1. Department of Microbiology and Parasitology; Universidade Federal de Santa Maria; Santa Maria Rio Grande do Sul Brazil
2. Department of Physiology and Pharmacology; Universidade Federal de Santa Maria; Santa Maria Rio Grande do Sul Brazil
3. Department of Biochemistry and Molecular Biology; Universidade Federal de Santa Maria (UFSM); Santa Maria Rio Grande do Sul Brazil
4. Laboratory of Molecular Biology; Centro Universitário Franciscano; Santa Maria Rio Grande do Sul Brazil