Shimabukuro, Fábio Hiroto, Paulo Francisco Domingues, Hélio Langoni, Aristeu Vieira da Silva, Júlia Plombon Pinheiro, and Carlos Roberto Padovani. 2003. “Searching of Swine Leptospiral Carrier by Microbial Isolation and Polymerase Chain Reaction in Kidney Samples from Serologically Positive and Negative Animals”. Brazilian Journal of Veterinary Research and Animal Science 40 (4): 243-53.