• Journal of Veterinary Clinics
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• v.23 no.4
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• pp.405-410
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• 2006

Using internal transcribed spacer 1 (ITS1) region ribosomal DNA sequences from 9 strains of Microsporum canis and 5 strains of Microsporum gypseum isolated from dogs and a cat with dermatophytosis, we demonstrated the mutual phylogenetic relationship of these strains. Nucleotide sequence analysis of the ITS 1 gene fragments from the 9 strains of M canis had the 100% nucleotide sequence similarities and the 5 strains of M gypseum also had the 100% nucleotide sequence similarities. The phylogenetic analysis of the nucleotide sequences of the 9 strains of M canis formed a nested cluster with the reference strains of M canis originating from USA, Australia, Japan, and Europe. M canis were genetically distinct from the other reference strains of Microsporum spp, but M distortum, M equinum, and M. ferrugineum were genetically very close to M canis. M gypseum from a cluster in the phylogenetic tree with M canis as an outgroup. The molecular analysis of ITS 1 genes provided the useful information for the identification of these microsporum species and the understanding of their relationship.

• Journal of Veterinary Clinics
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• v.15 no.1
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• pp.196-198
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• 1998

젊은 말과 그 관리인에게 발생한 Microsporum canis 감염에 의한 백선에 대해 보 고하였다. 말과 사람에 있어서의 진단은 피부 병변의 KOH 표본에서 피부사상균을 직접 증명 하고,감염된 인설의 순수 배양물로부터 Microsporum canis를 분리한 것에 근거를 두었다. 말과 사람에 서 분리하고, PHOL 염색액으로 염색한 Microsporum canis는 현미경으로 자세히 관찰했을 때 형태학 적인 차이를 나타내지 않았다. 말에 있어서 옥도정기와 사람에 있어서 miconazole에 의한 국 소 요법은 효과적이었다. 병력은 관리인이 말로부터 감염된 것을 제시하였다.

• Korean Journal of Veterinary Research
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• v.28 no.1
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• pp.111-113
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• 1988

To elucidate the distribution of mating type of Microsporum canis, originated from animals in Korea, a total of 272 strains of M. canis isolated from dogs and cats were mated with the tester strains of Nannizzia otae. Among 272 strains of M. canis examined, 217 strains(79.8%) were N. otae-, but none of strains showed+mating type. And 55 strains(20.0%) were reacted with neither N. otae+nor N. otae-.

• Korean Journal of Veterinary Research
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• v.41 no.2
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• pp.167-172
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• 2001

The present study was conducted to examine morphological and biological characteristics of 57 strains of Microsporum canis isolated from 110 dogs with dermatophytosis in Taegu, 1999. Isolated strains of M canis were classified into 4 types(A: white-yellow type, B: fluffy type, C: flat type, D: radial groove type) according to their pigmentation and morphology of colonies with typical conidia and hyphae. Some strains of A and B type happened variation by subculture for 6~8 months. The variation strains were classified into 3 types(E, F, G), E type had aberrant macroconidia with typical macroconidia, F type had aberrant hyphae(like dumb-bell) and macroconidia, and G type had no conidia and racket hyphae. All strains showed positive urease test, rice medium growth test and hair perforation test.

• Journal of Veterinary Clinics
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• v.22 no.4
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• pp.371-376
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• 2005

The aim of this study was to determine tile inhibitory effect of granitic powder against Microsporum canis. Fourteen strains of M. canis isolated from dgs and cats with fungal dermatitis and two strains isolated from humans were used in this study. The in vitro antifungal activities of granitic powder and 5 commercialized antifungal agents (terbinafine, itraconazole, ketoconazole, griseofulvin and fluconazole) were compared. The antifungal effect was measured by the broth microdilution method and was expressed as the minimal inhibitory concentration (MIC). The MIC value of the granitic powder was ranged from 31.3 to 250mg/ml. Terbinafine showed the lowest MIC value among the 5 commercial antifungal agents $(0.0078-0.125{\mu}g/ml)$, while fluconazole showed the highest MIC values $(125-1,000{\mu}g/ml)$. The MIC range of itraconazole, griseofuvin and ketoconazole were $0.125-0.5{\mu}g/ml\;0.625-5{\mu}g/ml$ and $10-40{\mu}g/ml$ respectively. The Geometric mean(GM) MIC values of terbinafine and ketoconazole against M. canis isolated from human were $0.0078{\mu}g/ml\;and\;10{\mu}g/ml$, respectively, while the GM MIC values of these agents against M. canis isolated from animals were $0.063{\mu}g/ml\;and\;31.4{\mu}g/ml$, respectively. Other antifungal agents did not show any significant differences in antifungal activity against M. canis of animal or human origin. Although granitic powder was shown to have antifungal activity, it was much lower than that of the 5 commercialized antifungal agents.

• Korean Journal of Veterinary Research
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• v.41 no.2
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• pp.173-176
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• 2001

The present study was conducted to examine the drug susceptibility of 57 strains of Microsporum canis isolated from dogs with dermatitis in Taegu, 1999. Antifungal susceptibility test was performed by the microdilution method, using 7 antifungal drugs as follows: itraconazole(I), terbinafine(T), ketoconazole(K), griseofulvin(G), amphotericin B(A), flucytosine(5-Fc)(F), tolnaftate(To). All tester strains of M canis were highly susceptible to T, I, K and To(geometric mean $MICs{\leq}0.007{\sim}0.155{\mu}g/ml$), while those were lowly susceptible to G, A and F(geometric mean MICs $0.285{\sim}26.430{\mu}g/ml$).

• The Korean Journal of Pharmacology
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• v.5 no.1
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• pp.51-54
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• 1969

The fungistatic effects of extract and crystal (A) of Berberis Koreans Palibin, a common shrub in Korea, were obeserved and compared with undecylenic acid and vegetable oil. In vitro studies, the spores of fungi were inoculated on Sabouraud's glucose agar media which contained compounds of various concentration, and the growth of the fungi was observed for 3 weeks. The species of the fungi used in these experiments were Epidermophyton floccosum, Microsporum gypseum, Microsporum audouini, Microsporum canis, Microsporum nanum, Microsporum cookei, Trichophyton rubrum, Trichophyton mentagrophytes, Trichophyton tonsurans and Trichophyton verrucosum. The results of the studies were as follows: 1. The growth of E. floccosum, M. audouni, M. canis, M. nanum, M. cookei, was inhibited in Sabouraud's glucose agar media containing extract and crystal (A) of Berberis Koreana Palibin 1 mg/ml.

• Korean Journal of Clinical Laboratory Science
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• v.38 no.2
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• pp.94-98
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• 2006

The mattresses and dust in the bed rooms of nine dermatophytes infected patients and nine domestic animals were examined by the KOH method. Microsporum canis species and Trichophyton mentagrophytes were isolated from cats and rabbits, respectively. The sources of infection of three patients were the M. canis infected cats raised by them and the four other patient's sources of infection were not confirmed. The sites of infection of the nine patients were their heads and those of the domestic animals were their heads and bodies. M. canis species were isolated from the infection sites of three cats and specimens collected by hair brush from the nine domestic animals. T. mentagrophytes species were also isolated from the infection sites of two rabbits. The seven patients had mattresses and bed room dust contaminated with M. canis.

• Journal of Veterinary Science
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• v.22 no.1
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• pp.4.1-4.13
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• 2021

Background: Microsporum canis is a zoonotic disease that can cause dermatophytosis in animals and humans. Objectives: In clinical practice, ketoconazole (KTZ) and other imidazole drugs are commonly used to treat M. canis infection, but its molecular mechanism is not completely understood. The antifungal mechanism of KTZ needs to be studied in detail. Methods: In this study, one strain of fungi was isolated from a canine suffering with clinical dermatosis and confirmed as M. canis by morphological observation and sequencing analysis. The clinically isolated M. canis was treated with KTZ and transcriptome sequencing was performed to identify differentially expressed genes in M. canis exposed to KTZ compared with those unexposed thereto. Results: At half-inhibitory concentration (½MIC), compared with the control group, 453 genes were significantly up-regulated and 326 genes were significantly down-regulated (p < 0.05). Quantitative reverse transcription polymerase chain reaction analysis verified the transcriptome results of RNA sequencing. Gene ontology enrichment analysis and Kyoto Encyclopedia of Genes and Genomes enrichment analysis revealed that the 3 pathways of RNA polymerase, steroid biosynthesis, and ribosome biogenesis in eukaryotes are closely related to the antifungal mechanism of KTZ. Conclusions: The results indicated that KTZ may change cell membrane permeability, destroy the cell wall, and inhibit mitosis and transcriptional regulation through CYP51, SQL, ERG6, ATM, ABCB1, SC, KER33, RPA1, and RNP genes in the 3 pathways. This study provides a new theoretical basis for the effective control of M. canis infection and the effect of KTZ on fungi.

• Korean Journal of Veterinary Research
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• v.33 no.2
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• pp.235-239
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• 1993

This study was performed to examine the distribution of dermatophytes in asymptomatic 454 dogs and 106 cats and in 19 dogs with skin lesions in Taegu The results obtained were summarized as follows ; The causative agent was identified a Microsporum(M) canis in 4 dogs with skin lesions. The isolation rates of dermatophytes were 10.1%(46/454) in asymptomatic dogs and 33.0%(35/106) in asymptomatic cats. The isolation rates of dermatophytes in dogs and cats were lower at house than that at pet cannel and animal care center, and that in females were higher than that in males. From dogs, 43(93.5%) of M canis and 3(6.5%) of M gypseum, and from cats, 33(94.2%) of M canis, 1(2.9%) of M gypseum and M nanum were isolated.