Papers - MORIOKA Hiroshi

Healthcare-associated infections in Japanese hospitals: results from a large-scale multicentre point-prevalence survey in Aichi, 2020 Invited Reviewed

Hiroshi Morioka, Yusuke Koizumi, Keisuke Oka, Masami Okudaira, Yuka Tomita, Yumi Kojima, Toshitaka Watariguchi, Koichi Watamoto, Yoshikazu Mutoh, Takeshi Tsuji, Manabu Yokota, Junichi Shimizu, Chihiro Hasegawa, Susumu Iwata, Masatoshi Nagaoka, Yuji Ito, Shohei Kawasaki, Hiroki Kato, Yuichi Kitagawa, Takuya Goto, Yasuhiro Nozaki, Kenji Akita, Shinsuke Shimizu, Masanori Nozawa, Munehiro Kato, Masamitsu Ishihara, Kenta Ito, Tetsuya Yagi

Infection Control and Hospital Epidemiology     2024

　More details

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

Antimicrobial use in Japanese hospitals: results from a point-prevalence survey in Aichi, 2020 Reviewed Open Access

H Morioka, Y Koizumi, K Oka, M Okudaira, Y Tomita, Y Kojima, T Watariguchi, K Watamoto, Y Mutoh, T Tsuji, M Yokota, J Shimizu, C Hasegawa, S Iwata, M Nagaoka, Y Ito, S Kawasaki, H Kato, Y Kitagawa, H Hamada, Y Nozaki, K Akita, S Shimizu, M Nozawa, M Kato, M Ishihara, K Ito, T Yagi

Journal of Hospital Infection   Vol. 161   page： 140 - 147   2025.7

　More details

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jhin.2025.04.015

Open Access

Appropriateness of surgical antimicrobial prophylaxis in Japanese university hospitals. Reviewed International journal

Hiroshi Morioka, Hiroki Ohge, Miki Nagao, Hideaki Kato, Ryohei Kokado, Koichi Yamada, Takahiro Yamada, Nobuyuki Shimono, Yoko Nukui, Shingo Yoshihara, Ippei Sakamaki, Kisato Nosaka, Yuko Kubo, Hideki Kawamura, Yuji Fujikura, Tsuyoshi Kitaura, Mitsuhiro Sunakawa, Tetsuya Yagi

The Journal of hospital infection     2022.7

　More details

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

OBJECTIVE: This study aimed to determine the adherence to the Japanese surgical antimicrobial prophylaxis (SAP) guidelines in Japanese university hospitals. DESIGN: A retrospective cohort study. SETTING: Fifteen general and one dental university hospitals. METHODS: We evaluated up to three cases of 18 designated surgeries regarding adherence to Japanese SAP guidelines: selection of antibiotics, timing of administration, re-dosing intervals, and duration of SAP. When all items were appropriate, surgery was defined as 'appropriate.' RESULTS: In total, 688 cases (22-45 cases per surgery) were included. The overall appropriateness was 46.8% (322/688), and the appropriateness of each surgery ranged from 8.0% (2/25, cardiac implantable electronic device implantation) to 92.1% (35/38, distal gastrectomy). The appropriateness of each item was as follows: pre/intraoperative selections, 78.5% (540/688); timing of administrations, 96.0% (630/656); re-dosing intervals, 91.8% (601/656); postoperative selection, 78.9% (543/688); and duration of SAP, 61.4% (423/688). The overall appropriateness of hospitals ranged from 17.6% (9/51) to 73.3% (33/45). The common reasons for inappropriateness were the longer duration (38.5%, 265/688) and choice of antibiotics with a non-optimal antimicrobial spectrum before/during, and after surgery (19.0%, 131/688 and 16.8%, 116/688, respectively), compared to the guideline. CONCLUSIONS: Adherence to the guidelines differed greatly between the surgeries and hospitals. Large-scale multicentre surveillance of SAP in Japanese hospitals is necessary to identify inappropriate surgeries, factors related to the appropriateness, and incidences of surgical site infections.

DOI： 10.1016/j.jhin.2022.06.017

Scopus

PubMed

産婦人科における梅毒診療 2025 Invited

森岡　悠

東海産婦人科学会誌   Vol. 62   page： 17 - 26   2026.3

　More details

Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Delayed Cutibacterium acnes Infection of a Thoracic Aortic Graft Presenting as Empyema: A Case Report and Literature Review Reviewed

Jun Taguchi, Hiroshi Morioka, Yoshiyuki Tokuda, Tomonari Uemura, Hiroshi Hamada, Ken-Ichi Iwata, Kohei Kanda, Oka Keisuke, Tetsuya Yagi

Journal of Infection and Chemotherapy     2026.2

　More details

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jiac.2026.102922

Other Link： https://pdf.sciencedirectassets.com/305943/1-s2.0-S1341321X25X00167/1-s2.0-S1341321X26000206/main.pdf?X-Amz-Security-Token=IQoJb3JpZ2luX2VjELn%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJGMEQCID1TcraE%2BsiNYaaYvighKAJTOxViiHnW2WLPPNSzeHSjAiA6daCQyVvdh2UdRvbom4QdYTsPm33oJA2SRhyf%2BH56oSq8BQiB%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F8BEAUaDDA1OTAwMzU0Njg2NSIMXvVH7cg%2FnJPCPQbMKpAF3THJUJWKwVwBJbXp8itW5wnSwVW9AvPICZv5BIyuON720C%2F9JG00QBLOI3Axu6GFrB3E5Pk2jRprGEWHlqEShZpscjdIQkvn2ajCaKTeQhCGgNPlPAFvAaiGPsLLBGGJtEMWHy50ypqQEu0mjyzpcxT8jMPhEPGPWdwwWTwCE88YTJI5HTzhWgOH0Bw8WIsCkVEtPDPvhz5iJ%2FQtB8zEdhc2nAvMSgZypxCar3RoalfAd6UyUQXS4vXOOwYlql11BHi8wxrUBKoL1uCiMiGf8shaCoPjJREgZ9yS824hua526ziSAKziASud6OS62ZZRX8lA4gp2OUw6%2BcPDKXr1SIwQuEBUvjWhONaoG69t5X%2BzUfoSU9P%2BQjfCRMXxNJALWh7l4lgUm6j6p7kRJ1Jre21j9b1N93vw9lhGnGVTNEfoqUcAaaosiek%2BWo4TCdlTR53V62IBz%2FjBbfexsvvrbad98F4ZwtpCkxIKC1go822nYtX88RTUbN%2Fc%2Fcsosa1m3eLM%2BsxK30LyNqUjE47m6OmPHMd5RxzAT%2BARUPron3FdRby7m74KscuB1fsp51LxnD5rcJMoiFbarUZcwnYg%2FSftiTH4JlXYlRrgxXZz8VgDFaCn9cbnfjktZuTHWdIsGllCMOva4cgHbJzNvynp6CTeTqqkrpu3B5LW7Tdg9RZPzovmsr5EYQJeuIsY2NYSSR50oR9QvtOhzDBci2%2BZP2toNSNNm4EV%2Faxrlb1QnJ%2FIv7QRMuPBK8ciFgFKPtUEbQCcDDJJINsq%2BaEV0iaac76ulhKUDJgJA5EMu5Hb98sd%2Fbp%2BWDPAbhZ8V5oisuITHtKWbzyEivCDgGOdQJivGXWDCvZgK60m0Pv9MYTmYgMw3c%2BkzAY6sgEfGBz%2FX1xn7gF44ddvS33cpjmr9pGHW4QrXx9Z5AvqaUZq8DzRhgGpDLjCugf6oLTlOHulm%2B1Xg9ctfNYCGffonEUndMY42NNAgjam5QvNBF8%2Bv2NlDX72Paa7m3lGc3eSzqw6K1ScKsF6vassME1n0sENM0rtYtyabvYuTChEWG2Jl4ljIJGAMmeuLxKU%2Fny%2FUDgI%2F19QfIrhEaX87kEhM%2FgISVWnX0ARqL5zz75s%2FJCf&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20260209T003000Z&X-Amz-SignedHeaders=host&X-Amz-Expires=300&X-Amz-Credential=ASIAQ3PHCVTYUD2M33EE%2F20260209%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Signature=9d3b53e6bcb641660b3afcd34eb07dfcc26854235774f128e8257bff2dfbda81&hash=c670dc413e2a1de07aa70f898b05f79a71f1f4a0e2e8f0971eb3ed836566542d&host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&pii=S1341321X26000206&tid=spdf-b2e16a5e-0fba-4aed-9615-8e1b9c53cdda&sid=07c26ae4943637444c1aa6c7a194bfac1329gxrqa&type=client&tsoh=d3d3LnNjaWVuY2VkaXJlY3QuY29t&rh=d3d3LnNjaWVuY2VkaXJlY3QuY29t&ua=0e1757050305555f54&rr=9caf41713978d3c9&cc=jp

A Rare Case of Lateral Cervical Cyst Infection Associated with Bacillus subtilis subsp. natto Reviewed Open Access

Nanako Nobuhiro, Hiroshi Morioka, Keisuke Oka, Yuto Fukuda, Makoto Kawachi, Shogo Miyazawa, Masaki Iimura, Shinya Ozaki

Next Research   Vol. 7   2026.2

　More details

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.nexres.2026.101495

Open Access

Enhanced Guideline-Compliant Antimicrobial Prophylaxis Based on Preoperative Urine Culture Pathogens Reduces Bloodstream Infection and Sepsis Following Ureteroscopic Lithotripsy Reviewed

Katsuhiro Onishi , Hiroshi Morioka, Masashi Yamamoto, Daisuke Tsuchimoto, Mitsuru Nishio, Yoshie Moriya, Toru Kimura

Journal of Infection and Chemotherapy     2026.2

　More details

Authorship：Corresponding author   Language：English  

DOI： 10.1016/j.jiac.2026.102924

Longitudinal antibody titers measured after COVID-19 mRNA vaccination can identify individuals at risk for subsequent infection Invited Reviewed International coauthorship Open Access

Hyeongki Park, Naotoshi Nakamura, ,,,Hiroshi Morioka, et al.

Science Translational Medicine   Vol. 17 ( 816 )   2025.9

　More details

Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1126/scitranslmed.adv4214

Open Access

Antimicrobial use in pediatric patients: a subgroup analysis of the 2020 point prevalence survey in Aichi, Japan Reviewed Open Access

Hiroshi Morioka, Kenta Ito, Yusuke Koizumi, Masami Okudaira, Yuka Tomita, Takeshi Tsuji, Kenji Akita, Toshitaka Watariguchi, Keisuke Oka, Koichi Watamoto, Hiroki Kato, Masamitsu Ishihara, Manabu Yokota, Yuji Ito, Yoshikazu Mutoh, Masatoshi Nagaoka, Susumu Iwata, Yasuhiro Nozaki, Hiroshi Hamada, Yumi Kojima, Shohei Kawasaki, Chihiro Hasegawa, Junichi Shimizu, Tetsuya Yagi

Journal of Infection and Chemotherapy     2025.9

　More details

Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jiac.2025.102804

Open Access

WHO Hand Hygiene Self-Assessment Framework を用いた手指衛生推進活動 Invited Reviewed

豊留 有香 , 森岡 悠 , 鈴木 由美 , 八木 哲也

日本環境感染学会誌   Vol. 40 ( 5 ) page： 216 - 225   2025.9

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)  

Prolonged Bacillus cereus bacteremia: case report and literature review Reviewed Open Access

Yuki Hirao, Hiroshi Morioka, Tomomasa Agata, Masaki Iimura, Shunichi Taki, Tetsuya Yagi

Journal of Infection and Chemotherapy   Vol. 31 ( 7 )   2025.7

　More details

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jiac.2025.102736

Open Access

Re-evaluation of blood culture contamination rates: Discordance between clinical and laboratory assessment Invited Reviewed

Hiroshi Hamada, Hiroshi Morioka, Masaki Okazaki, Atsushi Hashizume, Kohei Kanda, Keisuke Oka, Mitsutaka Iguchi, Tetsuya Yagi

Journal of Infection and Chemotherapy   Vol. 31 ( 4 )   2025.1

　More details

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jiac.2025.102628

Reducing infectious complications and healthcare costs in transrectal ultrasound-guided prostate biopsy with single-dose cefmetazole and levofloxacin Invited Reviewed

Katsuhiro Onishi, Hiroshi Morioka, Kazuki Nishida, Masashi Yamamoto, Daisuke Tsuchimoto, Yoshie Moriya, Osamu Kamihira

Urologic Oncology: Seminars and Original Investigations     2025

　More details

Authorship：Corresponding author   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.urolonc.2025.01.017

WHO Hand Hygiene Self-Assessment Frameworkを用いた手指衛生推進活動 Invited Reviewed

日本環境感染学会誌   Vol. 40 ( 5 )   2025

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)  

Flavonifractor plautii bacteremia following bacterial translocation from the gut: A case report and literature review Invited Reviewed Open Access

Yukari Osada, Keisuke Oka, Mitsutaka Iguchi, Hiroshi Morioka, Ken-Ichi Iwata, Moeko Ohara, Nami Shimaoka, Tsunaki Sawada, Tetsuya Yagi

Journal of Infection and Chemotherapy   Vol. 31 ( 3 )   2024.12

　More details

Language：English  

DOI： 10.1016/j.jiac.2024.12.021

Open Access

Risk factors for cefmetazole-non-susceptible bacteremia in acute cholangitis Reviewed Open Access

Katsuhiro Onishi, Hiroshi Morioka, Takahiro Imaizumi, Daisuke Tsuchimoto, Mitsuru Nishio, Takuma Komiyama

Journal of Infection and Chemotherapy     2024.2

　More details

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jiac.2023.11.015

Open Access

Surgical antimicrobial prophylaxis in Japanese hospitals: Real status and challenges Reviewed

Hiroshi Morioka, Yusuke Koizumi, Toshitaka Watariguchi, Keisuke Oka, Yuka Tomita, Yumi Kojima, Masami Okudaira, Yuji Ito, Junichi Shimizu, Koichi Watamoto, Hiroki Kato, Masatoshi Nagaoka, Manabu Yokota, Chihiro Hasegawa, Takeshi Tsuji, Shinsuke Shimizu, Kenta Ito, Shohei Kawasaki, Kenji Akita, Yuichi Kitagawa, Yoshikazu Mutoh, Masamitsu Ishihara, Susumu Iwata, Yasuhiro Nozaki, Masanori Nozawa, Munehiro Kato, Masao Katayama, Tetsuya Yagi ; Research Group of Aichi Point Prevalence Survey

Journal of Infection and Chemotherapy     2024.1

　More details

Authorship：Lead author,　Corresponding author   Language：English  

DOI： 10.1016/j.jiac.2024.01.013.

Other Link： https://www.sciencedirect.com/science/article/pii/S1341321X24000230?via%3Dihub

Peritonsillar abscess caused by Mycoplasma hominis and Fusobacterium necrophorum following oral sex Invited Reviewed

Hiroshi Morioka, Hideyuki Kaida, Mitsuru Nishio, Kenji Suga

Auris Nasus Larynx     2024.1

　More details

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.anl.2023.10.004

Catheter-related bloodstream infection caused by Lacticaseibacillus paracasei: A case report and literature review Reviewed

Yuto Fukuda Hiroshi Morioka, Shuta Yamamoto, Mitsutaka Iguchi, Shinichi Umeda, Takashi Asahara, Kohei Kanda, Keisuke Oka, Goro Nakayama, Tetsuya Yagi

Journal of Infection and Chemotherapy     2024.1

　More details

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jiac.2023.12.015.

Other Link： https://www.sciencedirect.com/science/article/pii/S1341321X24000023?via%3Dihub

A case of invasive rhinosinusitis caused by Penicillium brasilianum Invited Reviewed

Yuki Hirao, Hiroshi Morioka, Shinya Ozaki, Makoto Kawachi, Sayaka Ban, Takashi Yaguchi, Akira Watanabe

Medical Mycology Journal     2024

　More details

Authorship：Corresponding author   Publishing type：Research paper (scientific journal)