[1] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, Dept Anal Clin Toxicol & Bromatol, Ribeirao Preto, SP, Brazil
[2] US FDA, Div Microbiol, Off Regular Sci, Ctr Food Safety & Appl Nutr, College Pk, MD 20740 USA
[3] Embrapa Suinos & Aves, Concordia, SC, Brazil