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Fukushima A, Kobayashi T, Otsuka Y, Hosokawa N, Moody S, Takagi M, Yoshida A. A case of prosthetic valve endocarditis and aortic abscess due to Bacillus cereus. IDCases 2024; 36:e01940. [PMID: 38681080 PMCID: PMC11046206 DOI: 10.1016/j.idcr.2024.e01940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Accepted: 04/12/2024] [Indexed: 05/01/2024] Open
Abstract
Bacillus cereus (B. cereus) is commonly found in the environment and is often considered a blood culture contaminant. However, in patients with specific risk factors such as intravenous drug use, central venous access catheters, immunosuppression, or prosthetic valves, B. cereus can cause severe infections. Herein, we present a case of prosthetic valve endocarditis (PVE) caused by B. cereus in an 84-year-old woman with a history of aortic valve replacement for aortic stenosis five years earlier. She presented with anorexia, and her physical examination revealed tenderness in the left upper quadrant of the abdomen. Blood culture grew B. cereus, and a CT scan showed splenic infarction, raising suspicion of PVE. Transesophageal echocardiogram (TEE) revealed an abscess around the left coronary cusp of the aortic valve and a 15 mm vegetation. Due to the patient's high risk for post-operative complications and her unwillingness to undergo surgery, the surgery was deferred. Instead, she was successfully treated with six weeks of intravenous vancomycin and discharged home. Follow-up TEE demonstrated resolution of the vegetation and valvular abscess. At her six-month post-discharge evaluation, no signs of active infection were noted including fever or worsening heart failure. Although surgery is typically recommended for most cases of PVE, conservative treatment can be considered as an alternative option for selected patients.
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Affiliation(s)
- Akina Fukushima
- Department of General Internal Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
- Department of Infectious Diseases, Maebashi Red Cross Hospital, Maebashi, Gunma, Japan
| | - Takaaki Kobayashi
- Division of Infectious Diseases, University of Iowa, Iowa City, Iowa, USA
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Sandra Moody
- Department of Medicine, Divisions of Hospital Medicine & Geriatrics, University of California, San Francisco, USA
| | - Miyu Takagi
- Department of General Internal Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Akihito Yoshida
- Department of General Internal Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
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Watanabe N, Watari T, Otsuka Y, Hosokawa N, Yamagata K, Fujioka M. Clinical and microbiological characteristics of Ruminococcus gnavus bacteremia and intra-abdominal infection. Anaerobe 2024; 85:102818. [PMID: 38211774 DOI: 10.1016/j.anaerobe.2024.102818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/04/2024] [Accepted: 01/06/2024] [Indexed: 01/13/2024]
Abstract
OBJECTIVES Ruminococcus gnavus is a rare human pathogen, and clinical data on R. gnavus infection are insufficient. This retrospective study aimed to investigate the clinical characteristics of R. gnavus infections. METHODS This study included 13 cases of bacteremia and three cases of non-bacteremia infections caused by R. gnavus. We evaluated the patient data, infection source, clinical outcomes, and antimicrobial susceptibility of R. gnavus isolates for these cases. RESULTS The median age of patients was 75 years (range 47-95), and eight patients were female. Twelve cases were presumed to have an intra-abdominal infection source, and the remaining four cases had an unknown infection source. The most common underlying conditions were immunosuppression (seven cases), solid tumors (seven cases), and history of gastrointestinal surgery (five cases). Thirteen patients exhibited gastrointestinal problems (dysfunction, bleeding, intra-abdominal infection, or inflammation). Multiple pathogens were observed in six cases, and fatal outcomes were recorded in three cases. Antimicrobial susceptibility data were available for eight isolates, all of which exhibited low minimum inhibitory concentrations to penicillin (≤0.03 μg/mL), ampicillin-sulbactam (≤0.5 μg/mL), piperacillin-tazobactam (≤4 μg/mL), and metronidazole (≤0.5-1 μg/mL). CONCLUSION Ruminococcus gnavus is frequently associated with an intra-abdominal infection source, and treatment strategies should consider the possibility of multiple pathogens.
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Affiliation(s)
- Naoki Watanabe
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan; Graduate School of Health Sciences, Hirosaki University, Hon-cho 66-1, Hirosaki, Aomori, Japan.
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan.
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan.
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, Higashi-cho 929, Kamogawa, Chiba, Japan.
| | - Kazufumi Yamagata
- Graduate School of Health Sciences, Hirosaki University, Hon-cho 66-1, Hirosaki, Aomori, Japan.
| | - Miyuki Fujioka
- Graduate School of Health Sciences, Hirosaki University, Hon-cho 66-1, Hirosaki, Aomori, Japan.
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Nagai T, Matsui H, Fujioka H, Homma Y, Otsuki A, Ito H, Ohmura S, Miyamoto T, Shichi D, Tomohisa W, Otsuka Y, Nakashima K. Low-Dose vs Conventional-Dose Trimethoprim-Sulfamethoxazole Treatment for Pneumocystis Pneumonia in Patients Not Infected With HIV: A Multicenter, Retrospective Observational Cohort Study. Chest 2024; 165:58-67. [PMID: 37574166 DOI: 10.1016/j.chest.2023.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/19/2023] [Accepted: 08/06/2023] [Indexed: 08/15/2023] Open
Abstract
BACKGROUND Trimethoprim-sulfamethoxazole (TMP-SMX) is an effective treatment for Pneumocystis jirovecii pneumonia (PCP) in immunocompromised patients with and without HIV infection; however, a high incidence of adverse events has been observed. Low-dose TMP-SMX is a potentially effective treatment with fewer adverse events; however, evidence is limited. RESEARCH QUESTION What is the efficacy and safety of low-dose TMP-SMX for non-HIV PCP compared with conventional-dose TMP-SMX after adjusting for patient background characteristics? STUDY DESIGN AND METHODS In this multicenter retrospective cohort study, we included patients diagnosed with non-HIV PCP and treated with TMP-SMX between June 2006 and March 2021 at three institutions. The patients were classified into low-dose (TMP < 12.5 mg/kg/d) and conventional-dose (TMP 12.5-20 mg/kg/d) groups. The primary end point was 30-day mortality, and the secondary end points were 180-day mortality, adverse events grade 3 or higher per the Common Terminology Criteria for Adverse Events v5.0, and initial treatment completion rates. Background characteristics were adjusted using the overlap weighting method with propensity scores. RESULTS Fifty-five patients in the low-dose group and 81 in the conventional-dose group were evaluated. In the overall cohort, the average age was 70.7 years, and the proportion of women was 55.1%. The average dose of TMP-SMX was 8.71 mg/kg/d in the low-dose group and 17.78 mg/kg/d in the conventional-dose group. There was no significant difference in 30-day mortality (6.7% vs 18.4%, respectively; P = .080) or 180-day mortality (14.6% vs 26.1%, respectively; P = .141) after adjusting for patient background characteristics. The incidence of adverse events, especially nausea and hyponatremia, was significantly lower in the low-dose group (29.8% vs 59.0%, respectively; P = .005). The initial treatment completion rates were 43.3% and 29.6% in the low-dose and conventional-dose groups (P = .158), respectively. INTERPRETATION Survival was similar between the low-dose and conventional-dose TMP-SMX groups, and low-dose TMP-SMX was associated with reduced adverse events in patients with non-HIV PCP.
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Affiliation(s)
- Tatsuya Nagai
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, University of Tokyo, Tokyo, Japan; Clinical Research Support Office, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Haruka Fujioka
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Yuya Homma
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Ayumu Otsuki
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Hiroyuki Ito
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Shinichiro Ohmura
- Department of Rheumatology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
| | - Toshiaki Miyamoto
- Department of Rheumatology, Seirei Hamamatsu General Hospital, Hamamatsu, Shizuoka, Japan
| | - Daisuke Shichi
- Department of Infectious Diseases and Rheumatology, Seirei Mikatahara General Hospital, Hamamatsu, Shizuoka, Japan
| | - Watari Tomohisa
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Kei Nakashima
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan.
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Nakayama M, Ueta E, Yoshida M, Shimizu Y, Tokuda A, Sone Y, Nomi Y, Otsuka Y. Analysis of an antioxidative defence system of hydrogen peroxide-treated pancreatic islet-derived 1.1B4 cells and siRNA targeting NR4A3-treated cells by microarray. Redox Rep 2023; 28:2247150. [PMID: 37581334 PMCID: PMC10435006 DOI: 10.1080/13510002.2023.2247150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023] Open
Abstract
Pancreatic islet β-cells weaken under oxidative stress. In this study, human pancreatic islet-derived 1.1B4 cells were exposed to H2O2 and analysed using a human microarray, which revealed that heme oxygenase 1 (HMOX1), glutamate-cysteine ligase, early growth response 1, nuclear receptor subfamily 4 group A member 3 (NR4A3) and jun B proto-oncogene were upregulated, whereas superoxide dismutase 1 and catalase were not. Expression of NR4A3 rapidly increased after H2O2 addition, and the 1.1B4 cells treated with siRNA targeting NR4A3 became sensitive to H2O2; further, HMOX1 expression was strongly inhibited, suggesting that NR4A3 is an oxidative stress-responsive transcription factor that functions through HMOX1 expression in pancreatic islet β-cells. Expression of cyclin E1 and cyclin-dependent kinase 1 was also inhibited by siRNAs targeting NR4A3.
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Affiliation(s)
- Motoko Nakayama
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
| | - Etsuko Ueta
- School of Health Science, Faculty of Medicine, Tottori University, Tottori, Japan
| | - Mitsuru Yoshida
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
| | - Yuri Shimizu
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
- Department of Food Business, Nihon University, Kanagawa, Japan
| | - Atsuko Tokuda
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
| | - Yasuko Sone
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
- Department of Health and Nutrition, Takasaki University of Health and Welfare, Gunma, Japan
| | - Yuri Nomi
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
- Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
| | - Y. Otsuka
- Department of Life Science, Graduate School, Ochanomizu University, Tokyo, Japan
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Nakashima K, Homma Y, Taniguchi J, Kubota N, Otsuki A, Ito H, Otsuka Y, Kondo K, Ohfuji S, Fukushima W, Hirota Y. Immunogenicity and safety of influenza vaccine in patients with lung cancer receiving immune checkpoint inhibitors: A single-center prospective cohort study. J Infect Chemother 2023; 29:1038-1045. [PMID: 37481070 DOI: 10.1016/j.jiac.2023.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/27/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023]
Abstract
INTRODUCTION Patients with lung cancer have a high risk of influenza complications. International guidelines recommend annual influenza vaccination for patients with cancer. Immune checkpoint inhibitors (ICIs) are progressively used to treat lung cancer. Data regarding immunogenicity and safety of influenza vaccine are limited in patients with lung cancer receiving ICIs; therefore, we conducted this single-center, prospective observational study in the Japanese population. METHODS Patients with lung cancer receiving ICIs and influenza immunization were enrolled. Blood samples were collected from patients for serum antibody titer measurement pre- and 4 ± 1 weeks post-vaccination. The primary endpoint was seroprotection rate (sP) at 4 ± 1 weeks post-vaccination. The secondary endpoints were geometric mean titer (GMT), mean fold rise, seroresponse rate (sR), seroconversion rate (sC), and immune-related adverse events (irAEs), defined as adverse effects caused by ICI administration, 6 months post-vaccination. RESULTS Influenza vaccination in the 23 patients included in the immunogenicity analyses significantly increased GMT for all strains, and sP, sR, and sC were 52%-91%, 26%-39%, and 26%-35%, respectively. In the 24 patients included in the safety analyses, 7 (29%) and 5 (21%) patients exhibited systemic and local reactions, respectively. Only one patient (4%) (hypothyroidism, grade 2) showed post-vaccination irAEs. CONCLUSIONS Overall, influenza vaccination in patients with lung cancer receiving ICIs showed acceptable immunogenicity and safety, thus supporting annual influenza vaccination in this population.
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Affiliation(s)
- Kei Nakashima
- Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan; Kameda Institute for Health sciences, 462 Yokosuka, Kamogawa, Chiba, 296-0001, Japan; Department of Public Health, Graduate School of Medicine, Osaka Metropolitan University, 1 Chome-4-3 Asahimachi, Osaka, 545-8585, Japan.
| | - Yuya Homma
- Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Jumpei Taniguchi
- Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Norihiko Kubota
- Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Ayumu Otsuki
- Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Hiroyuki Ito
- Department of Pulmonology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-0041, Japan
| | - Kyoko Kondo
- Management Bureau, Osaka Metropolitan University Hospital, 1 Chome-5-7 Asahimachi, Osaka, 545-0051, Japan
| | - Satoko Ohfuji
- Department of Public Health, Graduate School of Medicine, Osaka Metropolitan University, 1 Chome-4-3 Asahimachi, Osaka, 545-8585, Japan; Research Center for Infectious Disease Sciences, Graduate School of Medicine, Osaka Metropolitan University, 1 Chome-4-3 Asahimachi, Osaka, 545-8585, Japan
| | - Wakaba Fukushima
- Department of Public Health, Graduate School of Medicine, Osaka Metropolitan University, 1 Chome-4-3 Asahimachi, Osaka, 545-8585, Japan; Research Center for Infectious Disease Sciences, Graduate School of Medicine, Osaka Metropolitan University, 1 Chome-4-3 Asahimachi, Osaka, 545-8585, Japan
| | - Yoshio Hirota
- Clinical Epidemiology Research Center, SOUSEIKAI Medical Group (Medical Co. LTA), 3-5-1 Kashiiteriha, Higashi-ku, Fukuoka, 813-0017, Japan
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Ikeda D, Fukumoto A, Uesugi Y, Tabata R, Miura D, Narita K, Takeuchi M, Watari T, Otsuka Y, Matsue K. Clinical and immunological characteristics of prolonged SARS-CoV-2 Omicron infection in hematologic disease. Blood Cancer J 2023; 13:133. [PMID: 37666820 PMCID: PMC10477167 DOI: 10.1038/s41408-023-00897-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/22/2023] [Accepted: 08/01/2023] [Indexed: 09/06/2023] Open
Affiliation(s)
- Daisuke Ikeda
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Ami Fukumoto
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Yuka Uesugi
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Rikako Tabata
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Daisuke Miura
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Kentaro Narita
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Masami Takeuchi
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Tomohisa Watari
- Central laboratory, Kameda Medical Center, Kamogawa-shi, Japan
| | | | - Kosei Matsue
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan.
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Narita K, Ikeda D, Seki M, Fukumoto A, Tabata R, Uesugi Y, Miura D, Takeuchi M, Doi M, Umezawa Y, Otsuka Y, Matsue K. Prevalence and Clinical Outcome of Omicron Breakthrough Infection in Patients With Hematologic Disease: A Prospective Observational Cohort Study. Hemasphere 2023; 7:e905. [PMID: 37292116 PMCID: PMC10247214 DOI: 10.1097/hs9.0000000000000905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/03/2023] [Indexed: 06/10/2023] Open
Affiliation(s)
- Kentaro Narita
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Daisuke Ikeda
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Mizuki Seki
- Postgraduate Education Center, Kameda Medical Center, Kamogawa-shi, Japan
| | - Ami Fukumoto
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Rikako Tabata
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Yuka Uesugi
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Daisuke Miura
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Masami Takeuchi
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
| | - Masahiro Doi
- Central laboratory, Kameda Medical Center, Kamogawa-shi, Japan
| | - Yuka Umezawa
- Central laboratory, Kameda Medical Center, Kamogawa-shi, Japan
| | | | - Kosei Matsue
- Division of Hematology/Oncology, Department of Medicine, Kameda Medical Center, Kamogawa-shi, Japan
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Takaoka H, Otsuka Y, Fukuda M, Low VL, Ya'cob Z. Morphological redescription of Simulium takahasii (Rubtsov), the first species of the subgenus Wilhelmia Enderlein (Diptera: Simuliidae) recognized in East Asia. Trop Biomed 2023; 40:266-272. [PMID: 37650416 DOI: 10.47665/tb.40.2.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Simulium takahasii (Rubtsov), which was originally described from Japan, and recorded from Korea and China, is the first among the 19 species of the subgenus Wilhelmia Enderlein recorded from East Asia. It is striking in mating, blood-feeding and ovipositing in captivity and in experimentally transmitting Dirofilaria immitis (Leidy) and Brugia pahangi (Buckley & Edeson), and it is a severe biter of cattle and horses, rarely of humans. Nevertheless, updated information about its morphological characteristics was lacking, making comparisons with related species described from China difficult, since species of the subgenus Wilhelmia are almost indistinguishable from one another, in particular, in their female terminalia, male genitalia and most of larval features. In this study, as many morphological characteristics as possible of S. takahasii based on specimens from Japan are redescribed. New information about many features of this species including the length of the female sensory vesicle against the third palpal segment, number of male upper-eye (large) facets, arrangement of the eight pupal gill filaments, presence or absence of tiny dark setae on the dorsum of the larval abdomen and the number of rows and hooklets of the larval posterior circlet will be useful in evaluating the species status of several Wilhelmia species in China including the species regarded as S. takahasii.
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Affiliation(s)
- H Takaoka
- Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Y Otsuka
- International Center for Island Studies, Kagoshima University, Korimoto 1-21-24, Kagoshima, 890-8580 Japan
| | - M Fukuda
- Institute for Research Management, Oita University, Idaigaoka 1-1, Hasama, Yufu City, Oita, 879-5593, Japan
| | - V L Low
- Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Z Ya'cob
- Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
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Takaoka H, Otsuka Y, Fukuda M, Low VL, Ya'cob Z. Morphological and genetic analyses of Simulium (Gomphostilbia) okinawense Takaoka and S. (G.) tokarense Takaoka (Diptera: Simuliidae) from the Nansei Islands, Japan: redescription and transfer from the S. ceylonicum species-group to the S. asakoae species-group. Trop Biomed 2023; 40:88-100. [PMID: 37356008 DOI: 10.47665/tb.40.1.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Simulium (Gomphostilbia) okinawense Takaoka and S. (G.) tokarense Takaoka, both from the Nansei Islands, Japan, were morphologically reexamined and genetically analysed by using the COI gene sequences. The female, male, pupa and mature larva of the two species are redescribed. Morphological reexamination shows that both species are more similar to species in the S. asakoae species-group than to those in the S. ceylonicum species-group, by having a medium-long female sensory vesicle, yellow tuft hairs (S. (G.) okinawense) or yellow tuft hairs mixed with a few to several dark hairs (S. (G.) tokarense) at the base of the radial vein in the female and male, and medium-long larval postgenal cleft. However, the body of the male ventral plate (viewed ventrally) is parallel-sided (S. (G.) okinawense) or parallelsided or slightly narrowed (S. (G.) tokarense) and not emarginated basally, differing from those of most species in the S. asakoae species-group. Our genetic analysis shows that S. (G.) tokarense is in the S. asakoae species-group, and S. (G.) okinawense formed a separate sister clade with other members of the S. asakoae species-group with high bootstrap support. From the results of morphological and genetic analysis combined, S. (G.) okinawense and S. (G.) tokarense are transferred from the S. ceylonicum species-group to the S. asakoae species-group.
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Affiliation(s)
- H Takaoka
- Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Y Otsuka
- International Center for Island Studies, Kagoshima University, Korimoto 1-21-24, Kagoshima, 890-8580 Japan
| | - M Fukuda
- Institute for Research Management, Oita University, Idaigaoka 1-1, Hasama, Yufu City, Oita, 879-5593, Japan
| | - V L Low
- Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Z Ya'cob
- Higher Institution of Centre of Excellence (HICoE), Tropical Infectious Diseases Research and Education Centre (TIDREC), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
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Nakashima K, Ishida M, Matsui H, Yoshida C, Nagai T, Shiraga M, Nakaoka H, Otsuka Y, Nakagama Y, Kaku N, Nitahara Y, Kido Y, Hirota Y. Immunogenicity and safety of COVID-19 vaccine in lung cancer patients receiving anticancer treatment: A prospective multicenter cohort study. Hum Vaccin Immunother 2022; 18:2140549. [PMID: 36369871 DOI: 10.1080/21645515.2022.2140549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This study assessed the immunogenicity and safety of the BNT162b2 mRNA vaccine in lung cancer patients receiving anticancer treatment. We enrolled lung cancer patients receiving anticancer treatment and non-cancer patients; all participants were fully vaccinated with the BNT162b2 vaccine. Blood samples were collected before the first and second vaccinations and 4 ± 1 weeks after the second vaccination. Anti-severe respiratory syndrome coronavirus-2 (SARS-CoV-2) spike protein S1 subunit receptor-binding domain antibody titers were measured using the Architect SARS-CoV-2 IgG II Quant and Elecsys Anti-SARS-CoV-2 S assays. Fifty-five lung cancer patients and 38 non-cancer patients were included in the immunogenicity analysis. Lung cancer patients showed significant increase in the geometric mean antibody concentration, which was significantly lower than that in the non-cancer patients after the first (30 vs. 121 AU/mL, p < .001 on Architect; 4.0 vs 1.2 U/mL, p < .001 on Elecsys) and second vaccinations (1632 vs. 3472 AU/mL, p = .005 on Architect; 213 vs 573 A/mL, p = .002 on Elecsys). The adjusted odds ratio (aOR) for seroprotection was significantly lower (p < .05) in lung cancer patients than that in non-cancer patients. Analysis of the anticancer treatment types showed that the aOR for seroprotection was significantly lower (p < .05) in lung cancer patients receiving cytotoxic agents. They showed no increase in adverse reactions. BNT162b2 vaccination in lung cancer patients undergoing anticancer treatment significantly increased (p < .05) antibody titers and showed acceptable safety. Immunogenicity in these patients could be inadequate compared with that in non-cancer patients.
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Affiliation(s)
- Kei Nakashima
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | | | - Hiroki Matsui
- Clinical Research Support Office, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Chihiro Yoshida
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Tatsuya Nagai
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Minoru Shiraga
- Department of Pulmonology, Chikamori Hospital, Kochi, Japan
| | | | - Yoshihito Otsuka
- Department of Laboratory medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Yu Nakagama
- Department of Virology & Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Natsuko Kaku
- Department of Virology & Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Yuko Nitahara
- Department of Virology & Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Yasutoshi Kido
- Department of Virology & Parasitology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Yoshio Hirota
- Clinical Epidemiology Research Center, SOUSEIKAI Medical Group (Medical Co. LTA), Fukuoka, Japan
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11
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Otsuka Y, Ishii M, Nakamura T, Tsujita K, Fujita H, Matoba T, Kohro T, Kabutoya T, Kario K, Kiyosue A, Mizuno Y, Nakayama M, Miyamoto Y, Sato H, Nagai R. Impact of BNP level in patients with heart failure on major bleeding events after percutaneous coronary intervention. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Aims
The Academic Research Consortium for High Bleeding Risk (ARC-HBR) presents a bleeding risk assessment in antithrombotic therapy for patients post percutaneous coronary intervention (PCI). In Japanese patients, heart failure (HF), peripheral vascular disease, and frailty are established as bleeding risk factors in addition to ARC-HBR. However, it is unknown whether left ventricular function or severity of HF is associated with HBR. The aim of this study was to investigate the association between the severity of HF measured by BNP and future bleeding events after PCI.
Methods
Clinical Deep Data Accumulation System (CLIDAS), a multicenter database with 7 tertiary medical hospitals in JAPAN, was developed to collect data directly for patient characteristics, medications, laboratory test, physiological test, cardiac catheterization and PCI treatment in electronic medical records using Standardized Structured Medical Information eXchange Extended Storage (SS-MIX). This retrospective analysis using CLIDAS database included 7160 patients who underwent PCI during April 2014 and March 2020 in the participating hospitals and also who have completed 3-year follow-up were divided into two groups: No HF (n=6645) and HF (n=515). HF patients were furthermore divided based on high BNP (≥100 pg/ml) group (n=384) and low BNP (<100 pg/ml) group (n=131). Primary outcome was defined as bleeding events according to the moderate and severe bleeding in the GUSTO classification. In addition, secondary endpoint was major adverse cardiovascular events (MACE) defined as a composite of cardiac death, myocardial infraction and stroke.
Results
Multivariable Cox regression adjusted for age, sex, BMI, acute coronary syndrome, hypertension, diabetes, dyslipidemia, chronic kidney disease, hemodialysis, previous PCI, previous coronary artery bypass grafting, prior myocardial infraction, prior stroke, prior atrial fibrillation, prior PVD, left main trunk disease, multivessel disease, and anticoagulants use showed that HF with high BNP was significantly associated with bleeding events (hazard ratio [HR], 1.66; 95% confidence interval [CI], 1.10–2.50), MACE (HR, 2.16; 95% CI, 1.60–2.90), and all-cause death (HR, 1.74; 95% CI, 1.30–2.33), but not HF with low BNP.
Conclusions
The CLIDAS real-world database revealed that HF with high BNP was associated with future bleeding events, suggesting that bleeding risk might be altered depending on severity of HF.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Otsuka
- Kumamoto University Hospital , Kumamoto , Japan
| | - M Ishii
- Kumamoto University Hospital , Kumamoto , Japan
| | - T Nakamura
- Kumamoto University Hospital , Kumamoto , Japan
| | - K Tsujita
- Kumamoto University Hospital , Kumamoto , Japan
| | - H Fujita
- Jichi Medical University , Tochigi , Japan
| | - T Matoba
- Kyushu University , Fukuoka , Japan
| | - T Kohro
- Jichi Medical University , Tochigi , Japan
| | - T Kabutoya
- Jichi Medical University , Tochigi , Japan
| | - K Kario
- Jichi Medical University , Tochigi , Japan
| | | | - Y Mizuno
- University of Tokyo , Tokyo , Japan
| | | | - Y Miyamoto
- National Cerebral and Cardiovascular Center Hospital , Osaka , Japan
| | - H Sato
- Precision K.K. , Tokyo , Japan
| | - R Nagai
- Jichi Medical University , Tochigi , Japan
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Maeda H, Gopal Dhoubhadel B, Sando E, Suzuki M, Furumoto A, Asoh N, Yaegashi M, Aoshima M, Ishida M, Hamaguchi S, Otsuka Y, Morimoto K. Long-term impact of pneumococcal conjugate vaccines for children on adult pneumococcal pneumonia in Japan: Two multicenter observational studies from 2011 to 2020. Vaccine 2022; 40:5504-5512. [PMID: 35963821 DOI: 10.1016/j.vaccine.2022.07.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND Pediatric pneumococcal conjugate vaccines (PCVs) introduction has directly and indirectly reduced pneumococcal pneumonia and invasive disease caused by PCV-covered serotypes among children and adults globally. In Japan, both PCV7 and PCV13 were introduced into the national immunization program (NIP) for children in 2013. However, the long-term impact of PCV use in children on adult pneumococcal pneumonia in Japan remains unclear. METHODS We assessed serotypes isolated from adult pneumococcal pneumonia patients (in- and outpatients) in two multicenter observational studies in Japan: 2011-2014 and 2016-2020. The latter study period was divided into two periods to evaluate changes after PCV introduction in children. The Quellung reaction was used to determine serotypes. We evaluated trends of individual and vaccine-covered serotypes over three periods and assessed the difference in changes by patient group before and after the introduction of pediatric PCVs. RESULTS A total of 650 patients were enrolled: 224, 322, and 104 in 2011-2014, 2016-2017, and 2018-2020, respectively. The median age was 73 years; 59.7% (388/650) were male; 86.9% (565/650) had comorbidities; and 10.2% (66/650) were nursing-home residents. The proportion of PCV13 serotypes decreased from 52.7% in 2011-2014 to 30.4% in 2016-2017 (p <0.001) after PCV13 introduction for children. However, PCV13, PCV15, and PCV20 serotypes still accounted for 38.5, 43.3, and 59.6% of total pneumococcal pneumonia in 2018-2020, respectively. Decline of PCV13 serotypes was more marked in patients aged ≥65 (-23.5%; p <0.001) than those aged <65 (-12.3%; p = 0.104) from 2011-2014 to 2016-2020. The proportion of PPSV23 non-PCV13 serotypes didn't change over time. CONCLUSIONS The proportion of adult pneumococcal pneumonia caused by PCV13 serotypes in Japan declined after pediatric PCVs introduction into NIP, possibly due to indirect effects of pediatric PCVs. However, use of new PCVs in Japanese adults may potentially prevent additional pneumococcal pneumonia cases. Now, pneumococcal vaccination strategy for older adults requires discussion.
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Affiliation(s)
- Haruka Maeda
- Department of Respiratory Infections, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
| | - Bhim Gopal Dhoubhadel
- Department of Respiratory Infections, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
| | - Eiichiro Sando
- Department of Respiratory Infections, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of General Internal Medicine and Clinical Infectious Diseases, Fukushima Medical University, Fukushima, Japan
| | - Motoi Suzuki
- Department of Respiratory Infections, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Akitsugu Furumoto
- Department of Infectious Diseases, Nagasaki Rosai Hospital, Nagasaki, Japan
| | - Norichika Asoh
- Department of Internal Medicine, Juzenkai Hospital, Nagasaki, Japan
| | - Makito Yaegashi
- Department of General Internal Medicine, Kameda Medical Center, Chiba, Japan
| | | | - Masayuki Ishida
- Department of Respiratory Medicine, Chikamori Hospital, Kochi, Japan
| | - Sugihiro Hamaguchi
- Department of General Internal Medicine, Fukushima Medical University, Fukushima, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Chiba, Japan
| | - Konosuke Morimoto
- Department of Respiratory Infections, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan.
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Muranaka E, Hase R, Utsu Y, Watari T, Otsuka Y, Hosokawa N. Catheter-related bloodstream Mycobacterium wolinskyi infection in an umbilical cord blood transplant recipient: a case report. BMC Infect Dis 2022; 22:520. [PMID: 35659262 PMCID: PMC9167550 DOI: 10.1186/s12879-022-07495-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 05/26/2022] [Indexed: 11/16/2022] Open
Abstract
Background Catheter-related bloodstream infection (CRBSI), caused by rapidly growing mycobacteria (RGM), is a rare infectious complication in hematopoietic stem cell transplant (HSCT) recipients and can often be misdiagnosed as Gram-positive rod (GPR) bacteremia. Case presentation We present a case of CRBSI caused by Mycobacterium wolinskyi, a rare RGM, in a 44-year-old female patient who received an umbilical cord blood transplant. Conclusions Rapidly growing mycobacteria can stain as GPRs and may grow in routine blood culture media after 3–4 days of incubation. These features are not widely known to clinicians, and acid-fast staining is therefore recommended when unidentifiable GPRs are detected in blood cultures, especially in immunocompromised patients, such as those with hematologic malignancies or intravascular devices.
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14
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Watanabe N, Watari T, Otsuka Y, Yamagata K, Fujioka M. Clinical characteristics and antimicrobial susceptibility of Klebsiella pneumoniae, Klebsiella variicola and Klebsiella quasipneumoniae isolated from human urine in Japan. J Med Microbiol 2022; 71. [PMID: 35699119 DOI: 10.1099/jmm.0.001546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction. The three Klebsiella species K. pneumoniae, K. variicola and K. quasipneumoniae are difficult to distinguish, owing to their similar biochemical properties, and are often confused in medical practice.Gap statement. There is a scarcity of data comparing the clinical characteristics and antimicrobial susceptibility of K. pneumoniae, K. variicola and K. quasipneumoniae. We believe that knowledge of the characteristics of each species will help in their better identification. Further, knowing the antimicrobial susceptibility of the species will help physicians in prescribing an effective treatment course for Klebsiella infections.Aim. This study aimed to determine the clinical characteristics and antimicrobial resistance of K. pneumoniae, K. variicola and K. quasipneumoniae isolated from human urine samples.Methodology. This study included 125 K. pneumoniae strains isolated from human urine samples. Multiplex polymerase chain reaction was performed to identify K. pneumoniae, K. variicola and K. quasipneumoniae. We retrospectively investigated the patient background, complications of bacteraemia, antimicrobial susceptibility and extended-spectrum β-lactamase (ESBL).Results. We identified 84 (67.2 %), 31 (24.8 %) and 10 strains (8 .0%) of K. pneumoniae, K. variicola and K. quasipneumoniae, respectively. There was no difference in patient background and frequency of bacteraemia complications among these species. K. pneumoniae was significantly less susceptible than K. variicola to ampicillin/sulbactam (P=0.03) and piperacillin (P<0.01). Furthermore, K. pneumoniae (79.8 %) was less susceptible to trimethoprim/sulfamethoxazole than K. variicola (96.8 %) and K. quasipneumoniae (100 %). There were nine ESBL-producing strains (7.2 %), all of which were K. pneumoniae.Conclusion. There was no difference in patient background and frequency of bacteraemia complications between K. pneumoniae, K. variicola and K. quasipneumoniae isolated from urine. The three Klebsiella species showed a varying extent of antimicrobial susceptibility and ESBL production, and accurate identification is needed to understand the epidemiology of these species.
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Affiliation(s)
- Naoki Watanabe
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa-shi, Chiba, 296-8602, Japan.,Hirosaki University, Graduate School of Health Sciences, Hon-cho 66-1, Hirosaki-shi, Aomori, 036-8564, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa-shi, Chiba, 296-8602, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Higashi-cho 929, Kamogawa-shi, Chiba, 296-8602, Japan
| | - Kazufumi Yamagata
- Hirosaki University, Graduate School of Health Sciences, Hon-cho 66-1, Hirosaki-shi, Aomori, 036-8564, Japan
| | - Miyuki Fujioka
- Hirosaki University, Graduate School of Health Sciences, Hon-cho 66-1, Hirosaki-shi, Aomori, 036-8564, Japan
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15
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Affiliation(s)
- Y Saishoji
- Address correspondence to Dr Y. Saishoji, Department of General Internal Medicine, National Hospital Organization Nagasaki Medical Center, Kubara 1001-1, Nagasaki, Omura 856-8562, Japan.
| | - Y Izumi
- From the Department of General Internal Medicine, National Hospital Organization Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki 856-8562, Japan
| | - Y Otsuka
- From the Department of General Internal Medicine, National Hospital Organization Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki 856-8562, Japan
| | - H Yura
- Department of Respiratory disease, National Hospital Organization Nagasaki Medical Center, Kubara 2-1001-1, Omura, Nagasaki 856-8562, Japan
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16
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Terao T, Yamashita T, Fukumoto A, Kamura Y, Ikeda D, Kuzume A, Tabata R, Tsushima T, Miura D, Narita K, Takeuchi M, Doi M, Umezawa Y, Otsuka Y, Takamatsu H, Matsue K. Low clinical protective response to SARS-CoV-2 mRNA COVID-19 vaccine in patients with multiple myeloma. Int J Hematol 2022; 115:737-747. [PMID: 35190963 PMCID: PMC8860256 DOI: 10.1007/s12185-022-03300-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/25/2022] [Accepted: 01/25/2022] [Indexed: 12/27/2022]
Abstract
We conducted a prospective, three-center, observational study in Japan to evaluate the prevalence of seropositivity and clinically protective titer after coronavirus disease 2019 vaccination in patients with plasma cell dyscrasia(PCD). Two-hundred sixty-nine patients with PCD [206 symptomatic multiple myeloma (MM)] were evaluated. Seropositivity was observed in 88.7% and a clinically protective titer in 38.3% of MM patients, both of which were significantly lower than those of healthy controls. Patients receiving anti-CD38 antibodies had much lower antibody titers, but antibody titers recovered in those who underwent a wash-out period before vaccine administration. Older age (≥65), anti-CD38 antibody administration, immunomodulatory drugs use, lymphopenia (<1000/μL), and lower polyclonal IgG (<550 mg/dL) had a negative impact for the sufficient antibody production according to multivariate analysis. Patients with clinically protective titer had a significantly higher number of CD19+ lymphocytes than those with lower antibody responses (114 vs. 35/μL, p = 0.016). Our results suggested that patients with PCD should be vaccinated, and that the ideal protocol is to temporarily interrupt anti-CD38 antibody therapy for a “wash-out” period of a few months, followed by a (booster) vaccine after the B-cells have recovery.
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Affiliation(s)
- Toshiki Terao
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Takeshi Yamashita
- Department of Hematology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan.,Division of Internal Medicine, Keiju Kanazawa Hospital, Ishikawa, Japan
| | - Ami Fukumoto
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Yuya Kamura
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Daisuke Ikeda
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Ayumi Kuzume
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Rikako Tabata
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Takafumi Tsushima
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Daisuke Miura
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Kentaro Narita
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Masami Takeuchi
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Masahiro Doi
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Japan
| | - Yuka Umezawa
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Japan
| | - Hiroyuki Takamatsu
- Department of Hematology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan.
| | - Kosei Matsue
- Division of Hematology/Oncology, Department of Internal Medicine, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
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17
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Nakashima K, Misawa M, Otsuki A, Narita K, Otsuka Y, Matsue K, Aoshima M. Efficacy and Safety of Endobronchial Ultrasonography with a Guide-sheath for Acute Pulmonary Lesions in Patients with Haematological Diseases. Intern Med 2022; 61:623-632. [PMID: 35228474 PMCID: PMC8943388 DOI: 10.2169/internalmedicine.6364-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Objective Acute pulmonary lesions (APLs), defined as an acute infiltrate or nodular lung field, are a major complication in patients with haematological diseases. Recently, endobronchial ultrasonography with a guide-sheath (EBUS-GS) was established as a useful technique for diagnosing pulmonary lesions. This study aimed to evaluate the efficacy and safety of EBUS-GS for managing APLs in patients with haematological diseases. Methods Our single-centre, retrospective, observational, single-arm, descriptive study enrolled 22 consecutive adult (>20-year-old) patients with haematological diseases and concomitant APL who underwent EBUS-GS between January 2011 and June 2016 at Kameda Medical Center, Chiba, Japan. The primary endpoint was the contribution of EBUS-GS to clinical decision-making. Secondary endpoints were an adequate tissue collection rate, diagnostic yield, complication rate, and 30-day mortality. Results The median patient age was 70 years old, and 63.6% were men. Acute myeloid leukaemia was the most frequent underlying disease, accounting for 54.5% of patients. The contribution of EBUS-GS to clinical decision-making was recognised in 11 (50.0%) patients. Adequate tissue collection was achieved in 21 (95.5%) patients. The aetiology of the APL was identified in 9 (40.9%) patients. No complications, including severe haemorrhaging and pneumothorax, were observed in any patients, and the 30-day mortality rate was 0%. Conclusion EBUS-GS may be a suitable diagnostic option for APL in patients with haematological diseases. Further larger-scale and randomised controlled trials are needed to confirm our results.
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Affiliation(s)
- Kei Nakashima
- Department of Pulmonology, Kameda Medical Center, Japan
| | | | - Ayumu Otsuki
- Department of Pulmonology, Kameda Medical Center, Japan
| | | | | | - Kosei Matsue
- Department of Haematology, Kameda Medical Center, Japan
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Watanabe N, Otsuka Y, Watari T, Hosokawa N, Yamagata K, Fujioka M. Time to positivity of Corynebacterium in blood culture: Characteristics and diagnostic performance. PLoS One 2022; 17:e0278595. [PMID: 36512568 PMCID: PMC9747040 DOI: 10.1371/journal.pone.0278595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022] Open
Abstract
The presence of Corynebacterium in blood samples can indicate true bacteremia or contamination, thus complicating the diagnosis of true bacteremia. We aimed to evaluate the usefulness of time to positivity (TTP) in diagnosing true bacteremia and contamination in cases where Corynebacterium was isolated from blood samples. We compared the TTP of the true-bacteremia group (n = 77) with that of the contamination group (n = 88). For the true-bacteremia cases that had only one set of positive blood cultures (n = 14), considering clinical and bacteriological data, additional cultures were performed on blood or other specimens. The same Corynebacterium spp. as in blood were isolated from these specimens. Receiver operating characteristic curves were generated, and the sensitivity and specificity of TTP were calculated for diagnosing true bacteremia. The median TTP of the true-bacteremia group (26.8 h) was shorter than that of the contamination group (43.3 h) (P < 0.0001). When considering TTP ≤ 25.0 h as true bacteremia, the sensitivity and specificity were 44.2% and 95.5%, respectively. Moreover, when considering TTP ≤ 69.4 h as true bacteremia, the sensitivity and specificity were 96.1% and 20.5%, respectively. Among the true-bacteremia groups with one set of positive blood cultures (n = 14), no case exhibited a TTP > 69.4 h. Only three cases showed TTP ≤ 25.0 h in the true-bacteremia group with one set of positive blood cultures. TTP > 69.4 h is likely to indicate contamination and may be useful to exclude true bacteremia in cases with one set of positive blood cultures. Meanwhile, diagnosing true bacteremia using the threshold of TTP 25.0 h would be difficult. Therefore, the clinical and bacteriological data are important for diagnosing bacteremia, especially in cases with TTP ≤ 69.4 h.
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Affiliation(s)
- Naoki Watanabe
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan
- Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori, Japan
- * E-mail:
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Kazufumi Yamagata
- Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori, Japan
| | - Miyuki Fujioka
- Graduate School of Health Sciences, Hirosaki University, Hirosaki, Aomori, Japan
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Yoshikawa Y, Nakashita T, Motojima S, Otsuka Y. [THE CORRELATION OF ALLERGY SPECIFIC IGE MEASUREMENT REAGENT IMMNOCAP, ALASTAT, AND ORITON IGE]. Arerugi 2022; 71:112-119. [PMID: 35296601 DOI: 10.15036/arerugi.71.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND The reagent which is available for single allergenic tests is Oriton IgE, ImmnoCAP, Alastat in Japan. No study has investigated the correlations of Oriton IgE and ImmnoCAP or Alastat, and, used for specific IgE antibody testing. METHOD Six frequently tested allergens (dust mite, cedar pollen, dog dander, egg white, milk, and candida) were measured by three methods, and Spearman rank correlation coefficient and class-judged agreement were evaluated. Furthermore, we did the evaluation like other 2 methods when we made small short sample volumes of Oriton IgE. RESULT As for the examination result of Oriton IgE and ImmnoCAP or Alastat, constant correlation was confirmed. However, the tendency was a different result by assay method and an allergenic item. No significant differences were observed in the results of the Oriton IgE test when standard sample volumes and small short sample volumes were used. CONCLUSION These comparison results help us to understand each characteristic and select an optimal test method. In addition, it can be inferred that it is beneficial to choose tests requiring small sample volumes in pediatric patients.
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Ogura K, Kaji D, Sasaki M, Otsuka Y, Takemoto N, Miyoshi-Akiyama T, Kikuchi K. Predominance of ST8 and CC1/spa-t1784 methicillin-resistant Staphylococcus aureus isolates in Japan and their genomic characteristics. J Glob Antimicrob Resist 2022; 28:195-202. [DOI: 10.1016/j.jgar.2022.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 01/06/2022] [Accepted: 01/17/2022] [Indexed: 11/16/2022] Open
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21
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Taniguchi J, Nakashima K, Matsui H, Watari T, Otsuki A, Ito H, Otsuka Y. Low cut-off value of serum (1,3)-beta-D-glucan for the diagnosis of Pneumocystis pneumonia in non-HIV patients: a retrospective cohort study. BMC Infect Dis 2021; 21:1200. [PMID: 34844554 PMCID: PMC8628137 DOI: 10.1186/s12879-021-06895-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 11/17/2021] [Indexed: 11/10/2022] Open
Abstract
Background Non-human immunodeficiency virus (HIV) Pneumocystis pneumonia (PCP) is a fulminant disease with an increasing incidence. The serum beta-d-glucan (BDG) assay is used as an adjunct to the diagnosis of PCP; however, the cut-off value for this assay is not well-defined, especially in the non-HIV PCP population. Therefore, we aimed to identify the assay cut-off value for this population. Methods In this retrospective observational study, we reviewed the medical records of all patients (≥ 18 years old) with clinical suspicion of PCP who underwent evaluation of respiratory tract specimens between December 2008 and June 2014 at Kameda Medical Center. We created a receiver operating characteristic curve and calculated the area under the curve to determine the cut-off value for evaluating the inspection accuracy of the BDG assay. Results A total of 173 patients were included in the study. Fifty patients showed positive results in specimen staining, loop-mediated isothermal amplification assay, and polymerase chain reaction test, while 123 patients showed negative results. The receiver operating characteristic analyses suggested that the BDG cut-off level was 8.5 pg/mL, with a sensitivity and specificity of 76% and 76%, respectively. Conclusions The Wako-BDG cut-off value for the diagnosis of non-HIV PCP is 8.5 pg/mL, which is lower than the classical cut-off value from previous studies. Clinicians should potentially consider this lower BDG cut-off value in the diagnosis and management of patients with non-HIV PCP. Trial registration: The participants were retrospectively registered. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-021-06895-x.
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Affiliation(s)
- Jumpei Taniguchi
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Kei Nakashima
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan.
| | - Hiroki Matsui
- Department of Clinical Epidemiology and Health Economics, School of Public Health, The University of Tokyo, Tokyo, Japan.,Clinical Research Support Office, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Ayumu Otsuki
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Hiroyuki Ito
- Department of Pulmonology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan
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22
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Abstract
Corynebacterium bacteremia is most commonly caused by C. striatum or C. jeikeium. To determine differences in clinical characteristics of patients with bacteremia caused by Corynebacterium striatum, C. jeikeium, and other species of Corynebacterium, we retrospectively reviewed medical records of patients in Japan who had Corynebacterium bacteremia during January 2014–May 2020. Of the 115 records evaluated, 60 (52%) were cases of true bacteremia and 55 (48%) were cases of contamination. Proportions of true bacteremia cases caused by C. striatum (70%) and by C. jeikeium (71%) were significantly higher than those caused by other species of Corynebacterium (9%). These 2 organisms were commonly detected in blood cultures of patients with hematologic malignancies and neutropenia. The mortality rates at 90 days were 34% (C. striatum), 30% (C. jeikeium), and 0 (other species). Given the high mortality rates, assessing true bacteremia when C. striatum or C. jeikeium is detected in blood cultures, especially in patients with hematologic malignancy, is warranted.
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23
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Hase R, Kurita T, Mito H, Yano Y, Watari T, Otsuka Y, Oshima N, Noguchi Y. Potential for false-positive results with quantitative antigen tests for SARS-CoV-2: A case of a child with acute respiratory infection. J Infect Chemother 2021; 28:319-320. [PMID: 34794870 PMCID: PMC8585597 DOI: 10.1016/j.jiac.2021.10.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/22/2021] [Accepted: 10/30/2021] [Indexed: 11/25/2022]
Abstract
The quantitative antigen test based on the chemiluminescent enzyme immunoassay for SARS-CoV-2 has been used in international airports for quarantine in Japan. While cases of false-positive rapid antigen tests for SARS-CoV-2 were reported, false-positive cases of the quantitative antigen test with clinical information are rare. Here, we report a case of acute respiratory infection whose quantitative antigen test for SARS-CoV-2 was suspected to be false positive. A 9-month-old boy who presented with fever and rhinorrhea was admitted to our hospital under the Quarantine Act. He was diagnosed with COVID-19 based on the quantitative antigen test for SARS-CoV-2 performed at the quarantine station. None of the accompanying family members were positive for COVID-19. Nucleic acid amplification tests (NAAT) for SARS-CoV-2 were all negative, and multiplex polymerase chain reaction detected human rhinovirus or enterovirus infection. This case suggests that the results of the quantitative antigen test should be interpreted together with clinical information, and NAAT should be performed when false-positive results are suspected to avoid unnecessary isolation.
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Affiliation(s)
- Ryota Hase
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iida-cho, Narita, Chiba, 286-8523, Japan; Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Chiba, Japan, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
| | - Takashi Kurita
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iida-cho, Narita, Chiba, 286-8523, Japan
| | - Haruki Mito
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iida-cho, Narita, Chiba, 286-8523, Japan
| | - Yudai Yano
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iida-cho, Narita, Chiba, 286-8523, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, Kamogawa, Chiba, Japan, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Nozomu Oshima
- Department of Pediatrics, Japanese Red Cross Narita Hospital, 90-1 Iida-cho, Narita, Chiba, 286-8523, Japan
| | - Yasushi Noguchi
- Department of Pediatrics, Japanese Red Cross Narita Hospital, 90-1 Iida-cho, Narita, Chiba, 286-8523, Japan
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24
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Itoh N, Murakami H, Ishibana Y, Yoshida M, Watari T, Otsuka Y. A case of Salmonella osteomyelitis mimicking a malignant tumor of the humerus in an immunocompetent adult patient identified using broad-range polymerase chain reaction with sequencing of a biopsied specimen. J Infect Chemother 2021; 27:1769-1773. [PMID: 34400093 DOI: 10.1016/j.jiac.2021.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/22/2021] [Accepted: 08/10/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Salmonella infections are associated with gastroenteritis, enteric fever, bacteremia, focal infection, and chronic carrier state. Cases of Salmonella osteomyelitis are uncommon and mainly occur in individuals with immunosuppressive conditions. Herein, we report a case of Salmonella osteomyelitis that required differentiation from malignancy in an immunocompetent adult patient. CASE PRESENTATION A 31-year-old previously healthy male truck driver presented with a 2-week history of pain in his left upper arm. He had fallen off the back of a truck 2 months previously and injured the left side of his body. He also had bloody diarrhea and fever. Computed tomography and magnetic resonance imaging revealed a lesion that appeared to be a bone tumor in the left humerus, and the patient was referred to our cancer center from another clinic. Culture of a biopsy specimen of the left humerus was negative; however, the consensus sequence in broad-range polymerase chain reaction (PCR) showed the highest similarity to the 16S rRNA gene of Salmonella enterica subspecies enterica. Curettage of the left humerus was performed, and the patient was administered levofloxacin for 6 weeks. He recovered left arm function and had no recurrence during 2 months of follow-up. CONCLUSIONS When the culture of blood or biopsy specimens is negative in situations wherein a specific infection is suspected, broad-range PCR with sequencing should be considered to determine the causative organism.
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Affiliation(s)
- Naoya Itoh
- Division of Infectious Diseases, Aichi Cancer Center Hospital, 1-1 Kanokoden Chikusa-ku, Nagoya, Aichi, 464-8681, Japan; Collaborative Chairs Emerging and Reemerging Infectious Diseases, National Center for Global Health and Medicine, Graduate School of Medicine, Tohoku University, 2-1 Seiryo-machi Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
| | - Hiromi Murakami
- Division of Infectious Diseases, Aichi Cancer Center Hospital, 1-1 Kanokoden Chikusa-ku, Nagoya, Aichi, 464-8681, Japan
| | - Yuichi Ishibana
- Division of Infectious Diseases, Aichi Cancer Center Hospital, 1-1 Kanokoden Chikusa-ku, Nagoya, Aichi, 464-8681, Japan
| | - Masahiro Yoshida
- Section of Orthopedic Surgery, Aichi Cancer Center Hospital, 1-1 Kanokoden Chikusa-ku, Nagoya, Aichi, 464-8681, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan
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25
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Takahashi Y, Osawa R, Kubota Y, Fujii M, Matsuda N, Watanabe N, Watari T, Otsuka Y, Hosokawa N. Early diagnosis of Cryptococcus neoformans var. grubii meningitis using multiplex PCR assay in an immunocompetent patient. J Infect Chemother 2021; 27:1765-1768. [PMID: 34393039 DOI: 10.1016/j.jiac.2021.08.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/14/2021] [Accepted: 08/07/2021] [Indexed: 12/01/2022]
Abstract
Cryptococcosis is an invasive fungal infection that mainly affects the lungs and central nervous system. While patients with cell-mediated immunodeficiency are at high risk of developing cryptococcosis, there have been increasing reports of cryptococcosis in immunocompetent individuals with no underlying conditions. Herein, we report a case of cryptococcal meningitis in a 55-year-old apparently immunocompetent man with a history of heavy alcohol consumption. Although the patient was initially treated for tuberculous meningitis and varicella-zoster virus induced vasculopathy due to a history of exposure to tuberculosis and a presence of stroke, a multiplex polymerase chain reaction (PCR) assay of cerebrospinal fluid (CSF) identified Cryptococcus species unexpectedly, enabling swift treatment and a favorable clinical outcome. The multiplex PCR assay, which can identify multiple pathogens simultaneously and instantly, may lead to early diagnosis and treatment by detecting unanticipated pathogens. Furthermore, the strain was identified through multilocus sequence typing (MLST) analysis as Cryptococcus neoformans var. grubii, Sequence Type 5, molecular type: VNI. Although simplified microbial identification techniques such as mass spectrometry have recently been developed, molecular biological assays are still essential for the accurate identification of infectious strains.
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Affiliation(s)
- Yoshinori Takahashi
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan.
| | - Ryosuke Osawa
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Yoshifumi Kubota
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Motoki Fujii
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Naoya Matsuda
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Naoki Watanabe
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Tomohisa Watari
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, Japan
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26
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Nagentrau M, Mohd Tobi AL, Jamian S, Otsuka Y, Hussin R. Delamination-fretting wear failure evaluation at HAp-Ti-6Al-4V interface of uncemented artificial hip implant. J Mech Behav Biomed Mater 2021; 122:104657. [PMID: 34246851 DOI: 10.1016/j.jmbbm.2021.104657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 05/06/2021] [Accepted: 06/24/2021] [Indexed: 10/20/2022]
Abstract
Present research aims to develop a finite element computational model to examine delamination-fretting wear behaviour that can suitably mimic actual loading conditions at HAp-Ti-6Al-4V interface of uncemented hip implant femoral stem component. A simple finite element contact configuration model based on fretting fatigue experimental arrangement subjected to different mechanical and tribological properties consist of contact pad (bone), HAp coating and Ti-6Al-4V substrate are developed using adaptive wear modelling approach adopting modified Archard wear equation to be examined under static simulation. The developed finite element model is validated and verified with reported literatures. The findings revealed that significant delamination-fretting wear is recorded at contact edge (leading edge) as a result of substantial contact pressure and contact slip driven by stress singularity effect. The delamination-fretting wear behaviour is promoted under higher delamination length, lower normal loading with higher fatigue loading, increased porous (cancellous) and cortical bone elastic modulus with higher cycle number due to significant relative slip amplitude as the result of reduced interface rigidity. Tensile-compressive condition (R=-1) experiences most significant delamination-fretting wear behaviour (8 times higher) compared to stress ratio R=0.1 and R=10.
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Affiliation(s)
- M Nagentrau
- School of Computer Science and Engineering, Faculty of Innovation and Technology, Taylor's University, Taylor's Lakeside Campus, Selangor, Subang Jaya, Malaysia; Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor, Malaysia.
| | - A L Mohd Tobi
- Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor, Malaysia
| | - S Jamian
- Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor, Malaysia
| | - Y Otsuka
- Department of Mechanical Engineering, Nagaoka University of Technology, Japan
| | - R Hussin
- Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor, Malaysia
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27
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Takaoka H, Fukuda M, Otsuka Y, Iwasa M. A male black fly of Simulium (Simulium) iwatense (Shiraki) (Diptera: Simuliidae) with genitalia-like appendages on abdominal segment 8. Trop Biomed 2021; 38:68-71. [PMID: 33973575 DOI: 10.47665/tb.38.2.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A rare non-sex mosaic abnormality represented by genitalia-like appendages on the ventral surface of abdominal segment 8 of a male black fly collected in Hokkaido, Japan, is reported. The appendages consist of a pair of style-like projections each arising from a coxite-like base, inverted-Y shaped ventral plate-like structure, and isolated round structure. This male was morphologically and molecularly identified as an abnormal form of S. (S.) iwatense (Shiraki), the only species in the Simulium (Simulium) ornatum species-group in Japan, although certain morphological characteristics of this male including the reduced number of uppereye (large) facets and elongate cerci are different from those of S. (S.) iwatense.
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Affiliation(s)
- H Takaoka
- Tropical Infectious Diseases Research and Education Centre (TIDREC), Higher Institution Centre of Excellence (HICoE), Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - M Fukuda
- Institute for Research Promotion, Oita University, Idaigaoka 1-1, Hasama, Yufu, Oita 879-5593, Japan
| | - Y Otsuka
- Research Center for the Pacific Islands, Kagoshima University, Korimoto 1-21-24, Kagoshima, Kagoshima 890-8580, Japan
| | - M Iwasa
- Obihiro University of Agriculture and Veterinary Medicine, Inada-cho, Obihiro, Hokkaido 080-8555, Japan
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28
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Abe M, Kimura M, Maruyama H, Watari T, Ogura S, Takagi S, Uchida N, Otsuka Y, Taniguchi S, Araoka H. Clinical characteristics and drug susceptibility patterns of Corynebacterium species in bacteremic patients with hematological disorders. Eur J Clin Microbiol Infect Dis 2021; 40:2095-2104. [PMID: 33895886 DOI: 10.1007/s10096-021-04257-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/15/2021] [Indexed: 01/13/2023]
Abstract
The aim of this study was to clarify the clinical and microbiological characteristics of Corynebacterium bacteremia in hematological patients. We retrospectively reviewed the medical records of patients with Corynebacterium bacteremia from April 2013 to June 2018. The causative Corynebacterium species were identified using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Drug susceptibility tests were performed using the broth microdilution method recommended by the Clinical and Laboratory Standards Institute. In total, 147 cases of Corynebacterium bacteremia were identified during the study period. Corynebacterium striatum was the most frequent pathogen. Catheter-related bloodstream infection was diagnosed in 19.7% of all patients, and moderate/severe oral or severe gastrointestinal mucosal impairment was detected in 19.7%. Polymicrobial infection was found in about 20% of cases, with Enterococcus faecium being the most frequent isolate. The overall 30-day mortality was 34.7% (51/147). Multivariate analysis showed that E. faecium co-infection (odds ratio (OR) 9.3; 95% confidence interval (CI) 2.1-40), systemic corticosteroids (OR 3.6; 95% CI 1.4-8.9), other immunosuppressive drugs (OR 0.32; 95% CI 0.13-0.76), and a Pitt bacteremia score ≥4 (OR 12; 95% CI 3.9-40) were significant risk factors for overall 30-day mortality. The drug susceptibility rates for beta-lactam antimicrobial agents were quite low. All isolates were susceptible to glycopeptides and linezolid. However, some C. striatum isolates were resistant to daptomycin. Corynebacterium bacteremia can occur in the presence of several types of mucosal impairment. Our drug susceptibility data indicate that Corynebacterium bacteremia in hematological patients could be treated by glycopeptides or linezolid.
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Affiliation(s)
- Masahiro Abe
- Department of Infectious Diseases, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan.
| | - Muneyoshi Kimura
- Department of Infectious Diseases, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | - Hideyuki Maruyama
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Tomohisa Watari
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Sho Ogura
- Department of Infectious Diseases, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan
| | | | - Naoyuki Uchida
- Department of Hematology, Toranomon Hospital, Tokyo, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | | | - Hideki Araoka
- Department of Infectious Diseases, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan.,Okinaka Memorial Institute for Medical Research, Tokyo, Japan
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29
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Kamata K, Watanabe T, Minaga K, Hara A, Sekai I, Otsuka Y, Yoshikawa T, Park AM, Kudo M. Gut microbiome alterations in type 1 autoimmune pancreatitis after induction of remission by prednisolone. Clin Exp Immunol 2020; 202:308-320. [PMID: 32880930 DOI: 10.1111/cei.13509] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 08/12/2020] [Accepted: 08/23/2020] [Indexed: 12/15/2022] Open
Abstract
Although increasing evidence demonstrates the association between intestinal dysbiosis and pancreatic diseases such as chronic pancreatitis and pancreatic cancer, it remains largely unknown whether intestinal dysbiosis is involved in the immunopathogenesis of autoimmune pancreatitis (AIP). Recently, we found that intestinal dysbiosis mediates experimental AIP via the activation of plasmacytoid dendritic cells (pDCs), which can produce interferon (IFN)-α and interleukin (IL)-33. However, candidate intestinal bacteria, which promote the development of AIP, have not been identified. Fecal samples were obtained from type 1 AIP patients before and after prednisolone (PSL) treatment and subjected to 16S ribosomal RNA sequencing to evaluate the composition of intestinal bacteria. Induction of remission by PSL was associated with the complete disappearance of Klebsiella species from feces in two of the three analyzed patients with type 1 AIP. To assess the pathogenicity of Klebsiella species, mild experimental AIP was induced in MRL/MpJ mice by repeated injections of 10 μg of polyinosinic-polycytidylic acid [poly(I:C)], in combination with oral administration of heat-killed Klebsiella pneumoniae. The AIP pathology score was significantly higher in MRL/MpJ mice that received both oral administration of heat-killed K. pneumoniae and intraperitoneal injections of poly(I:C) than in those administered either agent alone. Pancreatic accumulation of pDCs capable of producing large amounts of IFN-α and IL-33 was also significantly higher in mice that received both treatments. These data suggest that intestinal colonization by K. pneumoniae may play an intensifying role in the development of type 1 AIP.
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Affiliation(s)
- K Kamata
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - T Watanabe
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - K Minaga
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - A Hara
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - I Sekai
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - Y Otsuka
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - T Yoshikawa
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - A-M Park
- Department of Microbiology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
| | - M Kudo
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama, Osaka, Japan
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30
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Affiliation(s)
- Y Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - M Yasuda
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - K Tokumasu
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - K Hasegawa
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
| | - F Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kita-ku, Okayama 700-8558, Japan
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31
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Kato R, Fukushima H, Kijima T, Yoshida S, Yokoyama M, Ishioka J, Matsuoka Y, Saito K, Otsuka Y, Koga F, Yano M, Tsukamoto T, Masuda H, Okuno T, Yonese J, Nagahama K, Kamata S, Noro A, Kageyama Y, Tsujii T, Morimoto S, Fujii Y. Predictive performance of the qSOFA score for in-hospital mortality of obstructive pyelonephritis patients: A multi-institutional study. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33590-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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32
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Kakehi E, Kotani K, Otsuka Y, Fukuyasu Y, Hashimoto Y, Sakurai S, Hirotani A, Simizu K, Fujita R, Shoji K, Adachi S, Matsumura M. Response to: Kimura's disease: effects of age on clinical presentation. QJM 2020; 113:383. [PMID: 32091606 DOI: 10.1093/qjmed/hcaa035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- E Kakehi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - K Kotani
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Y Otsuka
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - Y Fukuyasu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - Y Hashimoto
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - S Sakurai
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - A Hirotani
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - K Simizu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - R Fujita
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - K Shoji
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - S Adachi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori 680-8501, Japan
| | - M Matsumura
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Kakehi E, Kotani K, Otsuka Y, Fukuyasu Y, Hashimoto Y, Sakurai S, Hirotani A, Simizu K, Fujita R, Shoji K, Adachi S, Matsumura M. Kimura's disease: effects of age on clinical presentation. QJM 2020; 113:336-345. [PMID: 31800058 DOI: 10.1093/qjmed/hcz312] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 11/11/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Kimura's disease (KD) is known to be dominant among young Asian men, but it can also occur in middle- and advanced-aged people. The clinical characteristics of KD, especially by age, are not well known. AIM This study was performed to investigate the effects of age on the clinical characteristics of KD. DESIGN We conducted a case series study. METHODS All case studies of patients diagnosed with KD were collected via a PubMed search of studies published until August 2018. The data were analyzed by age group. RESULTS In total, 215 studies were reviewed (238 patients; mean age of 36 years). The male:female ratio was 4:1 overall, 17:1 in patients aged <20 years, 4:1 in patients aged 20-39 years and 2:1 in patients aged ≥40 years (P = 0.01). The percentage of patients with pruritus was 15.4% overall, 3.8% in patients aged <20 years, 15.5% in patients aged 20-39 years and 21.7% in patients aged ≥40 years (P = 0.02). The time to diagnosis was 5.3 years overall, 3.2 years in patients aged <20 years, 4.7 years in patients aged 20-39 years and 7.1 years in patients aged ≥40 years (P < 0.01). CONCLUSIONS The proportion of female patients affected the incidence of pruritus, and the time to diagnosis increased as the patients' age increased. There were no significant age-related differences in region/race, complications, multiplicity, laterality, anatomical distribution, maximum size, eosinophil count, immunoglobulin E level, initial treatment, recurrence or outcomes. This may be useful information for the diagnosis of KD.
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Affiliation(s)
- E Kakehi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - K Kotani
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Y Otsuka
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - Y Fukuyasu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - Y Hashimoto
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - S Sakurai
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - A Hirotani
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - K Simizu
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - R Fujita
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - K Shoji
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - S Adachi
- Department of General Medicine, Tottori Municipal Hospital, 1-1 Matoba, Tottori-City, Tottori, Japan
| | - M Matsumura
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Sando E, Suzuki M, Furumoto A, Asoh N, Yaegashi M, Aoshima M, Ishida M, Hamaguchi S, Otsuka Y, Morimoto K. Corrigendum to “Impact of the pediatric 13-valent pneumococcal conjugate vaccine on serotype distribution and clinical characteristics of pneumococcal pneumonia in adults: The Japan Pneumococcal Vaccine Effectiveness Study (J-PAVE)” [Vaccine 37 (2019) 2687–2693]. Vaccine 2020; 38:3404. [DOI: 10.1016/j.vaccine.2020.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Tsunoda A, Otsuka Y, Toguchi A, Watanabe K, Nishino R, Takahashi T. Survey on bacterial contamination of bidet toilets and relation to the interval of scrubbing these units. J Water Health 2019; 17:863-869. [PMID: 31850894 DOI: 10.2166/wh.2019.234] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Abstract
We conducted a survey to investigate the distribution of bacteria recovered from the bidet toilets at a district hospital. The nozzle surface and spray water of 192 bidet toilets were sampled for contamination. Of the 192 toilets sampled, the nozzle surface of 167 (87%) and the spray water of 181 (94%) were found to be contaminated by one or more of the following organisms: Enterobacteriaceae, Enterococcus spp., Staphylococcus spp., non-glucose-fermenting rods, other Gram-negative bacteria, other Gram-positive bacteria, and Candida spp. An extended spectrum of β-lactamase producing Escherichia coli was found in one nozzle surface and one spray water. The frequency of colonization with 104 or more recovered from the nozzle surface was significantly greater in the toilets scrubbed every week than that in the units scrubbed every day, but that from the spray water was not significantly different between the groups. The nozzle surface and the spray water in the bidet toilets were contaminated with a wide range of bacteria. Because the interval of scrubbing the toilets did not have an influence on the contamination of the spray water, self-cleaning mechanisms of spray water should be developed to prevent patients' possible infections.
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Affiliation(s)
- Akira Tsunoda
- Department of Gastroenterological Surgery, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan E-mail:
| | - Yoshihito Otsuka
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan
| | - Akihiro Toguchi
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan
| | - Kumiko Watanabe
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan
| | - Ryou Nishino
- Department of Clinical Laboratory, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan
| | - Tomoko Takahashi
- Department of Gastroenterological Surgery, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba 296-8602, Japan E-mail:
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Amano J, Hase R, Otsuka Y, Tsuchimochi T, Noguchi Y, Igarashi S. Catheter-related bloodstream infection by Microbacterium paraoxydans in a pediatric patient with B-cell precursor acute lymphocytic leukemia: A case report and review of literature on Microbacterium bacteremia. J Infect Chemother 2019; 25:806-810. [PMID: 30982728 DOI: 10.1016/j.jiac.2019.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/10/2019] [Accepted: 03/15/2019] [Indexed: 11/29/2022]
Abstract
Microbacterium species are coryneform gram-positive rods that are widely distributed in the environment and have been recently recognized as rare pathogens in humans. However, information about the epidemiologic and clinical characteristics of Microbacterium species is scarce. We herein reported an 11-year-old girl with acute leukemia who was found to have catheter-related bloodstream infection in her neutropenic phase. Gram-positive bacilli repeatedly grew on the blood cultures and were later confirmed by 16S rRNA analysis as Microbacterium paraoxydans. A literature review found available clinical courses in 21 cases (7 pediatric cases) of Microbacterium spp. bacteremia. Our case and those in literature suggested that Microbacterium spp. bacteremia often occurs in patients with indwelling central venous catheters; the literature review further suggested that removal of central venous catheters is required in most cases and that 16S rRNA sequence was useful in identifying in detail the species of Microbacterium.
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Affiliation(s)
- Jun Amano
- Department of Pediatric Hematology and Oncology, Japanese Red Cross Narita Hospital, Narita, Chiba, Japan
| | - Ryota Hase
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, Narita, Chiba, Japan; Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Chiba, Japan.
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Taichiro Tsuchimochi
- Department of Pediatric Hematology and Oncology, Japanese Red Cross Narita Hospital, Narita, Chiba, Japan
| | - Yasushi Noguchi
- Department of Pediatric Hematology and Oncology, Japanese Red Cross Narita Hospital, Narita, Chiba, Japan
| | - Shunji Igarashi
- Department of Pediatric Hematology and Oncology, Japanese Red Cross Narita Hospital, Narita, Chiba, Japan
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Sando E, Suzuki M, Furumoto A, Asoh N, Yaegashi M, Aoshima M, Ishida M, Hamaguchi S, Otsuka Y, Morimoto K. Impact of the pediatric 13-valent pneumococcal conjugate vaccine on serotype distribution and clinical characteristics of pneumococcal pneumonia in adults: The Japan Pneumococcal Vaccine Effectiveness Study (J-PAVE). Vaccine 2019; 37:2687-2693. [PMID: 30975569 DOI: 10.1016/j.vaccine.2019.04.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 04/02/2019] [Accepted: 04/04/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND The pediatric 13-valent pneumococcal conjugate vaccine (PCV13) was included in the pediatric immunization programme in Japan in late 2013. The impact of vaccination on the serotype distribution and clinical characteristics of pneumococcal pneumonia has not been described. METHODS The first phase of this multicentre prospective study was conducted at community-based hospitals in Japan from 2011 to 2014. The second phase was conducted from 2016 to 2017. Pneumococcal isolates and clinical data were collected from patients with community-acquired pneumonia who were ≥15 years of age. Patients were classified by pneumococcal serotype to PCV13 serotype, 23-valent pneumococcal polysaccharide vaccine (PPV23) non-PCV13 serotype, and non-vaccine serotype. RESULTS A total of 484 patients were enrolled, 241 in the first phase and 243 in the second. The proportion of PCV13 serotypes decreased from 53% to 33% (p < 0.001), whereas PPV23 non-PCV13 serotypes did not change (p = 0.754). PCV13 serotypes were associated with increased risk of elevated blood urea nitrogen (adjusted odds ratio 2.49; 95% confidence interval: 1.49-4.16) and hospitalization (adjusted odds ratio 1.74; 95% confidence interval: 1.02-2.95). These associations were not observed in patients with PPV23 non-PCV13 serotypes. CONCLUSIONS The occurrence of pneumococcal pneumonia caused by vaccine-covered serotypes dramatically decreased following the introduction of pediatric PCV13. The PCV13 serotypes were associated with pneumonia severity.
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Affiliation(s)
- Eiichiro Sando
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan; Department of General Internal Medicine, Kameda Medical Center, Chiba, Japan
| | - Motoi Suzuki
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Akitsugu Furumoto
- Department of Infectious Diseases, Nagasaki Rosai Hospital, Nagasaki, Japan
| | - Norichika Asoh
- Department of Internal Medicine, Juzenkai Hospital, Nagasaki, Japan
| | - Makito Yaegashi
- Department of General Internal Medicine, Kameda Medical Center, Chiba, Japan
| | | | - Masayuki Ishida
- Department of Respiratory Medicine, Chikamori Hospital, Kochi, Japan
| | - Sugihiro Hamaguchi
- Department of General Internal Medicine, Fukushima Medical University, Fukushima, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Chiba, Japan
| | - Konosuke Morimoto
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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38
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Affiliation(s)
- Y Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan
| | - K Harada
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan
| | - F Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1 Shikata-cho, Kitaku, Okayama, Japan
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Hagiwara A, Otsuka Y, Hori M, Tachibana Y, Yokoyama K, Fujita S, Andica C, Kamagata K, Irie R, Koshino S, Maekawa T, Chougar L, Wada A, Takemura MY, Hattori N, Aoki S. Improving the Quality of Synthetic FLAIR Images with Deep Learning Using a Conditional Generative Adversarial Network for Pixel-by-Pixel Image Translation. AJNR Am J Neuroradiol 2019; 40:224-230. [PMID: 30630834 DOI: 10.3174/ajnr.a5927] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 11/15/2018] [Indexed: 12/16/2022]
Abstract
BACKGROUND AND PURPOSE Synthetic FLAIR images are of lower quality than conventional FLAIR images. Here, we aimed to improve the synthetic FLAIR image quality using deep learning with pixel-by-pixel translation through conditional generative adversarial network training. MATERIALS AND METHODS Forty patients with MS were prospectively included and scanned (3T) to acquire synthetic MR imaging and conventional FLAIR images. Synthetic FLAIR images were created with the SyMRI software. Acquired data were divided into 30 training and 10 test datasets. A conditional generative adversarial network was trained to generate improved FLAIR images from raw synthetic MR imaging data using conventional FLAIR images as targets. The peak signal-to-noise ratio, normalized root mean square error, and the Dice index of MS lesion maps were calculated for synthetic and deep learning FLAIR images against conventional FLAIR images, respectively. Lesion conspicuity and the existence of artifacts were visually assessed. RESULTS The peak signal-to-noise ratio and normalized root mean square error were significantly higher and lower, respectively, in generated-versus-synthetic FLAIR images in aggregate intracranial tissues and all tissue segments (all P < .001). The Dice index of lesion maps and visual lesion conspicuity were comparable between generated and synthetic FLAIR images (P = 1 and .59, respectively). Generated FLAIR images showed fewer granular artifacts (P = .003) and swelling artifacts (in all cases) than synthetic FLAIR images. CONCLUSIONS Using deep learning, we improved the synthetic FLAIR image quality by generating FLAIR images that have contrast closer to that of conventional FLAIR images and fewer granular and swelling artifacts, while preserving the lesion contrast.
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Affiliation(s)
- A Hagiwara
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.) .,Department of Radiology (A.H., R.I., S.K., T.M.), Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Y Otsuka
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.).,Milliman Inc (Y.O.). Tokyo, Japan
| | - M Hori
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
| | - Y Tachibana
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.).,Applied MRI Research (Y.T.), Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences, Chiba, Japan
| | - K Yokoyama
- Neurology (K.Y., N.H.), Juntendo University School of Medicine, Tokyo, Japan
| | - S Fujita
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
| | - C Andica
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
| | - K Kamagata
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
| | - R Irie
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.).,Department of Radiology (A.H., R.I., S.K., T.M.), Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - S Koshino
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.).,Department of Radiology (A.H., R.I., S.K., T.M.), Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - T Maekawa
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.).,Department of Radiology (A.H., R.I., S.K., T.M.), Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - L Chougar
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.).,Department of Radiology (L.C.), Hopital Saint-Joseph, Paris, France; and Department of Radiological Sciences
| | - A Wada
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
| | - M Y Takemura
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
| | - N Hattori
- Neurology (K.Y., N.H.), Juntendo University School of Medicine, Tokyo, Japan
| | - S Aoki
- From the Departments of Radiology (A.H., Y.O., M.H., Y.T., S.F., C.A., K.K., R.I., S.K., T.M., L.C., A.W., M.Y.T., S.A.)
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Hayano S, Yamamoto S, Hase R, Toguchi A, Otsuka Y, Hosokawa N. 1045. A Multicenter Propensity Score-Adjusted Retrospective Study for Comparison of the Outcome of Treatment With Third-Generation Cephalosporin vs. Broad-Spectrum Antibiotics for Enterobacter Bacteremia. Open Forum Infect Dis 2018. [PMCID: PMC6255107 DOI: 10.1093/ofid/ofy210.882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background Enterobacter spp. can develop resistance during prolonged therapy with third-generation cephalosporins (3GC: ceftriaxone, cefotaxime, or ceftazidime) because of derepression of AmpC β-lactamase. However, the clinical significance of this phenomena remains undetermined. This study aims to assess the outcome of patients with 3GC-susceptible Enterobacter bacteremia (EB) who received definite therapy with 3GC or broad-spectrum antibiotics (BSA) using propensity score analysis. Methods In this retrospective, cohort study conducted at two tertiary care hospitals in Japan, we determined consecutive patients with EB identified from the laboratory databases between January 2010 and December 2017. We enrolled patients with 3GC-susceptible EB treated with 3GC or BSA (defined as fourth-generation cephalosporins, carbapenems, and piperacillin/tazobactam) as definitive therapy. The primary outcome was 28-day mortality. The secondary outcome was the emergence of antimicrobial-resistant strain during antimicrobial therapy. We compared outcomes using the propensity scores and inverse-probability-weighting (IPW) adjustment to decrease the confounding by indication. Results We identified 320 patients with EB; of these, 191 cases were eligible (86 treated with 3GC and 105 treated with BSA). All the measured covariates were well balanced after the IPW adjustment. We observed no significant differences in the unadjusted mortality [5.8% in the 3GC group vs. 13.3% in the BSA group; risk difference, −7.5%; 95% confidence interval (CI): −15.7–0.6; P = 0.09], and the IPW-adjusted mortality (5.1% vs. 9.4%; risk difference −4.3%; 95% CI: −12.2–3.5; P = 0.3) between the groups. The results of the propensity score-matched analysis and sensitivity analysis were similar. Furthermore, we did not observe the emergence of antimicrobial resistance during antimicrobial therapy in both groups. Conclusion Definitive therapy with 3GC for susceptible EB was not associated with an increased risk of the 28-day mortality after adjustment for potential confounders with the propensity score analysis or with the emergence of antimicrobial-resistant strain. Disclosures All authors: No reported disclosures.
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Affiliation(s)
- Satoshi Hayano
- Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Japan
| | - Shungo Yamamoto
- Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Kyoto City, Kyoto, Japan
| | - Ryota Hase
- Department of Infectious Diseases, Narita Red Cross Hospital, Narita, Chiba, Japan
| | - Akihiro Toguchi
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Chiba, Japan
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Shimizu A, Hase R, Suzuki D, Toguchi A, Otsuka Y, Hirata N, Hosokawa N. Lactococcus lactis cholangitis and bacteremia identified by MALDI-TOF mass spectrometry: A case report and review of the literature on Lactococcus lactis infection. J Infect Chemother 2018; 25:141-146. [PMID: 30100399 DOI: 10.1016/j.jiac.2018.07.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/30/2018] [Accepted: 07/17/2018] [Indexed: 12/16/2022]
Abstract
Lactococcus lactis is a rare causative organism in humans. Cases of L. lactis infection have only rarely been reported. However, because it is often difficult to identify by conventional commercially available methods, its incidence may be underestimated. We herein report the case of a 70-year-old man with cholangiocarcinoma who developed L. lactis cholangitis and review previously reported cases of L. lactis infection. Our case was confirmed by matrix-assisted desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). This case shows L. lactis is a potential causative pathogen of cholangitis and that MALDI-TOF MS can be useful for the rapid and accurate identification of L. lactis infection. We searched the literature for published case reports on cholangitis and any other infections caused by L. lactis, and thereby identified 36 cases, including our case. At least 66.7% (n = 24) of the cases had significant underlying conditions; 15 of the cases involved patients with an immunocompromised status. At least 41.7% (n = 15) had a significant food consumption history, such as the consumption of unpasteurized dairy products. The clinical sources of L. lactis were diverse and endocarditis was the most common diagnosis (n = 8), followed by hepatobiliary infection (n = 6), central nervous system infection (n = 5), and peritonitis (n = 4). The prognosis was favorable in most cases.
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Affiliation(s)
- Akihiko Shimizu
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan.
| | - Ryota Hase
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan; Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iidacho, Narita, Chiba, 2868523, Japan
| | - Daisuke Suzuki
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan
| | - Akihiro Toguchi
- Department of Laboratory Medicine, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan
| | - Nobuto Hirata
- Department of Gastroenterology, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan
| | - Naoto Hosokawa
- Department of Infectious Diseases, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, 2968602, Japan
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Hiraoka K, Kitamura S, Otsuka Y, Kawai K, Harada T, Ishikawa T. Effects of sperm direction in Piezo-ICSI on oocyte survival, fertilization, embryo development and implantation ability in humans: A preliminary study. J Obstet Gynaecol Res 2018; 44:1963-1969. [PMID: 29992667 DOI: 10.1111/jog.13727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 06/08/2018] [Indexed: 11/27/2022]
Abstract
AIMS The objective of this study was to investigate the effect of the head-first or tail-first injection of sperm into the cytoplasm by Piezo-ICSI (PICSI) on oocyte survival, fertilization, embryo development and implantation ability in humans. METHODS We retrospectively investigated 632 mature oocytes retrieved from 152 infertile patients who attended our PICSI-ET program at the Niji Clinic between October 2010 and January 2014. Of these, 342 mature oocytes retrieved from 75 patients were injected with sperm head first, and 290 mature oocytes retrieved from 77 patients were injected with sperm tail first into the cytoplasm. The rates of oocyte survival, fertilization, good-quality day-3 embryos, pregnancy, implantation and live birth were evaluated in both groups. RESULTS There were no differences among the two groups with respect to survival, fertilization, good-quality day-3 embryos, pregnancy, implantation and live birth rates. CONCLUSION Sperm direction (i.e., head first or tail first) does not influence the outcome of PICSI in human oocytes, including oocyte survival, fertilization, embryo development and implantation ability. These findings contribute to an understanding of factors that influence the success of human intracytoplasmic sperm injection (ICSI) techniques.
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Affiliation(s)
- Kenichiro Hiraoka
- Kameda Medical Center, Kamogawa-shi, Chiba, Japan.,Kameda IVF Clinic Makuhari, Mihama-ku, Chiba, Japan.,Tokyo Medical and Dental University, Tokyo, Japan
| | | | | | - Kiyotaka Kawai
- Kameda Medical Center, Kamogawa-shi, Chiba, Japan.,Kameda IVF Clinic Makuhari, Mihama-ku, Chiba, Japan.,Tokyo Medical and Dental University, Tokyo, Japan
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Suzuki M, Katsurada N, Le MN, Kaneko N, Yaegashi M, Hosokawa N, Otsuka Y, Aoshima M, Yoshida LM, Morimoto K. Effectiveness of inactivated influenza vaccine against laboratory-confirmed influenza pneumonia among adults aged ≥65 years in Japan. Vaccine 2018; 36:2960-2967. [PMID: 29685596 PMCID: PMC7126450 DOI: 10.1016/j.vaccine.2018.04.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/19/2018] [Accepted: 04/16/2018] [Indexed: 01/21/2023]
Abstract
BACKGROUND The effectiveness of inactivated influenza vaccine (IIV) against laboratory-confirmed influenza pneumonia in older adults remains to be established. METHODS Pneumonia patients aged ≥65 years who visited a study hospital in Chiba, Japan, were prospectively enrolled from February 2012 to January 2014. Sputum samples were collected from participants and tested for influenza virus by polymerase chain reaction assays. Influenza vaccine effectiveness (IVE) against laboratory-confirmed influenza pneumonia was estimated by a test-negative design. RESULTS Among a total of 814 pneumonia patients, 42 (5.2%) tested positive for influenza: 40 were positive for influenza A virus, and two were positive for influenza B virus. The IVE against laboratory-confirmed influenza pneumonia was 58.3% (95% confidence interval, 28.8-75.6%). The IVE against influenza pneumonia hospital admission, severe pneumonia, and death was 60.2% (95% CI, 22.8-79.4%), 65.5% (95% CI, 44.3-78.7%), and 71% (95% CI, -62.9% to 94.8%), respectively. In the subgroup analyses, the IVE against influenza pneumonia was higher for patients with immunosuppressive conditions (85.9%; 95% CI, 67.4-93.9%) than for those without (48.7%; 95% CI, 2.7-73%) but did not differ by patients' statin use status. CONCLUSION IIV effectively reduces the risk of laboratory-confirmed influenza pneumonia in older adults.
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Affiliation(s)
- Motoi Suzuki
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Adult Pneumonia Study Group-Japan, Japan.
| | - Naoko Katsurada
- Adult Pneumonia Study Group-Japan, Japan; Department of Pulmonology, Kameda Medical Center, Kamogawa, Japan; Division of Respiratory Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Minh Nhat Le
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Norihiro Kaneko
- Adult Pneumonia Study Group-Japan, Japan; Department of Pulmonology, Kameda Medical Center, Kamogawa, Japan
| | - Makito Yaegashi
- Adult Pneumonia Study Group-Japan, Japan; Department of General Internal Medicine, Kameda Medical Center, Kamogawa, Japan
| | - Naoto Hosokawa
- Adult Pneumonia Study Group-Japan, Japan; Department of Infectious Diseases, Kameda Medical Center, Kamogawa, Japan
| | - Yoshihito Otsuka
- Adult Pneumonia Study Group-Japan, Japan; Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Japan
| | - Masahiro Aoshima
- Adult Pneumonia Study Group-Japan, Japan; Department of Pulmonology, Kameda Medical Center, Kamogawa, Japan
| | - Lay Myint Yoshida
- Adult Pneumonia Study Group-Japan, Japan; Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Konosuke Morimoto
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Adult Pneumonia Study Group-Japan, Japan
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Hase R, Hirooka T, Itabashi T, Endo Y, Otsuka Y. Vertebral Osteomyelitis Caused by Helicobacter cinaedi Identified Using Broad-range Polymerase Chain Reaction with Sequencing of the Biopsied Specimen. Intern Med 2018; 57:1475-1477. [PMID: 29321407 PMCID: PMC5995724 DOI: 10.2169/internalmedicine.0012-17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A 65-year-old man presented with gradually exacerbating low back pain. Magnetic resonance imaging revealed vertebral osteomyelitis in the Th11-L2 vertebral bodies and discs. The patient showed negative findings on conventional cultures. Direct broad-range polymerase chain reaction (PCR) with sequencing of the biopsied specimen had the highest similarity to the 16S rRNA gene of Helicobacter cinaedi. This case suggests that direct broad-range PCR with sequencing should be considered when conventional cultures cannot identify the causative organism of vertebral osteomyelitis, and that this method may be particularly useful when the pathogen is a fastidious organism, such as H. cinaedi.
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Affiliation(s)
- Ryota Hase
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, Japan
| | - Takuya Hirooka
- Department of Orthopedics, Japanese Red Cross Narita Hospital, Japan
| | - Takashi Itabashi
- Department of Orthopedics, Japanese Red Cross Narita Hospital, Japan
| | - Yasunobu Endo
- Department of Laboratory Medicine, Japanese Red Cross Narita Hospital, Japan
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45
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Nakashima K, Aoshima M, Ohfuji S, Yamawaki S, Nemoto M, Hasegawa S, Noma S, Misawa M, Hosokawa N, Yaegashi M, Otsuka Y. Immunogenicity of simultaneous versus sequential administration of a 23-valent pneumococcal polysaccharide vaccine and a quadrivalent influenza vaccine in older individuals: A randomized, open-label, non-inferiority trial. Hum Vaccin Immunother 2018; 14:1923-1930. [PMID: 29561248 PMCID: PMC6150043 DOI: 10.1080/21645515.2018.1455476] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
It is unclear whether simultaneous administration of a 23-valent pneumococcal polysaccharide vaccine (PPSV23) and a quadrivalent influenza vaccine (QIV) produces immunogenicity in older individuals. This study tested the hypothesis that the pneumococcal antibody response elicited by simultaneous administration of PPSV23 and QIV in older individuals is not inferior to that elicited by sequential administration of PPSV23 and QIV. We performed a single-center, randomized, open-label, non-inferiority trial comprising 162 adults aged ≥65 years randomly assigned to either the simultaneous (simultaneous injections of PPSV23 and QIV) or sequential (control; PPSV23 injected 2 weeks after QIV vaccination) groups. Pneumococcal immunoglobulin G (IgG) titers of serotypes 23F, 3, 4, 6B, 14, and 19A were assessed. The primary endpoint was the serotype 23F response rate (a ≥2-fold increase in IgG concentrations 4–6 weeks after PPSV23 vaccination). With the non-inferiority margin set at 20% fewer patients, the response rate of serotype 23F in the simultaneous group (77.8%) was not inferior to that of the sequential group (77.6%; difference, 0.1%; 90% confidence interval, −10.8% to 11.1%). None of the pneumococcal IgG serotype titers were significantly different between the groups 4–6 weeks after vaccination. Simultaneous administration did not show a significant decrease in seroprotection odds ratios for H1N1, H3N2, or B/Phuket influenza strains other than B/Texas. Additionally, simultaneous administration did not increase adverse reactions. Hence, simultaneous administration of PPSV23 and QIV shows an acceptable immunogenicity that is comparable to sequential administration without an increase in adverse reactions. (This study was registered with ClinicalTrials.gov [NCT02592486]).
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Affiliation(s)
- Kei Nakashima
- a Department of Pulmonology , Kameda Medical Center , Chiba , Japan
| | - Masahiro Aoshima
- a Department of Pulmonology , Kameda Medical Center , Chiba , Japan
| | - Satoko Ohfuji
- b Department of Public Health , Osaka City University Graduate School of Medicine , Osaka , Japan
| | - Satoshi Yamawaki
- a Department of Pulmonology , Kameda Medical Center , Chiba , Japan
| | - Masahiro Nemoto
- a Department of Pulmonology , Kameda Medical Center , Chiba , Japan
| | - Shinya Hasegawa
- c Department of General Internal Medicine , Kameda Medical Center , Chiba , Japan
| | - Satoshi Noma
- a Department of Pulmonology , Kameda Medical Center , Chiba , Japan
| | - Masafumi Misawa
- a Department of Pulmonology , Kameda Medical Center , Chiba , Japan
| | - Naoto Hosokawa
- d Department of Infectious Disease , Kameda Medical Center , Chiba , Japan
| | - Makito Yaegashi
- c Department of General Internal Medicine , Kameda Medical Center , Chiba , Japan
| | - Yoshihito Otsuka
- e Department of Laboratory Medicine , Kameda Medical Center , Chiba , Japan
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Affiliation(s)
- A Onishi
- Department of Rheumatology and Clinical Immunology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Y Otsuka
- Division of Neurology, Kobe University Graduate School of Medicine, Kobe, Japan
| | - N Morita
- Department of Otolaryngology-Head and Neck Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - A Morinobu
- Department of Rheumatology and Clinical Immunology, Kobe University Graduate School of Medicine, Kobe, Japan
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Hase R, Miyoshi K, Matsuura Y, Endo Y, Nakamura M, Otsuka Y. Legionella pneumonia appeared during hospitalization in a patient with hematological malignancy confirmed by sputum culture after negative urine antigen test. J Infect Chemother 2018; 24:579-582. [PMID: 29373263 DOI: 10.1016/j.jiac.2017.12.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 11/20/2017] [Accepted: 12/20/2017] [Indexed: 10/18/2022]
Abstract
Legionella pneumophila is recognized as a common causative organism for community-acquired pneumonia, but it is rarely a causative organism for hospital-acquired pneumonia, except in cases of hospital outbreak. Recently, most of the Legionella cases have been diagnosed using the urine antigen test. However, this test can reliably detect only L. pneumophila serogroup 1. Here we report a 63-year-old male patient who was recently diagnosed with acute leukemia and treated with chemotherapy and who developed pneumonia on hospital day 8 during the nadir phase. He was later diagnosed with Legionella pneumonia by culture despite a negative urine antigen test. This case suggests that Legionella pneumonia is an important differential diagnosis for pneumonia in inpatients in the early phase of hospitalization and that when Legionella infection is clinically suspected, culture using selective media or molecular tests should be performed even if the urine antigen test is negative.
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Affiliation(s)
- Ryota Hase
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iidacho, Narita, Chiba, Japan.
| | - Kazuyasu Miyoshi
- Department of Infectious Diseases, Japanese Red Cross Narita Hospital, 90-1 Iidacho, Narita, Chiba, Japan
| | - Yasuhiro Matsuura
- Department of Hematology and Oncology, Japanese Red Cross Narita Hospital, 90-1 Iidacho, Narita, Chiba, Japan
| | - Yasunobu Endo
- Department of Laboratory Medicine, Japanese Red Cross Narita Hospital, 90-1 Iidacho, Narita, Chiba, Japan
| | - Masaki Nakamura
- Division of Bacteriology, Chiba Prefectural Institute of Public Health, 666-2 Nitonacho, Chiba Chuo-ku, Chiba, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, 929 Higashicho, Kamogawa, Chiba, Japan
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Hiraoka K, Otsuka Y, Ishikawa T, Kawai K, Harada T. Effect the sperm selection magnification (400x vs 1,200x) on fertilization results and embryo development in human Piezo-ICSI. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nakashima K, Aoshima M, Nakashita T, Hara M, Otsuki A, Noma S, Misawa M, Otsuka Y, Motojima S. Low-dose trimethoprim-sulfamethoxazole treatment for pneumocystis pneumonia in non-human immunodeficiency virus-infected immunocompromised patients: A single-center retrospective observational cohort study. J Microbiol Immunol Infect 2017; 51:810-820. [PMID: 28779879 DOI: 10.1016/j.jmii.2017.07.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 06/15/2017] [Accepted: 07/12/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND/PURPOSE The efficacy of low-dose trimethoprim-sulfamethoxazole (TMP-SMX) may be acceptable for the treatment of pneumocystis pneumonia (PCP) in non-human immunodeficiency virus (HIV)-infected patients, with a low incidence of adverse reactions. This study is aimed to evaluate the efficacy and safety of such a regimen for the treatment of non-HIV PCP. METHODS We retrospectively enrolled 24 consecutive patients diagnosed with non-HIV PCP who were treated with low-dose TMP-SMX (TMP, 4-10 mg/kg/day; SMX, 20-50 mg/kg/day). Data of the conventional-dose treatment were used as reference. The primary endpoints were the 30- and 180-day survival rates from the day of treatment, and secondary endpoints were the incidence of each adverse reaction and dropout rate from the initial TMP-SMX regimen. The survival rate was estimated using the Kaplan-Meier method with 95% confidence interval (CI). RESULTS The median age of patients was 72 years (54.2% men), and connective tissue disease was the most frequent underlying disease (66.7%) in the low-dose group. The 30- and 180-day survival rates were 95.8% (95% CI: 88.2-100.0%) and 91.0% (95% CI: 79.9%-100.0%), respectively, in the low-dose group and 69.0% (95% CI: 54.0%-88.0%) and 51.5% (95% CI: 36.1%-73.4%), respectively, in the conventional-dose group. The total adverse reaction rate was 58.3% in the low-dose group and 72.4% in the conventional-dose group. A total of 75.0% of patients in the low-dose group and 31.0% in the conventional-dose group completed treatment with the initial regimen. CONCLUSION Low-dose TMP-SMX may be a treatment option for patients with non-HIV PCP.
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Affiliation(s)
- Kei Nakashima
- Department of Pulmonary Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan.
| | - Masahiro Aoshima
- Department of Pulmonary Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Tamao Nakashita
- Department of Rheumatology, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Masahiko Hara
- Department of Cardiovascular Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - Ayumu Otsuki
- Department of Pulmonary Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Satoshi Noma
- Department of Pulmonary Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Masafumi Misawa
- Department of Pulmonary Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Yoshihito Otsuka
- Department of Laboratory Medicine, Kameda Medical Center, Kamogawa, Chiba, Japan
| | - Shinji Motojima
- Department of Rheumatology, Kameda Medical Center, Kamogawa, Chiba, Japan
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