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H. Cinaedi

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https://www.readbyqxmd.com/read/29232796/-four-cases-of-bacteremia-caused-by-helicobacter-cinaedi-in-the-urological-ward-at-about-the-same-time
#1
Yoshiki Hiyama, Satoshi Takahashi, Naotaka Nishiyama, Mami Nakae, Satoshi Fujii, Masaaki Shinagawa, Naoya Masumori
Here we report the outbreak of bacteremia caused by Helicobacter cinaedi (H. cinaedi) in the urology ward. Case 1 was a man in his seventies with prostate cancer. Bacteremia caused by H. cinaedi developed 6 days after robot-assisted radical prostatectomy. Case 2 was a man in his sixties with small cell carcinoma of the prostate. Bacteremia developed at 5 days of docetaxel therapy. Case 3 was a man in his fifties with left renal pelvis carcinoma. Bacteremia developed 3 days after laparoscopic left nephroureterectomy...
November 2017: Hinyokika Kiyo. Acta Urologica Japonica
https://www.readbyqxmd.com/read/29218758/first-evidence-of-bacterial-translocation-from-the-intestinal-tract-as-a-route-of-helicobacter-cinaedi-bacteremia
#2
Hideki Araoka, Masaru Baba, Chikako Okada, Muneyoshi Kimura, Tomoaki Sato, Yutaka Yatomi, Kyoji Moriya, Akiko Yoneyama
BACKGROUND: The route of Helicobacter cinaedi bacteremia has not yet been clarified. Although bacterial translocation from the intestinal tract into the circulation has been suggested, it has not been demonstrated thus far. The objective of this study was to investigate the port of entry of this bacterium. MATERIAL AND METHODS: We conducted a retrospective study on patients with H. cinaedi bacteremia between March 2009 and May 2013. Records of patients in whom H...
December 8, 2017: Helicobacter
https://www.readbyqxmd.com/read/29203490/mutations-in-genes-encoding-penicillin-binding-proteins-and-efflux-pumps-play-a-role-in-%C3%AE-lactam-resistance-in-helicobacter-cinaedi
#3
Emiko Rimbara, Shigetarou Mori, Hyun Kim, Masato Suzuki, Keigo Shibayama
β-Lactams are often used to treat Helicobacter cinaedi infections; however, the mechanism underlying β-lactam resistance is unknown. In this study, we investigated β-lactam resistance in a H. cinaedi strain, MRY12-0051 (MIC of AMX and CRO: 32 and 128 μg/ml; obtained from human feces). Based on a comparative whole genome analysis of MRY12-0051 and the CRO-susceptible H. cinaedi strain MRY08-1234 (MIC of AMX and CRO: 1 and 4 μg/ml; obtained from human blood), we identified five mutations in genes encoding penicillin-binding proteins (PBPs), including two in pbpA, one in pbp2, and two in ftsI Transformation and penicillin-binding assays indicated that CRO resistance was mainly associated with mutations in pbpA; mutations in ftsI also led to increased resistance to AMX...
December 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29110387/cholesterol-%C3%AE-glucosyltransferase-gene-is-present-in-most-helicobacter-species-including-gastric-non-helicobacter-pylori-helicobacters-obtained-from-japanese-patients
#4
Masatomo Kawakubo, Kazuki Horiuchi, Takehisa Matsumoto, Jun Nakayama, Taiji Akamatsu, Tsutomu Katsuyama, Hiroyoshi Ota, Junji Sagara
BACKGROUND: Non-Helicobacter pylori helicobacters (NHPHs) besides H. pylori infect human stomachs and cause chronic gastritis and mucosa-associated lymphoid tissue lymphoma. Cholesteryl-α-glucosides have been identified as unique glycolipids present in H. pylori and some Helicobacter species. Cholesterol-α-glucosyltransferase (αCgT), a key enzyme for the biosynthesis of cholesteryl-α-glucosides, plays crucial roles in the pathogenicity of H. pylori. Therefore, it is important to examine αCgTs of NHPHs...
November 7, 2017: Helicobacter
https://www.readbyqxmd.com/read/29034040/infected-thoracic-aortic-aneurysm-caused-by-helicobacter-cinaedi
#5
Kazuo Kushimoto, Ryusuke Yonekura, Masayoshi Umesue, Yumi Oshiro, Hitoshi Yamasaki, Kenji Yoshida, Kensuke Oryoji, Eisuke Yokota
The causative organism is not identified in some cases of infected aneurysms, a life-threatening condition. A 68-year-old man presented with chest/back pain and a 1-year history of intermittent fever and fatigue. Computed tomography revealed a thoracic aortic aneurysm. After several negative blood cultures, he was eventually diagnosed with an infected aneurysm caused by Helicobacter cinaedi via gene analysis of an aortic tissue specimen. As H. cinaedi is a low-virulence bacterium, infection with this pathogen should be suspected in cases of aortic aneurysms with unidentified causative organism and a long history of subjective symptoms...
June 25, 2017: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/29028814/diversity-and-microevolution-of-crispr-loci-in-helicobacter-cinaedi
#6
Junko Tomida, Yuji Morita, Keigo Shibayama, Ken Kikuchi, Tomohiro Sawa, Takaaki Akaike, Yoshiaki Kawamura
Helicobacter cinaedi is associated with nosocomial infections. The CRISPR-Cas system provides adaptive immunity against foreign genetic elements. We investigated the CRISPR-Cas system in H. cinaedi to assess the potential of the CRISPR-based microevolution of H. cinaedi strains. A genotyping method based on CRISPR spacer organization was carried out using 42 H. cinaedi strains. The results of sequence analysis showed that the H. cinaedi strains used in this study had two CRISPR loci (CRISPR1 and CRISPR2). The lengths of the consensus direct repeat sequences in CRISPR1 and CRISPR2 were both 36 bp-long, and 224 spacers were found in the 42 H...
2017: PloS One
https://www.readbyqxmd.com/read/28891140/other-helicobacters-gastric-and-gut-microbiota
#7
REVIEW
Christelle Péré-Védrenne, Bram Flahou, Mun Fai Loke, Armelle Ménard, Jamuna Vadivelu
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...
September 2017: Helicobacter
https://www.readbyqxmd.com/read/28884138/chronic-helicobacter-cinaedi-cellulitis-diagnosed-by-microbial-polymerase-chain-reaction
#8
Andrew Matsumoto, Iwei Yeh, Brian Schwartz, Michael Rosenblum, Timothy H Schmidt
No abstract text is available yet for this article.
September 2017: JAAD Case Reports
https://www.readbyqxmd.com/read/28536343/-successful-prophylactic-minocycline-treatment-for-recurrent-helicobacter-cinaedi-sepsis-during-chemotherapy-in-a-patient-with-follicular-lymphoma
#9
Yasuo Aota, Akihiko Gotoh, Itaru Nakamura, Kazuki Motoya, Yuko Okuda, Naofumi Hanyu, Toshihiro Honma, Ryutaro Udou, Tomohisa Yokoyama, Naoyuki Kitagawa, Norio Komatsu
A 63-year-old man with follicular lymphoma was administered standard R-CHOP chemotherapy. Six days after the second course of chemotherapy, the patient developed fever and chills. Blood cultures yielded rod-shaped gram-negative bacteria, but no further identification was obtained. High fever and chills returned on the fifth and sixth days after the third and fourth courses of R-CHOP, respectively. These blood cultures were also positive. Since we detected spiral-shaped gram-negative rods, we performed a prolonged culture during the febrile period after the fourth course of R-CHOP...
May 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28508961/bacteremic-kidney-cyst-infection-caused-by-helicobacter-cinaedi
#10
Kenta Ito, Takumi Yamamoto, Haruomi Nishio, Asako Sawaya, Masaaki Murakami, Akiko Kitagawa, Yoko Matsuo, Ken Matsuo, Satoshi Tanaka, Noriko Mori
Cyst infection is one of the major complications in patients with autosomal dominant polycystic kidney disease (ADPKD). The causative pathogen in kidney cyst infection frequently goes undetected. Although only one case report of kidney cyst infection caused by Helicobacter cinaedi (H. cinaedi) is published in English literature, it may be an important pathogen in kidney cyst infection. Kidney cyst infection and H. cinaedi infection share the common characteristic of tendency to relapse and chronic kidney disease is a major risk factor for H...
November 2016: CEN Case Reports
https://www.readbyqxmd.com/read/28321078/helicobacter-cinaedi-bacteremia-mimicking-a-flare-of-systemic-lupus-erythematosus
#11
Ruriko Nishida, Nobuyuki Shimono, Noriko Miyake, Yong Chong, Shinji Shimoda, Hiroshi Tsukamoto, Koichi Akashi
A 40-year-old woman with systemic lupus erythematosus (SLE) presented with high-grade fever and severe thrombocytopenia. Acalculous cholecystitis and thrombocytopenia were initially suspected to be complicated with SLE and vasculitis. Contrary to our expectation, however, the patient was finally diagnosed with Helicobacter cinaedi bacteremia. SLE patients show various symptoms, especially when their condition is complicated with vasculitis, which mimics H. cinaedi bacteremia. It is therefore difficult to provide a definite diagnosis...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28247494/extraintestinal-infection-of-helicobacter-cinaedi-induced-by-oral-administration-to-balb-c-mice
#12
Takako Taniguchi, Yuji Saeki, Akihiko Okayama, Tetsuya Hayashi, Naoaki Misawa
Although Helicobacter cinaedi was initially considered an opportunistic pathogen in immunocompromised patients, it was later shown to also infect immunocompetent and healthy individuals. Sporadic bacteremia due to H. cinaedi has frequently been reported; however, whether the bacterium can be translocated after passage through the intestinal mucosa remains unclear. In the present study, a preclinical small animal model that faithfully reproduces H. cinaedi infection in humans was developed. Balb/c male mice were orally inoculated with a single dose of 6...
February 2017: Microbiology and Immunology
https://www.readbyqxmd.com/read/28173879/helicobacter-cinaedi-bacteremia-with-cellulitis-in-a-living-donor-kidney-transplant-recipient-identified-by-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-a-case-report
#13
Ai Katsuma, Izumi Yamamoto, Yukiko Tsuchiya, Mayuko Kawabe, Takafumi Yamakawa, Haruki Katsumata, Aki Mafune, Yasuyuki Nakada, Akimitsu Kobayashi, Kentaro Koike, Akihiro Shimizu, Yudo Tanno, Ichiro Ohkido, Nobuo Tsuboi, Seiji Hori, Hiroyasu Yamamoto, Takashi Yokoo
BACKGROUND: Helicobacter cinaedi causes bacteremia and cellulitis, mainly in immunocompromised patients. We report a rare case of H. cinaedi bacteremia with cellulitis in a living-donor kidney transplant recipient identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS). A 54-year-old Asian man with IgA nephropathy underwent living-donor kidney transplantation 14 years previously. He was admitted to our hospital for evaluation of fever and multifocal cellulitis...
February 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28061821/unusual-manifestation-of-helicobacter-cinaedi-infection-a-case-report-of-intracranial-subdural-empyema-and-bacteremia
#14
Toshimasa Hayashi, Junko Tomida, Yoshiaki Kawamura, Masakazu Yoshida, Ikuyo Yokozawa, Shingaku Kaneko
BACKGROUND: There have been various reports concerning Helicobacter cinaedi infections. However, few reports have examined central nervous system infections. CASE PRESENTATION: A 52-year-old man was transferred from the local hospital because of a persistent headache and suspected intracranial subdural empyema. Neurosurgical drainage was performed via burr holes. Gram staining and results from abscess cultures were negative. The blood culture yielded H. cinaedi...
January 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27613684/epithelial-coculture-and-l-lactate-promote-growth-of-helicobacter-cinaedi-under-h2-free-aerobic-conditions
#15
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 has been 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 coculture with human epithelial cells. When inoculated (in Ham's F12 medium) over Caco-2 monolayers, the type strain (ATCC BAA-847) gained the ability to proliferate under H2-free aerobic conditions...
November 15, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27531542/other-helicobacters-and-gastric-microbiota
#16
REVIEW
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
https://www.readbyqxmd.com/read/27407291/an-in-silico-approach-for-identification-of-the-pathogenic-species-helicobacter-pylori-and-its-relatives
#17
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
https://www.readbyqxmd.com/read/27381809/proposal-of-helicobacter-canicola-sp-nov-previously-identified-as-helicobacter-cinaedi-isolated-from-canines
#18
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
https://www.readbyqxmd.com/read/27357987/the-first-case-report-of-cerebral-cyst-infection-due-to-helicobacter-cinaedi
#19
Soichiro Abiko, Itaru Nakamura, Yoshiko Yamaguchi, Kiyofumi Ohkusu, Yoji Hirayama, Tetsuya Matsumoto
We report the first case of cerebral cyst infection by Helicobacter cinaedi, a fastidious spiral-shaped gram-negative rod bacterium. A 70-year-old man visited Tokyo Medical University Hospital with persisting fever since 2 weeks. He underwent surgery and radiotherapy for parapharyngeal space squamous cell carcinoma 10 years ago. The radiotherapy resulted in a cerebral cyst as a side effect, and an Ommaya reservoir was 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 H...
March 24, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27347485/refractory-to-treat-helicobacter-cinaedi-bacteremia-with-bilateral-lower-extremities-cellulitis-in-an-immunocompetent-patient
#20
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
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