Borrelia-like agents isolated at southeastern brazil: difficulties on the cultivation and serological identification - Mori, Claudia Madalena Cabrera; Bonoldi, V L N; Vasconcellos, Silvio Arruda; Battesti, Darci Moraes Barros; Yoshinari, Natalino Hajime; Schumaker, Teresinha Tizu Sato (World Congress on Laboratory Animal Science, 1996)