1Departament of Microbiology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), caixa postal 486, Belo Horizonte, MG 31270-901, Brasil, E-mail: viviane.c@hotmail.com
2Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais (UFMG), caixa postal 486, Belo Horizonte, MG 31270-901, Brasil, E-mail: viviane.c@hotmail.com
3Laboratory of Radiobiology, Center of Nuclear Technology Development (CTDN), caixa postal 941, Belo Horizonte, MG 30123-970, Brasil, E-mail: viviane.c@hotmail.com
4Department of Veterinary Clinic and Surgery, Veterinary School, Federal University of Minas Gerais (UFMG), caixa postal 486, Belo Horizonte, MG 31270-901, Brasil, E-mail: viviane.c@hotmail.com