研究者詳細 - 大塚　勇輝

論文 - 大塚　勇輝

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Impact of Lifestyle Changes on Body Weight Gain During Nationwide Lockdown Due to COVID-19 Pandemic. 国際誌

Chisa Nishida, Hiroyuki Honda, Yuki Otsuka, Hideharu Hagiya, Yasuhiro Nakano, Kohei Oguni, Kazuki Tokumasu, Yasue Sakurada, Mikako Obika, Fumio Otsuka

Journal of clinical medicine 14 ( 7 ) 2025年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

Background: During the coronavirus disease 2019 (COVID-19) pandemic, people in Japan were urged to stay at home as much as possible, and this resulted in significant changes in lifestyle behavior. The new lifestyle included factors affecting both energy intake and energy consumption, and it is now thought that weight gain during the lockdown was the result of complex effects. The aim of this study was to determine the relationships among lifestyle habits, laboratory data, and body weight gain during the lockdown using medical check-up data. Methods: A total of 3789 individuals who had undergone consecutive medical check-ups during the period from 2018 to 2020 were included in this study. Participants whose body weight had increased by 5% or more were divided into two groups: a before-lockdown group (participants who had gained weight between 2018 and 2019) and an after-lockdown group (participants who had gained weight between 2019 and 2020). Physical measurements, laboratory data, and answers to six questions about lifestyle habits, for which information was obtained from the records from medical check-ups, were compared in the two groups. Results: There was no significant difference between the distribution of weight changes in 2018-2019 before the lockdown and the distribution of weight changes in 2019-2020 after the lockdown. The before-lockdown and after-lockdown groups both included about 7% of the total participants (279 and 273 participants, respectively). Diastolic blood pressure and levels of AST, ALT, and LDL-C were significantly higher in the after-lockdown group than in the before-lockdown group. The percentages of participants with alcohol consumption and exercise habits were significantly higher in the after-lockdown group than in the before-lockdown group, and an analysis by gender showed that the differences were significant for women but not for men. Conclusions: The distributions of weight changes before and during the COVID-19 pandemic were similar. Exercise habits and alcohol consumption might have been unique factors causing weight gain during the COVID-19 pandemic, particularly in women. Our findings suggest that the impact of behavioral restrictions and lifestyle changes during a pandemic may be different in men and women.

DOI： 10.3390/jcm14072242

Involvement of a Novel Variant of FGFR1 Detected in an Adult Patient with Kallmann Syndrome in Regulation of Gonadal Steroidogenesis. 国際誌

Yoshiaki Soejima, Yuki Otsuka, Marina Kawaguchi, Kohei Oguni, Koichiro Yamamoto, Yasuhiro Nakano, Miho Yasuda, Kazuki Tokumasu, Keigo Ueda, Kosei Hasegawa, Nahoko Iwata, Fumio Otsuka

International journal of molecular sciences 26 ( 6 ) 2025年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

Fibroblast growth factor receptor 1 (FGFR1), also known as KAL2, is a tyrosine kinase receptor, and variants of FGFR1 have been detected in patients with Kallmann syndrome (KS), which is a congenital developmental disorder characterized by central hypogonadism and anosmia. Herein, we report an adult case of KS with a novel variant of FGFR1. A middle-aged male was referred for a compression fracture of a lumbar vertebra. It was shown that he had severe osteoporosis, anosmia, gynecomastia, and a past history of operations for cryptorchidism. Endocrine workup using pituitary and gonadal stimulation tests revealed the presence of both primary and central hypogonadism. Genetic testing revealed a novel variant of FGFR1 (c.2197_2199dup, p.Met733dup). To identify the pathogenicity of the novel variant and the clinical significance for the gonads, we investigated the effects of the FGFR1 variant on the downstream signaling of FGFR1 and gonadal steroidogenesis by using human steroidogenic granulosa cells. It was revealed that the transfection of the variant gene significantly impaired FGFR1 signaling, detected through the downregulation of SPRY2, compared with that of the case of the forced expression of wild-type FGFR1, and that the existence of the variant gene apparently altered the expression of key steroidogenic factors, including StAR and aromatase, in the gonad. The results suggested that the novel variant of FGFR1 detected in the patient with KS was linked to the impairment of FGFR1 signaling, as well as the alteration of gonadal steroidogenesis, leading to the pathogenesis of latent primary hypogonadism.

DOI： 10.3390/ijms26062713

Crowned Dens Syndrome Triggered by Dental Treatment. 国際誌

Satoru Morita, Yuki Otsuka, Yohei Masuda, Yoshiaki Soejima, Fumio Otsuka

Clinical case reports 13 ( 2 ) e70168 2025年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

Crowned dens syndrome (CDS) is an important yet often overlooked cause of fever and neck pain, frequently leading to unnecessary examinations and treatments and misdiagnosis as infectious diseases or rheumatic diseases. The mechanism of an acute attack of CDS is not clarified completely, while it is considered that severe systemic stress can trigger inflammation caused by calcium pyrophosphate crystals. We describe a case of CDS triggered by localized physical stress to the neck and emphasize the importance of considering this condition in cases of fever and neck pain following dental treatment.

DOI： 10.1002/ccr3.70168

Interrelationships Between Plasma Levels of Brain Natriuretic Peptide and Prolonged Symptoms Due to Long COVID. 国際誌

Yohei Masuda, Yuki Otsuka, Kazuki Tokumasu, Hiroyuki Honda, Yasue Sakurada, Yui Matsuda, Yasuhiro Nakano, Ryosuke Takase, Daisuke Omura, Toru Hasegawa, Keigo Ueda, Fumio Otsuka

Journal of clinical medicine 14 ( 3 ) 2025年1月

記述言語：英語掲載種別：研究論文（学術雑誌）

Objectives: Evidence for the usefulness of biomarkers that aid in diagnosis, assessment of severity, and prediction of prognosis in patients with long COVID is limited. The aim of this study was to clarify the characteristics of brain natriuretic peptide (BNP) in long COVID. Methods: We conducted a retrospective observational study of patients who visited the COVID-19 aftercare outpatient clinic at Okayama University Hospital from February 2021 to April 2024. Results: A total of 428 patients were enrolled in this study, and the patients were divided into a group with normal BNP (n = 314, ≤18.4 pg/mL) and a group with increased BNP (n = 114, >18.4 pg/mL). The long COVID group with increased BNP had a higher proportion of females (44.3% vs. 73.7%, p < 0.01) and an older median age (38 vs. 51 years, p < 0.01). Fatigue and brain fog were commonly manifested in both groups, while dyspnea was a more frequent complaint in the group with increased BNP. Various symptoms including fatigue, palpitations, and taste and/or olfactory disorders were associated with elevated BNP (23 to 24 pg/mL). Memory impairment was also linked to higher BNP (OR: 2.36, p = 0.05). In long COVID patients, plasma BNP elevation appears to be more pronounced in females and is often related to cardiogenic factors, in which inflammatory responses are also involved. Conclusions: Plasma BNP measurement may be useful for evaluating the severity of long COVID, especially in female patients and those with respiratory symptoms and/or memory impairment.

DOI： 10.3390/jcm14030817

Clinical characteristics of female long COVID patients with menstrual symptoms: a retrospective study from a Japanese outpatient clinic. 査読国際誌

Yasue Sakurada, Yui Matsuda, Kanon Motohashi, Toru Hasegawa, Yuki Otsuka, Yasuhiro Nakano, Kazuki Tokumasu, Koichiro Yamamoto, Naruhiko Sunada, Hiroyuki Honda, Hideharu Hagiya, Keigo Ueda, Fumio Otsuka

Journal of psychosomatic obstetrics and gynaecology 45 ( 1 ) 2305899 - 2305899 2024年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: To elucidate the impact of long COVID on menstruation and mental health, medical records of patients with long COVID were evaluated. METHODS: Symptoms of long COVID, QOL, mental health, and related endocrine data were compared between two groups with and without menstrual disturbances. RESULTS: Of 349 female patients who visited our clinic between February 2021 and March 2023, 223 patients with long COVID (aged 18-50 years) were included. Forty-four (19.7%) of the patients had menstrual symptoms associated with long COVID. The patients with menstrual symptoms were older than those without menstrual symptoms (42.5 vs. 38 years). The percentage of patients with menstrual symptoms was higher during the Omicron phase (24%) than during the Preceding (13%) and Delta (12%) phases. Cycle irregularity was the most frequent (in 63.6% of the patients), followed by severe pain (25%), heavy bleeding (20.5%), perimenopausal symptoms (18.2%), and premenstrual syndrome (15.9%). Fatigue and depression were the most frequent complications. Scores for fatigue and for QOL were significantly worse in long COVID patients with menstrual symptoms. Results of endocrine examinations showed significantly increased cortisol levels in patients with menstrual complaints. CONCLUSION: Long COVID has an impact on menstrual conditions and on QOL related to menstrual conditions.

DOI： 10.1080/0167482X.2024.2305899

Clinical Characteristics of Persistent Hypophosphatasemia Uncovered in Adult Patients: A Retrospective Study at a Japanese Tertiary Hospital. 国際誌

Shintaro Fujiwara, Yuki Otsuka, Masanori Furukawa, Akihito Higashikage, Fumio Otsuka

Journal of clinical medicine 13 ( 23 ) 2024年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

Background: Hypophosphatasemia is often overlooked despite its potential to indicate underlying pathologies. The aim of this study was to determine the prevalence of persistent hypophosphatasemia in a large, urban, multi-specialty hospital population and characterize the clinical and laboratory findings in adult patients with this condition. Methods: In this retrospective observational study, the results of 424,434 alkaline phosphatase (ALP) tests in 50,136 patients aged ≥18 years that were performed at Okayama University Hospital between July 2020 and October 2023 were analyzed. Persistent hypophosphatasemia was defined as consistently low ALP levels (≤40 IU/L) for 28 days with a minimum recorded level of ≤35 IU/L. Results: Persistent hypophosphatasemia was detected in 273 patients (0.54% of the tested patients), and the patients with persistent hypophosphatasemia included a higher proportion of females (72.5% vs. 52.9% in the people without persistent hypophosphatasemia; chi-squared test, p < 0.01) and had a younger median age (51 years vs. 63 years; Mann-Whitney U test, p < 0.01) than those in the overall tested population. The common causes of persistent hypophosphatasemia were cancer (30%), glucocorticoid use (21%), and immunosuppressants (16%). Notably, 38 patients (14%) had no apparent cause for low ALP values. These patients were categorized on the basis of their clinical characteristics, with some patients presenting symptoms potentially related to adult hypophosphatasia. Conclusions: This study provides prevalence and insights into the causes and characteristics of persistent hypophosphatasemia in a Japanese tertiary care setting. While most cases were associated with known causes, patients with unexplained hypophosphatasemia and symptoms such as chronic pain, muscle weakness, and general fatigue could have adult hypophosphatasia. In such cases, comprehensive evaluation and further investigation for hypophosphatasia should be considered. Persistent hypophosphatasemia of undetermined etiology could be a crucial initial step in diagnostic algorithms for this condition.

DOI： 10.3390/jcm13237078

Human Papillomavirus vaccination awareness and uptake among healthcare students in Japan. 国際誌

Madoka Shimbe, Yuki Otsuka, Hideharu Hagiya, Yoichi Yamada, Fumio Otsuka

Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy 31 ( 2 ) 102554 - 102554 2024年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The vaccination rate for HPV (Human Papillomavirus) has remained significantly low in Japan because of the administrative suspension of active recommendation. This study investigates the awareness and uptake of the HPV vaccine among healthcare students in Japan following the reinstatement of active recommendation for young women in April 2022. METHODS: A web-based survey was administered to 2567 healthcare students from Okayama and Shujitsu Universities in Japan in July 2023. The survey assessed participants' backgrounds, immunization status, awareness of vaccine recommendations, and knowledge of cervical cancer across various demographics, including sex, academic year, and department (Medicine, Health Science, Pharmaceutical, and Dentistry). RESULTS: The response rate was 36.3 % (933 students; 181 male, 739 female, and 13 unspecified gender). The overall immunization rate among female students was 55.6 %, with higher rates observed in medical (73.8 %) and dental (63.0 %) students. Awareness of the government's change in vaccine recommendation was notably high among female and senior male students. Over half of the female students (54.7 %) reported receiving vaccinations based on their parents' advice. Among those unvaccinated but interested in future immunization, concerns about adverse reactions (47.4 %) and challenges in scheduling vaccinations (29.1 %) were predominant. CONCLUSION: Healthcare students exhibited a higher HPV vaccination rate than the general population. Ongoing education to improve vaccine literacy is crucial for augmenting HPV vaccination rates in Japan.

DOI： 10.1016/j.jiac.2024.11.004

Threat of MRSA bacteremia still matters: a propensity score matching analysis. 査読国際誌

Shinnosuke Fukushima, Hideharu Hagiya, Naoki Kuninaga, Yuto Haruki, Haruto Yamada, Yoshitaka Iwamoto, Masayo Yoshida, Kota Sato, Yoshihisa Hanayama, Shuichi Tanaka, Tomoko Miyoshi, Yuki Otsuka, Keigo Ueda, Fumio Otsuka

Infection 53 ( 1 ) 489 - 491 2024年9月

Effectiveness of Sensing Gloves-Applied Virtual Reality Education System on Hand Hygiene Practice: A Randomised Controlled Trial. 査読国際誌

Mahiro Izumi, Hideharu Hagiya, Yuki Otsuka, Yoshiaki Soejima, Shinnosuke Fukushima, Mitsunobu Shibata, Satoshi Hirota, Toshihiro Koyama, Fumio Otsuka, Akio Gofuku

American journal of infection control 53 ( 1 ) 65 - 69 2024年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

INTRODUCTION: We developed a virtual reality (VR) education system and evaluated its clinical utility for promoting hand hygiene practices. METHODS: This prospective, two-week, randomised controlled study conducted at Okayama University Hospital, Japan, from November 2023 to January 2024, involved 22 participants (18 medical students and four residents). A fully immersive 360° VR system (VIVE Pro Eye) using a head-mounted display and sensing gloves was used to develop three healthcare tasks in a virtual patient room-Environmental Cleaning, Gauze Exchange, and Urine Collection. After monitoring all participants' baseline usage data of portable hand-rubbing alcohol in the first week, we randomly assigned them into 1:1 groups (VR training and video lecture groups). The primary outcome was differences in hand-rubbed alcohol use before and after intervention. RESULTS: Before the intervention, alcohol use did not significantly differ between both groups. After the intervention, a significant increase in alcohol use was observed in the VR training group (median: 8.2 g vs. 16.2 g; p=0.019) but not in the video lecture group. CONCLUSION: Our immersive 360° VR education system enhanced hand hygiene practices. Infection prevention and control practitioners and digital technology experts must collaborate to advance the development of superior educational devices and content.

DOI： 10.1016/j.ajic.2024.08.003

Precision Trigger Point Injections: An Anatomically Guided Approach for Anterior Cutaneous Nerve Entrapment Syndrome Treatment. 査読

Takashi Watari, Yuki Otsuka, Yoshihiko Shiraishi

Internal medicine (Tokyo, Japan) 64 ( 5 ) 805 - 805 2024年8月

Clinical and endocrine features of orthostatic intolerance detected in patients with long COVID. 査読国際誌

Atsushi Kato, Kazuki Tokumasu, Koichiro Yamamoto, Yuki Otsuka, Yasuhiro Nakano, Hiroyuki Honda, Naruhiko Sunada, Yasue Sakurada, Yui Matsuda, Toru Hasegawa, Ryosuke Takase, Keigo Ueda, Fumio Otsuka

Scientific reports 14 ( 1 ) 17025 - 17025 2024年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

Orthostatic intolerance (OI) is a key symptom of long COVID; however, the pathophysiology remains unknown. Among 688 long COVID patients who visited our clinic during the period from February 2021 to April 2023, 86 patients who were suspected of having OI and who underwent an active standing test (ST) were investigated to elucidate the clinical characteristics of OI in patients with long COVID. Of the 86 patients, 33 patients (38%) were ST-positive. Nausea and tachycardia in daily life were frequent complaints in the ST-positive group. The increase in heart rate (HR) during the ST was significantly greater during a 10-min period after standing in the ST-positive group (+ 30 bpm) than in the ST-negative group (+ 16 bpm). The initial increase in diastolic blood pressure (DBP) just after standing was significantly greater in the ST-positive group (+ 14 mmHg) than in the ST-negative group (+ 9 mmHg). Serum cortisol levels in the ST-positive patients aged over 20 years were higher and growth hormone levels in the patients under 20 years of age were lower than those in the ST-negative group. Autonomous nervous symptoms, transient DBP rise with increasing HR after standing, and endocrine dysfunctions are helpful for detecting OI related to long COVID.

DOI： 10.1038/s41598-024-67815-y

Importance of Blood Glucose Measurement for Predicting the Prognosis of Long COVID: A Retrospective Study in Japan. 査読国際誌

Sho Yokoyama, Hiroyuki Honda, Yuki Otsuka, Kazuki Tokumasu, Yasuhiro Nakano, Yasue Sakurada, Yui Matsuda, Naruhiko Sunada, Toru Hasegawa, Ryosuke Takase, Daisuke Omura, Yoshiaki Soejima, Keigo Ueda, Masayuki Kishida, Fumio Otsuka

Journal of clinical medicine 13 ( 14 ) 2024年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

Purpose: The present study aimed to clarify the effects of a hyperglycemic condition on the clinical consequences of long COVID. Methods: Among 643 patients who visited the outpatient clinic of our hospital from February 2021 to September 2023, long COVID patients were classified into a hyperglycemic (HG) group with casual blood glucose levels above 140 mg/dL and a normoglycemic (NG) group. The patients' backgrounds, clinical symptoms, health status including the QOL evaluation scale (EQ-5D-5L), self-rating depression scale (SDS), and F-scale questionnaire (FSSG), blood test data, and recovery periods were analyzed. Results: The NG group included 607 patients with long COVID and the HG group included 36 patients with long COVID. Patients in the HG group were older than those in the NG group (55 vs. 41 years; p < 0.001) and included a larger percentage of males (67% vs. 44%; p = 0.009). The HG group had a larger percentage of patients with moderate-to-severe conditions in the acute infection phase (28% vs. 12%; p = 0.008), a higher BMI (25 vs. 22 kg/m2; p < 0.001), higher blood pressure (138/81 vs. 122/72 mmHg; p < 0.001), and a larger percentage of patients with an alcohol drinking habit (53% vs. 34%; p = 0.031). Long COVID symptoms and self-rated scales were not differed between the two groups; however, the laboratory data showed that liver and renal functions and metabolic data were significantly worse in the HG group. Although there was no apparent difference between the two groups in duration from the infection to the first visit, the HG group had a significantly longer period of recovery from long COVID (median period of 421 vs. 294 days; p = 0.019). Conclusion: A hyperglycemic state associated with other lifestyle-related diseases is associated with the prolongation of recovery from long COVID.

DOI： 10.3390/jcm13144099

Changes in Working Situations of Employed Long COVID Patients: Retrospective Study in Japanese Outpatient Clinic. 査読国際誌

Yui Matsuda, Yasue Sakurada, Yuki Otsuka, Kazuki Tokumasu, Yasuhiro Nakano, Naruhiko Sunada, Hiroyuki Honda, Toru Hasegawa, Ryosuke Takase, Daisuke Omura, Keigo Ueda, Fumio Otsuka

Journal of clinical medicine 13 ( 13 ) 2024年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Purpose: The present study aimed to uncover the impact of long COVID on the working situations of Japanese patients. Methods: Changes in the working situations of the patients who visited our long COVID clinic were evaluated from medical records for the aspects of physical status, quality of life (QOL), and mental conditions. Results: Of 846 long COVID patients who visited our clinic from February 2021 to December 2023, 545 employed patients aged between 18 and 65 years were included in this study. A total of 295 patients (54.1%) with long COVID (median age: 43 years, female: 55.6%) experienced changes in their working status. Those patients included 220 patients (40.4%) who took a leave of absence, 53 patients (9.7%) who retired, and 22 patients (4%) with reduced working hours. Most of the patients (93.2%) with changes in working conditions had mild disease severity in the acute phase of COVID-19. The majority of those patients with mild disease severity (58.8%) were infected in the Omicron-variant phase and included 65.3% of the female patients. The major symptoms in long COVID patients who had changes in their working situations were fatigue, insomnia, headache, and dyspnea. Scores indicating fatigue and QOL were worsened in long COVID patients who had changes in their working situations. In addition, 63.7% of the long COVID patients with changes in their working situations had decreases in their incomes. Conclusions: Changes in the working situation of long COVID patients who were employed had a negative impact on the maintenance of their QOL.

DOI： 10.3390/jcm13133809

Evaluation of ChatGPT-Generated Differential Diagnosis for Common Diseases With Atypical Presentation: Descriptive Research. 査読国際誌

Kiyoshi Shikino, Taro Shimizu, Yuki Otsuka, Masaki Tago, Hiromizu Takahashi, Takashi Watari, Yosuke Sasaki, Gemmei Iizuka, Hiroki Tamura, Koichi Nakashima, Kotaro Kunitomo, Morika Suzuki, Sayaka Aoyama, Shintaro Kosaka, Teiko Kawahigashi, Tomohiro Matsumoto, Fumina Orihara, Toru Morikawa, Toshinori Nishizawa, Yoji Hoshina, Yu Yamamoto, Yuichiro Matsuo, Yuto Unoki, Hirofumi Kimura, Midori Tokushima, Satoshi Watanuki, Takuma Saito, Fumio Otsuka, Yasuharu Tokuda

JMIR medical education 10 e58758 2024年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: The persistence of diagnostic errors, despite advances in medical knowledge and diagnostics, highlights the importance of understanding atypical disease presentations and their contribution to mortality and morbidity. Artificial intelligence (AI), particularly generative pre-trained transformers like GPT-4, holds promise for improving diagnostic accuracy, but requires further exploration in handling atypical presentations. OBJECTIVE: This study aimed to assess the diagnostic accuracy of ChatGPT in generating differential diagnoses for atypical presentations of common diseases, with a focus on the model's reliance on patient history during the diagnostic process. METHODS: We used 25 clinical vignettes from the Journal of Generalist Medicine characterizing atypical manifestations of common diseases. Two general medicine physicians categorized the cases based on atypicality. ChatGPT was then used to generate differential diagnoses based on the clinical information provided. The concordance between AI-generated and final diagnoses was measured, with a focus on the top-ranked disease (top 1) and the top 5 differential diagnoses (top 5). RESULTS: ChatGPT's diagnostic accuracy decreased with an increase in atypical presentation. For category 1 (C1) cases, the concordance rates were 17% (n=1) for the top 1 and 67% (n=4) for the top 5. Categories 3 (C3) and 4 (C4) showed a 0% concordance for top 1 and markedly lower rates for the top 5, indicating difficulties in handling highly atypical cases. The χ2 test revealed no significant difference in the top 1 differential diagnosis accuracy between less atypical (C1+C2) and more atypical (C3+C4) groups (χ²1=2.07; n=25; P=.13). However, a significant difference was found in the top 5 analyses, with less atypical cases showing higher accuracy (χ²1=4.01; n=25; P=.048). CONCLUSIONS: ChatGPT-4 demonstrates potential as an auxiliary tool for diagnosing typical and mildly atypical presentations of common diseases. However, its performance declines with greater atypicality. The study findings underscore the need for AI systems to encompass a broader range of linguistic capabilities, cultural understanding, and diverse clinical scenarios to improve diagnostic utility in real-world settings.

DOI： 10.2196/58758

Disseminated septic arthritis caused by Ureaplasma urealyticum in an immunocompromised patient with hypogammaglobulinemia after rituximab therapy. 査読国際誌

Kohei Oguni, Shinnosuke Fukushima, Yuki Otsuka, Yoshiaki Soejima, Marina Kawaguchi, Yosuke Sazumi, Takumi Fujimori, Koji Iio, Noriyuki Umakoshi, Kazuki Yamada, Hideharu Hagiya, Fumio Otsuka

Infection 52 ( 6 ) 2495 - 2499 2024年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

PURPOSE: Ureaplasma urealyticum is a rare pathogen associated with septic arthritis that predominantly affects patients with hypogammaglobulinemia. Bacterial identification of fastidious organisms is challenging because they are undetectable by routine culture testing. To the best of our knowledge, this is the first report of septic arthritis induced by U. urealyticum infection in Japan. CASE DESCRIPTION: We describe the case of a 23-year-old Japanese female with secondary hypogammaglobulinemia (serum immunoglobulin level < 500 mg/dL), identified 8 years after treatment with rituximab. The patient presented with persistent fever and polyarthritis that were unresponsive to ceftriaxone and prednisolone. Contrast-enhanced computed tomography and gallium-67 scintigraphy revealed effusion and inflammation in the left sternoclavicular, hip, wrist, knee, and ankle joints. Although Gram staining and bacterial culture of the drainage fluid from the left hip joint were negative, the condition exhibited characteristics of purulent bacterial infection. The patient underwent empirical treatment with doxycycline, and her symptoms promptly resolved. Subsequent 16S ribosomal RNA (rRNA) gene sequencing of the joint fluid confirmed the presence of U. urealyticum, leading to the diagnosis of septic arthritis. Combination therapy with doxycycline and azithromycin yielded a favorable recovery from the inflammatory status and severe arthritic pain. CONCLUSION: This case highlights U. urealyticum as a potential causative agent of disseminated septic arthritis, particularly in patients with hypogammaglobulinaemia. The 16S rRNA gene analysis proved beneficial for identifying pathogens in culture-negative specimens, such as synovial fluid, in suspected bacterial infections.

DOI： 10.1007/s15010-024-02301-1

A trial of structured debate as a self‐learning method for students and young healthcare providers to discuss social issues in general and family medicine: A case report in Japan 査読

Tatsuki Ikejiri, Jeonse Lee, Natsuki Yokoyama, Arisa Hakariya, Yuki Otsuka, Hayase Hakariya

Journal of General and Family Medicine 25 ( 5 ) 293 - 294 2024年5月

Adherence to and clinical utility of "quality indicators" for Staphylococcus aureus bacteremia: a retrospective, multicenter study. 査読国際誌

Shinnosuke Fukushima, Hideharu Hagiya, Naoki Kuninaga, Yuto Haruki, Haruto Yamada, Yoshitaka Iwamoto, Masayo Yoshida, Kota Sato, Yoshihisa Hanayama, Shuichi Tanaka, Tomoko Miyoshi, Yuki Otsuka, Keigo Ueda, Fumio Otsuka

Infection 52 ( 4 ) 1527 - 1538 2024年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

BACKGROUND: We aimed to improve the prognosis, treatment, and management of Staphylococcus aureus bacteremia (SAB) by evaluating the association between adherence to quality indicators (QIs) and clinical outcomes in patients with their clinical outcomes. METHODS: We retrospectively collected clinical and microbiological data on hospitalized patients with SAB from 14 hospitals (three with > 600, two with 401-600, five with 201-400, and four with ≤ 200 beds) in Japan from January to December 2022. The SAB management quality was evaluated using the SAB-QI score (ranging from 0 to 13 points), which consists of 13 QIs (grouped into five categories) based on previous literature. RESULTS: Of the 4,448 positive blood culture episodes, 289 patients with SAB (6.5%) were enrolled. The SAB-QI scores ranged from 3 to 13, with a median score of 9 points. The SAB-QI score was highest in middle-sized hospitals with 401-600 beds. Adherence to each of the four QI categories (blood culture, echocardiography, source control, and antibiotic treatment) was significantly higher in survived cases than in fatal cases. Kaplan-Meier curves with log-rank tests demonstrated that higher adherence to SAB-QIs indicated a better prognosis. Logistic regression analysis revealed that age, methicillin resistance, multiple comorbidities (≥ 2), and low SAB-QI score were significantly associated with 30-day mortality in patients with SAB. CONCLUSIONS: Our study highlights that greater adherence to the SAB-QIs correlates with improved patient outcomes. Management of patients with SAB should follow these recommended indicators to maintain the quality of care, especially for patients with poor prognosticators.

DOI： 10.1007/s15010-024-02284-z

新型コロナウイルス感染症罹患後症状における睡眠障害の特徴と推移

大塚文男, 砂田匠彦, 大塚勇輝, 徳増一樹, 本多寛之, 古川雅規

日本病院総合診療医学会雑誌 20 ( 3 ) 129 - 134 2024年5月

記述言語：日本語出版者・発行元：(一社)日本病院総合診療医学会

新型コロナウイルス感染症(COVID-19)罹患後症状(コロナ後遺症)の病態や機序は未解明な点も多い。本研究では,オミクロン変異株の流行以降,睡眠障害を有する患者が増加傾向にあり,その臨床的特徴を明らかにすることを目的とした。2021年2月から2023年6月までに当院受診したコロナ後遺症患者718名のうち,睡眠障害は148人(20.6%)に認められ,株別の有病率をみると従来株:12%,デルタ株:13%,オミクロン株:25%とオミクロン株で有意に増加していた(P<0.01)。睡眠障害のタイプでは総じて入眠障害が多いものの,オミクロン株感染の後遺症に限ると,中途覚醒を伴う患者の増加とともにブレインフォグを呈する割合が高頻度であった(54%,P<0.01)。また,内分泌学的には熟眠障害を有する患者で血清Cortisol値が有意に低下していた(P<0.05)。以上より,コロナ後遺症に見られる睡眠障害の推移には,ストレス応答障害も少なくとも一部関与している可能性が示唆された。(著者抄録)

その他リンク： https://search.jamas.or.jp/default/link?pub_year=2024&ichushi_jid=J05937&link_issn=&doc_id=20240809410001&doc_link_id=10.60227%2Fjhgmwabun.20.3_129&url=https%3A%2F%2Fdoi.org%2F10.60227%2Fjhgmwabun.20.3_129&type=J-STAGE&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00007_3.gif

Prostate abscess caused by ESBL-producing E. coli successfully treated with fosfomycin monotherapy. 査読国際誌

Shinnosuke Fukushima, Yuki Otsuka, Hideharu Hagiya, Naoto Nishikawa, Fumio Otsuka

International journal of antimicrobial agents 63 ( 6 ) 107182 - 107182 2024年4月

Prevalence of hazardous drinking and suspected alcohol dependence in Japanese primary care settings. 査読国際誌

Ryuhei So, Kazuya Kariyama, Shunsuke Oyamada, Sachio Matsushita, Hiroki Nishimura, Yukio Tezuka, Takashi Sunami, Toshi A Furukawa, Mitsuhiko Kawaguchi, Haruhiko Kobashi, Sohji Nishina, Yuki Otsuka, Yasushi Tsujimoto, Yoshinori Horie, Hitoshi Yoshiji, Takefumi Yuzuriha, Kazuhiro Nouso

General hospital psychiatry 89 8 - 15 2024年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

OBJECTIVE: We aimed to assess the prevalence of hazardous drinking and potential alcohol dependence among Japanese primary care patients, and their readiness to change and awareness of others' concerns. METHODS: From July to August 2023, we conducted a multi-site cross-sectional study as a screening survey for participants in a cluster randomized controlled trial. The trial included outpatients aged 20-74 from primary care clinics. Using the Alcohol Use Disorders Identification Test (AUDIT) alongside a self-administered questionnaire, we evaluated the prevalence of hazardous drinking and suspected alcohol dependence, patients' readiness to change, and their awareness of others' concerns. RESULTS: Among the 1388 participants from 18 clinics, 22% (95% confidence interval (CI): 20% to 24%) were identified as engaging in hazardous drinking or suspected of being alcohol dependent. As the AUDIT scores increased, so did their readiness to change. However, only 22% (95%CI: 16% to 28%) of those with scores ranging from 8 to 14 reported that others, including physicians, had expressed concerns about their drinking during the past year. For those with scores of 15 or higher, the figure was 74%. CONCLUSIONS: This study underscores the need for universal or high-risk alcohol screening and brief intervention in Japanese primary care settings. Trial registry UMIN-CTR (https://www.umin.ac.jp/ctr/) (UMIN000051388).

DOI： 10.1016/j.genhosppsych.2024.04.002

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