Multilocus microsatellite typing (MLMT) was performed on 93 strains of Microsporum canis isolated between 2012 and 2017 from 75 cats, eight dogs and 10 pet owners. These strains were derived from two major reservoirs: commercial breeding facilities and pet shops (PS), and stray cats and pet cats that went outdoors and came in contact with stray cats (Outdoor). Six microsatellite markers were used for genotyping. These 93 strains included 22 genotypes, 11 previously detected in Japan and 11 new genotypes. Strains belonging to the previously reported genotypes P and A were distributed widely throughout Japan. Genotype P was the most frequent, accounting for 37 (39.8%) of the 93 strains, most derived from Outdoor sources. Genotype A was the second most frequent, being present in 11 (11.8%) of the 93 strains, most derived from the PS reservoir. All new genotypes were detected in isolates from cats, with many of these derived from the Outdoor reservoir. The consistency of infection was shown in 18 of 19 familial cases. These findings indicate that genotypes differ in strains derived from PS and Outdoor reservoirs and that genotyping by MLMT is useful for tracking the routes of spread and transmission of M. canis in Japan.

对 93 株犬小孢子菌进行多位点微卫星分型 (MLMT)2012 年至 2017 年间，从 75 只猫、8 只狗和 10 名宠物主人中分离出来。这些菌株来自两个主要的宿主：商业养殖设施和宠物商店（PS），以及到户外并与流浪猫接触的流浪猫和宠物猫（户外）。六个微卫星标记用于基因分型。这 93 个菌株包括 22 个基因型，其中 11 个是以前在日本发现的，11 个是新的基因型。属于先前报道的基因型 P 和 A 的菌株在日本广泛分布。基因型 P 是最常见的，占 93 株中的 37 株（39.8%），大部分来自室外来源。基因型 A 是第二常见的，存在于 93 个菌株中的 11 个（11.8%）中，大多数来自 PS 水库。在猫的分离物中检测到所有新的基因型，其中许多来自户外水库。19 例家族性病例中有 18 例显示出感染的一致性。这些发现表明，来自 PS 和室外水库的菌株的基因型不同，MLMT 的基因分型可用于追踪病毒的传播和传播途径。日本的犬分枝杆菌。