A survey on the distribution of antibody against Leptospira among house dogs was conducted in a metropolitan area of Tokyo which had been supp osed to be relatively thickly contaminated with leptospires and in which the authors have been practicing.
The results indicated that 35. 1 per cent of the apparently healthy dogs examined was involved in latent infection with Leptospira. This percentage was a little lower than that reported by Yamamoto (1940). It cannot be overlooked, however, that such a high rate of inapparent infection was de monstrated among house dogs. Mixed infection with Leptospira icterohaemorrhagiae and L. can icola was proved in 40.0 per cent of the antibody positive dogs.
Antibody detection was carried out on dog sera by the Schuffner-Mochtar test.
