Cross neutralizing antibodies in hamsters vaccinated with leptospiral bacterins with three serovars of serogroup Sejroe - Tabata, R.; Scanavini-Neto, H.; Zuanaze, M. A. F.; Oliveira, E. M. D.; Dias, Ricardo Augusto; Morais, Z. M.; Ito, Fumio Honma; Vasconcellos, Silvio Arruda (International Leptospirosis Society Scientific Meeting, 2002)