Positive PCR for Leptospira spp. in a sow from a German herd presenting animals with mat titres for Leptospira interrogans serovar Bratislava - Schönberg, A.; Ortmann, G.; Reetz, J.; Luge, E.; Richtzenhain, Leonardo José; Cortez, Adriana; Vasconcellos, Silvio Arruda; Brem, S. (Arquivos do Instituto Biológico, 2005)