Distribution of the stx1 and stx2 genes in Escherichia coli isolated from milk cattle according to season, age, and production scale in southwestern region of Goiás, Brazil

by M.R.A. Ferreira, A.E. Stella, E.G. Freitas-Filho, T.S. Silva, K.A. Nascimento, J.F.N. Pinto, M. Dias, C.N. Moreira