Brazilian Journal of Veterinary Research and Animal Science; Vol. 43 (2006): Suplemento; 50-58 Brazilian Journal of Veterinary Research and Animal Science; v. 43 (2006): Suplemento; 50-58 Brazilian Journal of Veterinary Research and Animal Science; V. 43 (2006): Suplemento; 50-58 Brazilian Journal of Veterinary Research and Animal Science Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo (FMVZ-USP) instacron:USP Brazilian Journal of Veterinary Research and Animal Science, Vol 43, Iss supl. (2006)