414 results match your criteria: "Department of Clinical Infectious Diseases[Affiliation]"

Background: Fidaxomicin (FDX) has received considerable attention as a novel therapeutic alternative agent to vancomycin (VCM) for Clostridioides difficile infection (CDI). However, the superiority and efficacy profile of FDX are not sufficiently determined by high-quality evidence. This study aimed to clarify the superiority of FDX for CDI treatment through a systematic review and meta-analysis.

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Could quick SOFA and SOFA score be a predictive tool for 30-day and in-hospital mortality in acute empyema?

J Infect Chemother

December 2022

Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Nagakute, 480-1195, Aichi, Japan. Electronic address:

While acute empyema is a critical infectious disease showing a high mortality rate, there are no prognostic tools to evaluate the disease severity and prognosis for patients. We conducted a retrospective cohort to determine whether quick Sequential Organ Failure Assessment (qSOFA) and SOFA score can predict the disease severity and prognosis of acute empyema. A total of 53 patients were enrolled in the study.

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Although a 2 g once daily administration of ceftriaxone remains the standard dosing regimen for the treatment of aspiration pneumonia, there are no studies to investigate the optimal dosing method. Hence, we retrospectively evaluated the effectiveness and safety of 1 g twice daily versus 2 g once daily administration of ceftriaxone in adult patients with aspiration pneumonia. Patients who received ceftriaxone for the treatment of aspiration pneumonia between 2015 and 2021 were included in this study.

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Effect of Casirivimab/Imdevimab Treatment on Serum Type I Interferon Levels in SARS-CoV-2 Infection.

Viruses

June 2022

Department of Clinical Infectious Diseases, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan.

The effects of casirivimab and imdevimab (C/I) on the innate immune response against SARS-CoV-2 infection remain unclear. We evaluated the effect of C/I on type I interferon (IFN-I) and cytokines in patients with SARS-CoV-2 infection. This prospective observational study recruited consecutive patients hospitalized with SARS-CoV-2 infection.

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Article Synopsis
  • Invasive extraintestinal pathogenic Escherichia coli (ExPEC) disease is a serious global health issue, particularly due to emerging multidrug-resistant strains, necessitating the development of multivalent vaccines targeting specific O-serotypes.
  • A study conducted in Japan analyzed E. coli blood isolates from elderly patients, revealing that O25 was the most prevalent serotype, accounting for 28.7% of the isolates, and that 19% of the isolates exhibited multidrug resistance.
  • The data indicate that O25B specifically showed the highest levels of multidrug resistance, which could significantly inform the creation of new vaccines aimed at preventing ExPEC-related infections.
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Background: Surgical antimicrobial prophylaxis (SAP) is one of the major purposes of antimicrobial use.

Aim: To determine the adherence to the Japanese SAP guidelines in Japanese university hospitals.

Methods: This was a retrospective cohort study including 15 general hospitals and one dental university hospital.

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Multidrug-resistant (MDR) bacteremia is a serious health care-associated infection with significant morbidity and excess hospitalization costs. Our aim is to study the association between incidences of MDR bacteremia, antibiotic consumption, and infection control measures in a hospital from 2013 to 2018. We analyzed the following indices: (1) incidence of bacteremia (carbapenem-resistant , , and , methicillin-resistant , vancomycin-resistant ); (2) use of antibiotics; (3) consumption of disinfectant solutions for hand hygiene; and (4) isolation rates of MDR carrier patients.

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Background: A 1% potassium peroxymonosulphate-based environmental disinfectant (PPED) produces sodium hypochlorite when combined with sodium chloride, which functions as a disinfectant. However, little is known about the impact of hospital cleaning with PPED on hospital-onset Clostridioides difficile infection (HO-CDI).

Aim: To reduce HO-CDI, we promoted antimicrobial stewardship and hospital ward cleaning with PPED: this study was conducted to evaluate their impact.

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A 19-Year Study of Dental Needlestick and Sharps Injuries in Japan.

Int Dent J

February 2023

Liaison Centre for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan; Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Miyagi, Japan.

Background: Needlestick and sharps injuries (NSIs) are serious problems for dental health care workers (DHCWs) because they are at risk for occupational blood-borne infections. In this study, risk factors for NSIs in DHCWs at Tohoku University Hospital (TUH) in Japan over 19 years were analysed.

Methods: NSI data of DHCWs at TUH from April 2002 to March 2020 were collected from the Exposure Prevention Information Network (EPINet) and statistically analysed.

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A novel hamster model of SARS-CoV-2 respiratory infection using a pseudotyped virus.

Sci Rep

July 2022

Department of Microbiology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan.

Article Synopsis
  • Research on SARS-CoV-2 is restricted due to it being a BSL-3 pathogen, leading scientists to use pseudotyped viruses in BSL-2 environments for safe evaluation.
  • Hamsters were inoculated with a luciferase-expressing VSV-based SARS-CoV-2 pseudotyped virus, showing increased lung luminescence that peaked at 48 hours, indicating infection replication.
  • The pseudotyped model is effective for studying the viral entry processes without the need for live SARS-CoV-2 or genetic modifications, providing a safer alternative for research.
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Article Synopsis
  • Pediatricians need solid pharmacologic knowledge to effectively study drug behavior (PK/PD) and treat children with antibiotics, but data on this is often limited due to challenges in conducting these studies in kids.
  • To address this data gap, promoting population PK/PD analysis is essential, as it allows researchers to work with sparse data from individual patients and tailor treatment dosages more accurately.
  • The summary highlights current pediatric PK/PD studies on antimicrobials in Japan, emphasizing the critical role of population PK/PD analysis in clinical and research settings.
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Although combination therapy using trimethoprim-sulfamethoxazole (TMP-SMX) plus echinocandins has been reported to reduce the mortality of patients with pneumocystis pneumonia (PCP), it remains unclear whether it is more effective than TMP-SMX monotherapy, the current first-line treatment for this disease. Hence, we performed a systematic review and meta-analysis to compare the efficacies of these treatment options for PCP. The Scopus, EMBASE, PubMed, CINAHL, and Ichushi databases were searched for studies (up to January 2022) reporting the mortality and positive response rates (fewer clinical symptoms, improved partial pressure of arterial oxygen, and resolution of pneumonitis on chest imaging) of PCP patients receiving monotherapy or combination therapy.

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Vancomycin or daptomycin is administered to hemodialysis patients infected with methicillin-resistant Staphylococcus and Enterococcus species. Although serious concerns regarding nephrotoxicity due to vancomycin have been raised, it might not be a critical issue in hemodialysis patients. Moreover, very few studies have investigated the effectiveness of vancomycin versus daptomycin in patients undergoing hemodialysis.

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Introduction: The results from the phase 3 study that evaluated the efficacy and safety of tedizolid phosphate, an oxazolidinone drug, for the treatment of gram-positive ventilated hospital-acquired bacterial pneumonia (vHABP)/ventilator-associated bacterial pneumonia (VABP) compared with linezolid (VITAL study), have been previously reported. We conducted a subgroup analysis to report the data obtained from Japanese patients enrolled in this study.

Methods: Patients aged ≥18 years with vHABP/VABP likely to be caused by gram-positive cocci were randomized 1:1 to tedizolid phosphate 200 mg once daily for 7 days or linezolid 600 mg twice daily for 10 days.

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Effectiveness of the third dose of BNT162b2 vaccine on neutralizing Omicron variant in the Japanese population.

J Infect Chemother

September 2022

Department of Clinical Infectious Diseases, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan; Clinical and Research Center for Infectious Diseases, Toyama University Hospital, Toyama, Japan.

Article Synopsis
  • The study investigates the effectiveness of booster vaccinations against COVID-19 variants, particularly in Japan, where the booster significantly enhances humoral immunity following initial vaccination.
  • Serum samples from healthcare workers showed a dramatic increase in anti-SARS-CoV-2 antibody levels after receiving the booster, elevating neutralizing activity against both Delta and Omicron variants.
  • The results also noted that individuals who experienced certain side effects (like fever and fatigue) exhibited higher antibody responses, suggesting a correlation between booster reactions and immune effectiveness.
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Lemierre Syndrome Due to : A Case Report.

Infect Drug Resist

May 2022

Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Nagakute, Aichi, 480-1195, Japan.

Article Synopsis
  • * CT scans revealed serious complications such as peritonsillar abscesses and internal jugular vein thrombosis, leading to prompt treatment that included antibiotics and surgical drainage.
  • * The analysis highlighted poor oral hygiene as a risk factor for severe bacterial infections and emphasized the importance of 16S rRNA sequencing for accurately identifying the causative microorganisms in cases where conventional methods fail.
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A high incidence of genital infections, such as vulvovaginal candidiasis, has been reported in patients with diabetes treated with sodium-glucose co-transporter type 2 inhibitors. This is because Candida growth and virulence are enhanced in high glucose environments. Our previous study demonstrated that the adhesive interaction between Candida complement receptors and a ligand on vaginal epithelial cells (intracellular adhesion molecule-1: ICAM-1) is a factor for Candida albicans colonization, and the high ICAM-1 expression by vaginal epithelial cells exposed to high glucose conditions increases C.

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Article Synopsis
  • Researchers have developed many effective antibodies for treating SARS-CoV-2, but their effectiveness is declining against new variants like Omicron.* -
  • A particular antibody, UT28K, was found in individuals who recovered from severe COVID-19 and has shown strong neutralizing effects against the virus, even though its efficacy against Omicron is somewhat limited.* -
  • Structural studies suggest that UT28K binds effectively to the virus, and it's unlikely that a resistant variant of SARS-CoV-2 will emerge that could outcompete existing strains.*
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Pathophysiological mechanism of non-HIV Pneumocystis jirovecii pneumonia.

Respir Investig

July 2022

Department of Clinical Infectious Diseases, Aichi Medical University, Nagakute, Aichi, Japan. Electronic address:

While Pneumocystis jirovecii pneumonia (PCP) can occur in immunocompromised patients with HIV infection, the prognosis of non-HIV PCP is still poor, showing a high mortality rate of 30%-75%. The pathophysiological mechanism of non-HIV PCP is quite different from that of HIV-PCP. Aging, underlying disease, dysbiotic gut microbiome, and Th1 predominance, leads to macrophagic polarization shifting from M2 to M1.

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Article Synopsis
  • A population-based study in Japan analyzed invasive pneumococcal disease (IPD) among adults from 2013 to 2019, focusing on clinical characteristics and serotype distribution following the introduction of the pediatric 13-valent pneumococcal conjugate vaccine (PCV13).
  • The study found a reduction in fatal outcomes and a significant decrease in infections from serotypes covered by PCV13 among adults aged 15-64, while nonvaccine serotypes increased in those aged ≥ 65.
  • The findings suggest that the pediatric PCV13 vaccination has a positive indirect effect on reducing IPD incidence in adults, which supports future vaccination strategies for older populations in
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Correction of thrombocytopenia caused by linezolid with scheduled sequential tedizolid use in patients with vertebral osteomyelitis by antibiotic resistant Gram-positive organisms.

J Infect Chemother

July 2022

Department of Infection Control and Prevention, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan; Department of Clinical Infectious Diseases, Tokoname City Hospital, Tokoname, Aichi, Japan. Electronic address:

Introduction: Because of thrombocytopenia, linezolid treatment tends to be stopped before the completion of therapy for complicated infections that require prolonged antimicrobial administration. In contrast, tedizolid shows a favorable hematologic profile. The primary end-point of this study was to evaluate the efficacy of switching treatment to tedizolid in patients who developed thrombocytopenia during linezolid therapy.

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There is increasing evidence regarding the optimal therapeutic strategies for multidrug-resistant (MDR) bacteria that cause common infections and are resistant to existing antibiotics. Combination therapies, such as β-lactam combined with β-lactamase inhibitors or combination antibiotics, is a therapeutic strategy to overcome MDR bacteria. In recent years, the therapeutic options have expanded as certain combination drugs have been approved in more countries.

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Among (MP) is one of the major pathogens causing lower respiratory tract infection. Macrolide-resistant (MRMP) isolates have been increasing and has become a global concern, especially in East Asian countries. This affects the treatment of MP infection; that is, some patients with MRMP infections fever cannot be controlled despite macrolide therapy.

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Risk factors of first recurrence of Clostridioides difficile infection.

Anaerobe

June 2022

Department of Clinical Infectious Diseases, Aichi Medical University Graduate School of Medicine, Japan; Department of Infection Control and Prevention, Aichi Medical University Hospital, Japan; Department of Clinical Infectious Diseases, Aichi Medical University Hospital, Japan. Electronic address:

Article Synopsis
  • Clostridioides difficile infection (CDI) frequently recurs in patients, with about 25% experiencing a relapse after initial treatment, especially if they've had a previous relapse.
  • A study of 134 patients revealed that the use of prophylactic probiotics and nasogastric tube feeding were significant risk factors for the initial recurrence of CDI.
  • The findings suggest that patients using prophylactic probiotics tend to have higher recurrence rates, highlighting a potential vulnerability for CDI during probiotic use.
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