Ocurrence of Listeria monocytogenes in Brazilian swine herds - Paixão, Renata; Moreno, Andrea Micke; Cavalcante, D. A; Doto, Daniela Sabatini; Gobbi, D. D. S; Campos, Daniel de Freitas Souza; Castilla, Karina Salvagni; Ferreira, Antonio José Piantino (International Symposium on the Epidemiology & Control of Foodborne Pathogens in Pork, 2005)