1. Department of Microbiology and Parasitology, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
2. Laboratory of Oral Microbiology Research, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
3. Department of Food Science and Technology, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul State, Brazil
4. Laboratory of Experimental and Applied Immunobiology, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil