[Restriction endonuclease analysis of leptospiral DNA from different serogroup and serovar]

The DNAs of different serogroups and serovars of leptospires were analyzed with seven kinds of restriction endonuclease (Bam HI, Bgl II, Cfo I, Eco RI, Hind III, Kpn I and Pst I). The results showed that there are significant differences among the leptospiral DNAs of different serovars, especially in the high molecular-weight region, but the patterns of different strains belonging to the same serovar are similar. In addition, Cfo I and Eco RI are more effective for differentiating leptospires.