{"title":"Evaluation of Hepatic and Renal Function Algorithms for Fosravuconazole in Real-World Clinical Practice.","authors":"Harunari Shimoyama, Yoshihiro Sei","doi":"10.3314/mmj.25-00042","DOIUrl":"10.3314/mmj.25-00042","url":null,"abstract":"<p><strong>Background: </strong>Oral antifungal therapy is the standard treatment for onychomycosis. However, many physicians still prefer topical agents because of concerns about adverse effects.</p><p><strong>Objectives: </strong>This study evaluated changes in hepatic and renal function parameters during fosravuconazole therapy and assessed the utility of an algorithmic approach for interpreting these abnormalities.</p><p><strong>Methods: </strong>Laboratory parameters including aspartate aminotransferase (AST), alanine aminotransferase (ALT), γ glutamyltransferase (γ-GTP), serum creatinine (sCr), and estimated glomerular filtration rate (eGFR) were compared between baseline and follow-up. Fold changes were calculated, and γ-GTP was classified according to the LiverTox database. Each parameter was assessed using an algorithm for managing hepatic and renal side effects.</p><p><strong>Results: </strong>A total of 128 cases were analyzed. Median baseline values were AST 22 U/L, ALT 19 U/L, γ-GTP 25 U/L, sCr 0.75 mg/dL, and eGFR 74.9 mL/min/1.73 m². At follow-up, values were AST 22 U/L, ALT 22 U/L, γ-GTP 51.5 U/L, sCr 0.86 mg/dL, and eGFR 67.1 mL/min/1.73 m². γ-GTP showed significantly greater fold changes than other parameters (p < 0.001). Thresholds for discontinuation were met in 3 hepatic (2.3%) and 5 renal (3.9%) cases. No patient developed clinical symptoms, and only one discontinued treatment.</p><p><strong>Conclusions: </strong>Algorithm-based monitoring enabled safe fosravuconazole administration. This practical approach may help clinicians adopt oral antifungal therapy more confidently as first-line treatment for onychomycosis.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 2","pages":"97-101"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148140650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Antifungal Pharmacokinetics/Pharmacodynamics.","authors":"Yusuke Yagi, Yukihiro Hamada","doi":"10.3314/mmj.26.003","DOIUrl":"10.3314/mmj.26.003","url":null,"abstract":"<p><p>The optimization of antifungal therapy based on pharmacokinetics/pharmacodynamics (PK/PD) principles is crucial for improving outcomes in invasive fungal infections; however, its clinical application faces considerable hurdles. This review presents a comprehensive overview of current knowledge and aims to bridge basic research and clinical practice. We outline the fundamental concepts of PK/PD and the characteristics of the major antifungal drug classes (polyenes, echinocandins, flucytosines, and azoles), along with preclinical evidence defining the main PK/PD indices (maximum concentration to minimum inhibitory concentration ratio, 24-h area under the concentration-time curve to the minimum inhibitory concentration ratio, and percentage of time the concentration remains above the minimum inhibitory concentration). Key challenges hindering translation are critically analyzed, including substantial knowledge gaps-particularly for filamentous fungi; high inter-patient pharmacokinetic variability complicating standard dosing; limitations of therapeutic drug monitoring (TDM); the narrow therapeutic window requiring careful balance between efficacy and toxicity; and the role of suboptimal exposure in antifungal resistance. Current strategies, including antifungal stewardship, are discussed, and future directions highlighted. Prioritizing research on understudied pathogens, improving TDM, developing novel agents, and strengthening collaboration between basic research and clinical practice are essential. A deeper understanding and effective application of PK/PD principles are vital to advance personalized antifungal therapies and improve patient outcomes.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 1","pages":"53-59"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147329116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparing the Minimum Inhibitory Concentrations and Minimum Fungicidal Concentrations of Antifungal Drugs in Microsporum canis.","authors":"Honoka Nojo, Akira Watanabe, Koichi Makimura, Rui Kano","doi":"10.3314/mmj.25-00024","DOIUrl":"10.3314/mmj.25-00024","url":null,"abstract":"<p><p>To assess the minimum inhibitory concentration (MIC) and the minimum fungicidal concentration (MFC) of itraconazole (ITCZ), terbinafine (TBF), and miconazole (MCZ) in eight isolates of Microsporum canis. The MICs in the eight tested strains were < 0.03 mg/L for TBF, < 0.03 to 0.125 mg/L for ITCZ, and 1 to 4 mg/L for MCZ. The MFCs in the eight strains were 0.5 to 2 mg/L for TBF, 2 to > 32 mg/L for ITCZ, and 16 to > 32 mg/L for MCZ. These results suggested that there were strains with MFC concentrations much higher than the MIC concentrations, indicating fungistatic activity.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 1","pages":"79-81"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147329122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Managing Azole Resistance in Aspergillus.","authors":"Hisako Kushima, Hiroshi Ishii","doi":"10.3314/mmj.26.008","DOIUrl":"10.3314/mmj.26.008","url":null,"abstract":"<p><p>Azole antifungals are the cornerstone of therapy for aspergillosis, yet the global rise in azole-resistant Aspergillus fumigatus has become a major clinical concern. Resistance rates vary widely across regions, with particularly serious implications for chronic pulmonary aspergillosis (CPA), which requires long-term azole therapy. Resistance mechanisms largely involve cyp51A mutations, although additional genetic alterations and environmental factors, such as agricultural azole use, also play important roles. Cross-resistance among azoles is frequent, leaving clinicians with limited alternatives, such as liposomal amphotericin B or echinocandins, which are constrained by toxicity, fungistatic activity, and intravenous administration. Currently, antifungal susceptibility testing for filamentous fungi remains technically demanding and is not routinely available in many countries, including Japan, further complicating its management. Emerging approaches include the development of novel antifungal compounds and optimization of existing drugs through inhaled or nanoformulated delivery systems. Furthermore, fungal vaccines are attracting increasing attention as promising long-term solutions to stagnant antifungal pipelines and the growing challenge of drug resistance.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 2","pages":"117-123"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148140638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Anticandidal Efficacy of a Paste Containing Capric Acid and a Lysozyme-Chitosan Oligosaccharide Conjugate.","authors":"Mayu Miyanohara, Hidenori Yamada, Takako Nakatsuka, Masaaki Okamoto, Nobuhiro Hanada, Hiroki Kageshima, Shouichirou Hirano, Takatoshi Murata","doi":"10.3314/mmj.26-00002","DOIUrl":"https://doi.org/10.3314/mmj.26-00002","url":null,"abstract":"<p><p>We report a case series evaluating a novel oral care paste containing capric acid and a lysozyme-chitosan oligosaccharide conjugate (LYZOX). Ten patients with asymptomatic oral Candida colonization performed twice-daily self-care. Clinical eradication was achieved in 80% of cases, including polymicrobial infections involving Candida albicans, Candida glabrata, and Candida parapsilosis. This non-pharmacological approach effectively eliminated Candida species without adverse effects, suggesting a safe, daily preventive strategy for asymptomatic carriers in the maintenance phase of dental treatment.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 3","pages":"207-211"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148860540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of a Visual Assay Based on Colony Diameter Measurement for Drug Susceptibility Testing of Poorly Sporulating Fungi.","authors":"Takahito Toyotome, Akira Watanabe, Sayaka Ban, Takashi Yaguchi","doi":"10.3314/mmj.26-00007","DOIUrl":"https://doi.org/10.3314/mmj.26-00007","url":null,"abstract":"<p><p>Antifungal susceptibility testing is essential for guiding the clinical management of fungal infections. However, the standard method for broth dilution testing of filamentous fungi requires spore suspensions and is therefore unsuitable for poorly sporulating fungal species or strains. Some Aspergillus lentulus strains sporulate poorly, and Schizophyllum commune is a clinically relevant non-sporulating fungus for which preparing homogeneous inocula remains challenging. In this study, we developed an agar‑based visual assay to evaluate relative growth inhibition without requiring spores. Using 6‑well plates containing varying concentrations of itraconazole (ITCZ) or voriconazole (VRCZ), the colony diameters of A. lentulus and S. commune were measured after 24 hours and 48 hours, respectively, and normalized to those of the drug‑free control. A. lentulus exhibited clear growth inhibition at 0.25 µg/mL ITCZ, but further increases in concentration did not result in proportionally greater inhibition under the present assay conditions. In contrast, VRCZ markedly and dose‑dependently reduced colony diameter, resulting in only < 10% growth at 4 µg/mL. ITCZ susceptibility varied widely among S. commune strains, whereas VRCZ consistently inhibited growth at concentrations ≥ 1 µg/mL. These susceptibility patterns aligned with previously reported minimum inhibitory concentration ranges for both species. Notably, our method also accommodated slow‑growing strains and allowed extended incubation when necessary. Although not directly comparable to standardized minimum inhibitory concentration methods, our agar‑based assay provides a practical and visually interpretable means to assess drug susceptibility in A. lentulus and S. commune under the tested conditions.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 3","pages":"165-176"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148860633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Refractory Azole-Resistant Candida albicans Renal and Perirenal Abscess Requiring Nephrectomy.","authors":"Nobuaki Mori, Kana Matsumoto, Ryosuke Shoji, Emiko Mura, Kazuhiko Oshinomi, Yasuyuki Ohira, Masahiro Abe, Ami Koizumi, Masahito Oda, Masayuki Maeda, Keiko Ishino, Issei Tokimatsu","doi":"10.3314/mmj.25-00043","DOIUrl":"10.3314/mmj.25-00043","url":null,"abstract":"<p><p>We describe a male in his fifties with a refractory azole-resistant Candida albicans renal and perirenal walled-off abscess. C. albicans developed acquired azole-resistance during fluconazole (FLCZ) therapy. Despite FLCZ penetrating the walled-off abscess (11.1 μg/g) with levels exceeding those in normal renal tissue, the infection persisted, necessitating nephrectomy. Despite no amino acid substitutions in the ERG11 gene as revealed by genetic analysis, a Rhodamine 6G assay demonstrated a 4.5- to 6.6-fold increase in efflux activity in the resistant isolates in comparison with the susceptible controls, suggesting efflux pump-mediated resistance. Following surgery, the patient developed emphysematous pyelonephritis in the contralateral kidney due to azole-resistant C. albicans. This case demonstrates that even substantial tissue penetration cannot overcome high-level, effluxmediated resistance within walled-off lesions, underscoring the critical importance of surgical source control.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 3","pages":"193-197"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148860639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"In vitro Testing of Trichophyton indotineae Susceptibility to Essential Oil Components Citral and Thymol.","authors":"Kanon Tsurumi, Sanae A Ishijima, Rui Kano","doi":"10.3314/mmj.25-00035","DOIUrl":"10.3314/mmj.25-00035","url":null,"abstract":"<p><p>Tinea corporis caused by Trichophyton indotineae infection is a worldwide epidemic and represents a growing challenge, given that many strains of this dermatophyte are resistant to the antifungal drugs (allylamine and azoles) typically used to treat dermatophytosis. Phytochemicals isolated from essential oils are effective alternatives for inhibiting microbial pathogens. In the present study, we performed in vitro susceptibility testing of the phytochemicals citral and thymol against T. indotineae strains, including a multi-drug-resistant isolate. The susceptibility of T. indotineae to citral, and thymol was assessed using the modified CLSI M38-A2 guideline broth microdilution method. The ranges of the minimum inhibitory concentration (MIC, expressed as a percentage) of the phytochemicals in all isolates were 0.0015 to 0.006% for citral and thymol. Citral and thymol appear effective against T. indotineae at the tested concentrations, and therefore may be of use in skin care items intended to protect from this infection.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 2","pages":"143-145"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148140616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Biofilm and Dermatophytoma.","authors":"Tomotaka Sato, Norihito Fukada, Hisashi Kobayashi, Aya Okaniwa, Miyuki Okada, Kazuto Yamazaki","doi":"10.3314/mmj.26.006","DOIUrl":"10.3314/mmj.26.006","url":null,"abstract":"<p><p>Dermatophytoma is a type of onychomycosis with distinctive clinical features. Clinically, it typically appears as a linear spike, triangular, or round white- or yellow-colored mass on the nail plate. Dermatophytes are thought to adhere to the nail surface and secrete extracellular polysaccharides (EPS), proteins, DNA, and other components, forming a biofilm matrix. EPS typically encases this microbial aggregation and is synthesized by the microbial constituents of the biofilm. Herein, we review dermatophytoma and the relationship between nail infection and biofilm. We also discuss green nails with dermatophytoma and infection models of biofilm formation.</p>","PeriodicalId":520314,"journal":{"name":"Medical mycology journal","volume":"67 1","pages":"71-77"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147329088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}