Longitudinal Study Detects the Co-Carriage of ESBL and - and - Genes in Strains in a Portuguese Farrow-to-Finish Swine Herd.

Cephalosporins and polymyxins are employed in antimicrobial protocols to control and treat neonatal infections and post-weaning diarrhoea in swine operations. We conducted a longitudinal study to evaluate the colonization and transmission of antibiotic-resistant in sows and their piglets in a farrow-to-finish operation, focusing on characterization of Extended Spectrum Beta-Lactamase (ESBL) and genes, virulence traits and genetic relatedness. A total of 293 isolates were obtained from faecal samples collected in five time points.