RT Journal Article SR Electronic(1) A1 Kakita, Tetsuya A1 Kyan, Hisako A1 Miyahira, Masato A1 Takara, Taketoshi A1 Nakama, Eri A1 Kuba, Yumani A1 Kato, Takashi A1 Nidaira, Minoru A1 Kudaka, Jun A1 Koizumi, NobuoYR 2020 T1 Novel genotypes of Leptospira interrogans serogroup Sejroe isolated from human patients in Okinawa Prefecture, Japan JF Journal of Medical Microbiology, VO 69 IS 4 SP 587 OP 590 DO https://doi.org/10.1099/jmm.0.001169 PB Microbiology Society, SN 1473-5644, AB Leptospirosis is a zoonotic disease caused by pathogenic spirochetes of Leptospira species. It is a public health issue in the tropics, including Okinawa, the southernmost prefecture of Japan. This study reports the first isolation of L. interrogans serogroup Sejroe from two human patients in Japan, and describes its molecular characterization using multilocus sequence typing (MLST) and multiple-locus variable-number tandem repeat analysis (MLVA). MLST on the two isolates, 168036 and 178129, showed that pfkB in 178129 is a novel allele, and that both isolates constitute novel sequence types (STs); ST286 for 168036 and ST287 for 178129. A minimum spanning tree based on seven alleles of L. interrogans indicates that both isolates are genetically close, but are distinct from known L. interrogans serogroup Sejroe strains. MLVA using 11 loci demonstrated that seven of the 11 loci were identical between the two isolates, whereas the identity between the isolates and the seven reference strains of L. interrogans serogroup Sejroe was zero to three loci. These results indicate that the isolates investigated in this study have novel genotypes, and are genetically closest to each other among the known L. interrogans serogroup Sejroe strains., UL https://www.microbiologyresearch.org/content/journal/jmm/10.1099/jmm.0.001169