The present study was conducted to examine the outbreak state of bovine dermatophytosis in 14 farms(4 dairy farms, 10 Korean native cattle farms) in Kyungbuk province from November 2000 to November 2001. The causative agent of dermatophytosis was identified by mycological examination. Antifungal susceptibility test of 26 isolates was performed by agar dilution method, using 5 antifungal drugs.
Prevalence of bovine dermatophytosis was found to be 13.5%(90/665) in dairy cattle farm and 14.5%(220/1,520) in Korean native cattle farm. The most common age at which this disease occurred was 2∼12 months. This disease usually occurred from winter to spring and the occurrence subsequently decreased in the summer. But 4 Korean native cattle farms with poorly hygienic status were occurred all the year round. The causative agent was identified as Trichophyton verrucosum exclusively in these case.
Antifungal susceptibility test of T. verrucosum(26 strains) was performed by agar dilution method, using 5 antifungal drugs including tolnaftate, griseofulvin, ketoconazole, amphotericin B and terbinafine. All isolates were highly sensitive to 5 antifungal drugs(geometric mean MICs 0.004∼0.032μg/ml). The isolates were the most sensitive to tolnaftate.
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