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Veterinary dermatology2021; 32(5); 474-e129; doi: 10.1111/vde.12993

Antifungal susceptibility of dermatophytes from racehorses in Japan.

Abstract: Luliconazole (LCZ) is an imidazole antifungal medication that exhibits excellent activity against dermatophytes. As a topical cream and lotion (approved for human use), LCZ has demonstrated a broad spectrum of activity against human dermatophytoses. Objective: This is the first study to investigate the in vitro susceptibility of clinical isolates from horse dermatophytoses to LCZ. Methods: No animals were used in this study. Methods: In the present study, the in vitro susceptibilities of clinical isolates of dermatophytes to LCZ, clotrimazole (CTZ), miconazole (MCZ) and terbinafine (TRF) were investigated using the Clinical & Laboratory Standards Institute M38-A2 test. Results: The minimum inhibitory concentrations (MICs) for all 16 clinical isolates of Trichophyton equinum, Microsporum equinum/canis and M. gypseum for LCZ were <0.03 mg/L. The MICs of all isolates were <0.03-0.5 mg/L for CTZ, 0.03-16 mg/L for MCZ and <0.03-1 mg/L for TRF. Conclusions: LCZ demonstrated a broad spectrum of activity against clinical isolates from horse dermatophytoses. We consider that LCZ will become the primary antifungal agent for treating horse dermatophytosis. Background: Le luliconazole (LCZ) est un imidazolé antifongique qui montre une excellente activité contre les dermatophytes. En crème et lotion topique (autorisé en médecine humaine), LCZ a montré un large spectre d'activité contre les dermatophytoses humaines. Objective: Ceci est la première étude qui explore la sensibilité in vitro des souches cliniques des dermatophytoses du cheval au LCZ. Unassigned: Aucun animal n'a été utilisé dans cette étude. MÉTHODES: Dans cette étude, les sensibilités in vitro des souches cliniques de dermatophytes au LCZ, clotrimazole (CTZ), miconazole (MCZ) et terbinafine (TRF) ont été étudiées à l'aide du test "Clinical & Laboratory Standards Institute M38-A2". RÉSULTATS: Les concentrations minimales inhibitrices (MICs) pour les 16 souches cliniques de Trichophyton equinum, Microsporum equinum/canis et Nannizia gypsea (anciennement M. gypseum) pour LCZ étaient <0.03 mg/L. Les MICs pour toutes les souches étaient <0.03-0.5 mg/L pour CTZ, 0.03-16 mg/L pour MCZ et <0.03-1 mg/L pour TRF. Conclusions: Le LCZ montre un large spectre d'activité contre les souches cliniques des dermatophytes du cheval. Nous considérons que LCZ deviendra l'agent antifongique principal pour le traitement des dermatophytoses chez le cheval. INTRODUCCIÓN: el luliconazol (LCZ) es un medicamento antifúngico imidazol que exhibe una excelente actividad contra los dermatofitos. Como crema y loción tópicas (aprobadas para uso humano), LCZ ha demostrado un amplio espectro de actividad contra las dermatofitosis humanas. Objective: Este es el primer estudio para investigar la susceptibilidad in vitro de aislados clínicos de dermatofitosis equina a LCZ. ANIMALES: no se utilizaron animales en este estudio. MÉTODOS: en el presente estudio, se investigó la susceptibilidad in vitro de aislados clínicos de dermatofitos a LCZ, clotrimazol (CTZ), miconazol (MCZ) y terbinafina (TRF) utilizando la prueba M38-A2 del Clinical & Laboratory Standards Institute. Results: Las concentraciones inhibitorias mínimas (MIC) para los 16 aislados clínicos de Trichophyton equinum, Microsporum equinum /canis y Nannizia gypsea (nombre anterior de M. gypseum) para LCZ fueron <0,03 mg/L. Las CMI de todos los aislamientos fueron <0,03-0,5 mg/L para CTZ, 0,03-16 mg/L para MCZ y <0,03-1 mg/L para TRF. Conclusions: LCZ demostró un amplio espectro de actividad contra aislados clínicos de dermatofitosis equina. Consideramos que LCZ se convertirá en el principal agente antifúngico para el tratamiento de la dermatofitosis equina. Unassigned: Luliconazol (LCZ) ist ein Imidazol, ein antimykotischer Wirkstoff, der eine exzellente Wirksamkeit gegenüber Dermatophyten zeigt. Als topische Creme und Lotion (zugelassen zum Humangebrauch), hat LCZ ein breites Spektrum an Aktivität gegenüber humanen Dermatopyhtosen gezeigt. Unassigned: Es handelt sich hierbei um die erste Studie, die die in vitro Empfindlichkeit von klinischen Isolaten von Pferden mit Dermatophytosen auf LCZ untersucht. Unassigned: Es wurden in dieser Studie keine Tiere verwendet. Methods: In der vorliegenden Studie wurden die in vitro Empfindlichkeiten von klinischen Isolaten von Dermatophyten auf LCZ, Clotrimazol (CTZ), Miconazol (MCZ) und Terbinafine (TRF) mittels Clinical& Laboratory Standards Institute M38-A2 Test untersucht. Unassigned: Die minimale inhibitorische Hemmkonzentration (MICs) für alle 16 klinischen Isolate von Trichophyton equinum, Microsporum equinum/canis und Nannizia gypsea (früherer Name für M. gypseum) lag bei LCZ <0,03 mg/L. Die MICs aller Isolate lagen bei < 0,03-0,05 mg/L für CTZ; bei 0,03-16 mg/L für MCZ und bei <0,03-1 mg/L für TRF. Unassigned: LCZ zeigte ein breites Spektrum an Aktivität gegenüber klinischen Isolaten von Dermatophytosen bei Pferden. Wir gehen davon aus, dass LCZ sich zum primären antimykotischen Wirkstoff bei der Behandlung von Dermatophytosen bei Pferden entwickeln wird. 背景: Luliconazole(LCZ) は, 皮膚糸状菌に対して優れた活性を示すイミダゾール系抗真菌薬である。LCZは外用クリームおよびローション (ヒト用として承認されている) として, ヒトの皮膚糸状菌症に対して幅広いスペクトルの活性を示している。 目的: 本研究は, 馬の皮膚糸状菌症から分離された臨床分離株のLCZに対するin vitro感受性を調べた初めての研究である。 供試動物: 本研究では動物を使用しなかった。 方法: 本研究では,LCZ,クロトリマゾール(CTZ) , ミコナゾール(MCZ)およびテルビナフィン(TRF)に対する皮膚糸状菌の臨床分離株のin vitro感受性を,Clinical & Laboratory Standards Institute M38-A2試験を用いて検討した。 結果: LCZに対するTrichophyton equinum,Microsporum equinum/canisおよびNannizia gypsea (M. gypseumの旧名) の全臨床分離株16株の最小発育阻止濃度(MIC) は0.03 mg/L未満であった。また, 全分離株のMICはCTZで<0.03˜0.5 mg/L,MCZで<0.03˜16 mg/L,TRFで<0.03˜1 mg/Lであった。 結論: LCZはウマ皮膚糸状菌の臨床分離株に対して幅広い活性を示した。今後, LCZは馬皮膚糸状菌症治療の主要な抗真菌薬となると考えられる。. 背景: 卢立康唑(LCZ)是一种咪唑类抗真菌药物, 对皮肤癣菌表现出极好的活性。作为一种外用乳膏和洗剂 (获批用于人类) , LCZ已显示出对人类皮肤癣菌病的广谱活性。 目的: 这是首次研究马皮肤癣菌病临床分离株对LCZ的体外敏感性。 动物: 本研究未使用动物。 方法: 在本研究中, 使用临床和实验室标准协会M38-A2试验研究皮肤癣菌临床分离株, 对LCZ、克霉唑(CTZ)、咪康唑(MCZ)和特比萘芬(TRF)的体外敏感性。 结果: 所有16株马毛癣菌、马小孢子菌/犬小孢子菌和石膏样奈尼兹皮肤癣菌 (曾用名石膏样小孢子菌) 临床分离株对LCZ的最低抑菌浓度(MIC)均 < 0.03 mg/L。所有分离株对CTZ、MCZ和TRF的MIC分别为 < 0.03-0.5 mg/L、0.03-16 mg/L和 < 0.03-1 mg/L。 结论: LCZ对马皮肤癣菌病临床分离株表现出广谱活性。我们认为LCZ将成为治疗马皮肤癣菌病的主要抗真菌药。. Unassigned: Luliconazol (LCZ) é um fármaco antifúngico imidazol que apresenta excelente atividade contra dermatófitos. Na forma de creme ou loção (aprovada para uso humano), LCZ demonstrou um amplo espectro de ação contra dermatofitoses humanas. Objective: Este é o primeiro estudo a investigar a suscetibilidade in vitro de isolados clínicos de dermatofitose equina ao LCZ. Unassigned: Não foram utilizados animais neste estudo. MÉTODOS: No presente estudo, investigou-se a suscetibilidade in vitro de isolados clínicos de dermatofitose a LCZ, clotrimazol (CTZ), miconazol (MCZ) e terbinafina (TRF) utilizando o teste M38-A2 do Clinical & Laboratory Standards Institute. Results: As concentrações inibitórias mínimas (MICs) dos 16 isolados de Trichophyton equinum, Microsporum equinum/canis e Nannizia gypsea (conhecido anteriormente como M. gypseum) para LCZ foram <0,03 mg/L. Os MICs de todos os isolados foram <0,03-0,5 mg/L para CTZ, 0,03-16 mg/L para MCZ e <0,03-1 mg/L para TRF. CONCLUSÕES: LCZ demonstrou um amplo espectro de atividade contra os isolados clínicos de dermatofitose equina. Nós consideramos que LCZ será um antifúngico de escolha no tratamento da dermatofitose em cavalos.
Publication Date: 2021-06-29 PubMed ID: 34189781DOI: 10.1111/vde.12993Google Scholar: Lookup
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  • Journal Article

Summary

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This research investigates the effectiveness of the antifungal medication, Luliconazole (LCZ), against dermatophytes found in racehorses. The study found that LCZ demonstrated a broad spectrum of activity against the clinical isolates of dermatophytes, indicating its potential as the primary treatment for horse dermatophytoses.

Background of the Study

  • The aim of the study was to investigate the in vitro susceptibility of clinical isolates from horse dermatophytoses to LCZ. Dermatophytoses are fungal infections caused by dermatophytes that typically affect the skin, hair, and nails of horses.
  • LCZ is an imidazole antifungal medication that has been shown to have excellent activity against dermatophytes. This medication is currently approved for human use as a topical cream and lotion.

Methodology of the Study

  • No animals were used in this study. Instead, clinical isolates of dermatophytes were collected from horses suffering from dermatophytoses.
  • The in vitro susceptibilities of these clinical isolates were then tested against LCZ, clotrimazole (CTZ), miconazole (MCZ), and terbinafine (TRF) using the Clinical & Laboratory Standards Institute M38-A2 test.

Results of the Study

  • The minimum inhibitory concentrations (MICs) of all 16 clinical isolates of Trichophyton equinum, Microsporum equinum/canis, and Nannizia gypsea (former name for M. gypseum) for LCZ were found to be less than 0.03 mg/L.
  • The MICs of all isolates for CTZ ranged from less than 0.03 to 0.5 mg/L, for MCZ from 0.03 to 16 mg/L, and for TRF from less than 0.03 to 1 mg/L.

Conclusion of the Study

  • Results of the study showed that LCZ demonstrated a broad spectrum of activity against clinical isolates from horse dermatophytoses. Thus, the researchers concluded that LCZ could potentially become the primary antifungal agent for treating horse dermatophytosis.

Cite This Article

APA
Watanabe R, Huruta H, Ueno Y, Nukada T, Niwa H, Shinyashiki N, Kano R. (2021). Antifungal susceptibility of dermatophytes from racehorses in Japan. Vet Dermatol, 32(5), 474-e129. https://doi.org/10.1111/vde.12993

Publication

ISSN: 1365-3164
NlmUniqueID: 9426187
Country: England
Language: English
Volume: 32
Issue: 5
Pages: 474-e129

Researcher Affiliations

Watanabe, Ryousuke
  • Department of Veterinary Dermatology, Nihon University College of Bioresource Sciences, Fujisawa, Kanagawa, Japan.
Huruta, Hikaru
  • Department of Veterinary Dermatology, Nihon University College of Bioresource Sciences, Fujisawa, Kanagawa, Japan.
Ueno, Yuji
  • Racehorse Hospital, Miho Training Center, Japan Racing Association, Inashiki, Ibaraki, Japan.
Nukada, Toshio
  • Microbiology Division, Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan.
Niwa, Hidekazu
  • Microbiology Division, Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan.
Shinyashiki, Naoki
  • Racehorse Hospital, Miho Training Center, Japan Racing Association, Inashiki, Ibaraki, Japan.
Kano, Rui
  • Department of Veterinary Dermatology, Nihon University College of Bioresource Sciences, Fujisawa, Kanagawa, Japan.

MeSH Terms

  • Animals
  • Antifungal Agents / pharmacology
  • Arthrodermataceae
  • Horses
  • Japan / epidemiology
  • Microbial Sensitivity Tests / veterinary
  • Microsporum
  • Trichophyton

References

This article includes 10 references
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