Brazilian Journal of Veterinary Research and Animal Science; Vol. 45 (2008): Suplemento; 82-87 Brazilian Journal of Veterinary Research and Animal Science; v. 45 (2008): Suplemento; 82-87 Brazilian Journal of Veterinary Research and Animal Science; V. 45 (2008): Suplemento; 82-87 Brazilian Journal of Veterinary Research and Animal Science Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) instacron:USP