Occurrence of virulence-related sequences and phylogenetic analysis of commensal and pathogenic avian Escherichia coli strains (APEC) - Campos, Tatiana Amabile de; Lago, Juliana Carvalhães; Nakazato, Gerson; Stehling, Eliana Guedes; Brocchi, Marcelo; Castro, Antonio Fernando Pestana de; Silveira, Wanderley Dias da (Pesquisa Veterinária Brasileira, 2008)