Anju Kaicker, Mansi Verma
Helicobacter is an economically important genus within the phylum Proteobacteria and include many species which cause many diseases in humans. With the conventional methods, it is difficult to identify them easily due to the high genetic similarity among its species. In the present study, 361 16S rRNA (rrs) gene sequences belonging to 45 species of genus Helicobacter were analyzed. Out of these, 264 sequences of 10 clinically relevant species (including Helicobacter pylori) were used. rrs gene sequences were analyzed to obtain a phylogenetic framework tree, in silico restriction enzyme analysis and species-specific conserved motifs...
September 2016: Indian Journal of Microbiology
Yoshiaki Kawamura, Junko Tomida, Tohru Miyoshi-Akiyama, Tatsuya Okamoto, Masashi Narita, Katsuhiko Hashimoto, Margo Cnockaert, Peter Vandamme, Yuji Morita, Tomohiro Sawa, Takaaki Akaike
During the course of our taxonomic investigation of Helicobacter cinaedi, it was realized that the strains isolated from dogs, which have been identified as H. cinaedi, showed different biochemical traits than did the isolates obtained from humans. None of the three dog isolates could reduce nitrate to nitrite, whereas all of the human H. cinaedi isolates could do so. The dog isolates showed a strong positive alkaline phosphatase reaction and could grow at 42°C, however the human isolates showed negative to very weak responses to those tests...
July 2016: Systematic and Applied Microbiology
Masatoshi Akiyama, Yukihiro Hayatsu, Ko Sakatsume, Hidenori Fujiwara, Takuya Shimizu, Daijirou Akamatsu, Risako Kakuta, Yoshiaki Gu, Mitsuo Kaku, Kiichiro Kumagai, Shunsuke Kawamoto, Hitoshi Goto, Noriaki Ohuchi, Yoshikatsu Saiki
Patients supported by mechanical circulatory support have to wait for longer periods for heart transplantation in Japan. Infective events are a major complication and influence survival. Here, we present the case of a patient with an implantable left ventricular assist device for 6 months who had the complication of ruptured infective common iliac aneurysm. Graft placement with an omental flap was successfully performed via the alternative surgical approach to avoid percutaneous driveline injury. In samples of aortic specimens, 16S ribosomal DNA gene analysis identified Helicobacter cinaedi...
July 5, 2016: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
Masayo Sugimoto, Takuya Takeichi, Hideki Muramatsu, Daiei Kojima, Yukari Osada, Michihiro Kono, Seiji Kojima, Masashi Akiyama
is missing (Short communication).
July 5, 2016: Acta Dermato-venereologica
Soichiro Abiko, Itaru Nakamura, Yoshiko Yamaguchi, Kiyofumi Ohkusu, Yoji Hirayama, Tetsuya Matsumoto
We report the first case of cerebral cyst infection of H. cinaedi, a fastidious spiral-shaped gram-negative rod bacterium.A 70-year-old man visited our hospital with a fever persisting for 2 weeks. He had received surgery and radiotherapy for parapharyngeal space squamous cell carcinoma 10 years ago. The radiotherapy had resulted in a cerebral cyst as a side effect, and an Ommaya reservoir had been inserted into the cyst. Blood culture and analysis of the brain cyst fluid revealed the presence of spiral-shaped gram-negative rod bacteria, which were identified as Helicobacter cinaedi by polymerase chain reaction...
June 30, 2016: Japanese Journal of Infectious Diseases
Yuichi Shimizu, Harumi Gomi, Haruhiko Ishioka, Momoko Isono
Helicobacter cinaedi is known to cause bacteremia with multi-focal cellulitis, usually, among immunocompromised patients. We report here a 54-year-old Japanese man who was found to have bacteremia complicated with bilateral lower extremities cellulitis due to H. cinaedi. This patient did not have any immunocompromised conditions including Human Immunodeficiency Virus infection. In this patient, the cellulitis was multi-focal which is rare among immunocompetent patients. In addition, interestingly, the cellulitis was symmetrically on the both sides on the lower dorsal part of the extremities...
2016: IDCases
Sho Saito, Mika Tsukahara, Kiyofumi Ohkusu, Hanako Kurai
Helicobacter fennelliae is a gram-negative, spiral bacillus that appears as thin-spread colonies on sheep blood agar and is similar to Helicobacter cinaedi. H fennelliae is diagnosed by genetic testing, which is not readily available in all laboratories. Therefore, H fennelliae bacteremia has only been reported sporadically, and little is known about its clinical characteristics.We describe 3 cases of H fennelliae bacteremia with gastrointestinal symptoms, including nausea, vomiting, and diarrhea. Isolates could be differentiated from H cinaedi by biochemical reaction testing, including nitrate reduction and alkaline phosphatase hydrolysis...
May 2016: Medicine (Baltimore)
Meiwa Toyofuku, Junko Tomida, Yoshiaki Kawamura, Ippei Miyata, Yuki Yuza, Yuho Horikoshi
This is the first report of penicillin/cephalosporin-resistant Helicobacter cinaedi arising from prolonged treatment. H. cinaedi, common among immunocompromised patients, caused recurrent bacteremia and cellulitis in a 19-year-old Japanese man with X-linked agammaglobulinemia. The minimal inhibitory concentration of these drugs was raised, which subsequently resulted in clinical failure. Prolonged suboptimal treatment may cause bacterial resistance to β-lactam antibiotics in H. cinaedi. It is possible that this resistance may have contributed to the treatment failure...
October 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
Kazuhiro Nishida, Takamasa Iwasawa, Atsushi Tamura, Alan T Lefor
Helicobacter cinaedi is a rare human pathogen which has various clinical manifestations such as cellulitis, bacteremia, arthritis, meningitis, and infectious endocarditis. We report an abdominal aortic aneurysm infected with Helicobacter cinaedi, treated successfully with surgical repair and long-term antimicrobial therapy.
2016: Case Reports in Surgery
Armelle Ménard, Alice Buissonnière, Valérie Prouzet-Mauléon, Elodie Sifré, Francis Mégraud
Phylogeny of Epsilonproteobacteria is based on sequencing of the 16S rRNA gene. However, this gene is not sufficiently discriminatory in Helicobacter species and alternative markers would be useful. In this study, the 16S rRNA, gyrA, hsp60, gyrB, and ureA-ureB gene sequences, as well as GyrA, HSP60 and GyrB protein sequences were analyzed as tools to support Helicobacter species phylogeny: 72 Helicobacter strains, belonging to 41 species of which 36 are validated species, were included. Results of the phylogenetic reconstructions of the GyrA gene encoded protein (approximately 730 residues) indicated the most stable trees to bootstrap resampling with a good separation of Helicobacter taxa, especially between gastric and enterohepatic species...
March 2016: Systematic and Applied Microbiology
Yohei Maki, Seishi Furukawa, Yuki Kodama, Kaeko Sumiyoshi, Emi Kino, Hiroshi Sameshima
Helicobacter cinaedi is a rare pathogen but known to cause bacteremia, cellulitis and enterocolitis. Recently, cases of involving various organs are increasingly reported such as endocarditis, meningitis, and kidney cyst infection. We report a case of intrauterine H. cinaedi infection leading preterm birth and neonatal sepsis. A 29-year-old pregnant women who was no underlying disease hospitalized due to threatened preterm labor at 22 weeks of gestation. Clinical findings showed uterine tenderness, fever, leukocytosis and elevated C-reactive protein...
June 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
Takako Taniguchi, Wataru Yamazaki, Yuji Saeki, Ichiro Takajo, Akihiko Okayama, Tetsuya Hayashi, Naoaki Misawa
Helicobacter cinaedi infection has been recognized as an increasingly important emerging disease in humans. Infection with H. cinaedi causes bacteremia, cellulitis and enteritis. H. cinaedi has been isolated from non-human sources, including dogs, cats and rodents; however, it remains unclear whether animal strains are pathogenic in humans and as zoonotic pathogens. In this study, H. cinaedi isolates were recovered from a dog and a hamster, and the ability of these isolates to adhere to, invade and translocate across polarized human intestinal epithelial Caco-2 cells was examined in vitro...
May 3, 2016: Journal of Veterinary Medical Science
S Shimizu, H Shimizu
Helicobacter cinaedi is an emerging Gram-negative spiral bacillus that was first reported in 1984. It has been implicated as a cause of gastroenteritis and bacteraemia in immunocompromised individuals. Helicobacter cinaedi-associated bacteraemia is sometimes accompanied by skin lesions; however, the cutaneous manifestations of this pathogen are not widely known. To our knowledge, a comprehensive review with detailed analysis of skin lesions associated with H. cinaedi has not been conducted. This article summarizes the clinical appearance of H...
July 2016: British Journal of Dermatology
Itaru Nakamura, Kiyofumi Ohkusu, Yoshihiro Nakagami, Masaaki Tachibana, Tetsuya Matsumoto
A case of bacteremia caused by a rare Helicobacter species, Campylobacter-like organism 3 (CLO-3), in a 75-year-old man with prostate cancer and an indwelling urethral catheter for urinary retention, is reported. Oral levofloxacin (500mg per day) was effective, although the results of antimicrobial susceptibility testing were unknown. Non-film-like, small, clear colonies were isolated on blood agar after 72h of microaerobic incubation at 37°C. Biochemical testing indicated that the isolates were catalase-positive, negative for nitrate reduction and urease activity, and positive for indoxyl acetate hydrolysis...
January 2016: International Journal of Infectious Diseases: IJID
A Imafuku, H Araoka, K Tanaka, Y Marui, N Sawa, Y Ubara, K Takaichi, Y Ishii, S Tomikawa
Helicobacter cinaedi can cause bacteremia mainly in immunocompromised patients. We present the clinical characteristics of H. cinaedi bacteremia in 4 renal transplant patients. Interestingly, all cases showed triggers of bacterial translocation: 2 cases developed after colonic perforation caused by diverticulitis, 1 case developed post cholecystectomy, and the remaining patient had chronic diarrhea. Accordingly, bacterial translocation caused by severe gastrointestinal complication could be a cause of H. cinaedi bacteremia...
February 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
Hans Linde Nielsen, Jørgen Prag, Karen Angeliki Krogfelt
An otherwise healthy 36-year-old man was hospitalised due to a traumatic tear of the meniscus in the left knee. An arthroscopy was performed and his meniscus was partially resected. Thirty days later, he was rehospitalised with arthritis in the left knee and cellulitis on the left tibia. Helicobacter cinaedi was isolated from the synovial fluid, which was incubated in a BACTEC Paediatric bottle. The patient was treated with oral rifampicin and moxifloxacin for 6 weeks with good clinical response without relapse...
2015: BMJ Case Reports
Bram Flahou, Emiko Rimbara, Shigetarou Mori, Freddy Haesebrouck, Keigo Shibayama
In the past year, a substantial number of (putative) novel Helicobacter species have been described, including Helicobacter himalayensis colonizing the Himalayan marmot and Helicobacter apodemus, colonizing the Korean striped field mouse. In addition, a putative novel gastric Helicobacter species was identified in wild gorillas and chimpanzees, for which the name "Candidatus H. homininae" was proposed. A high incidence of gastric non-H. pylori Helicobacter infection was described in China and multiple case reports have described the involvement of enterohepatic Helicobacter species, especially Helicobacter cinaedi, in a wide range of diseases...
September 2015: Helicobacter
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