Antibiotic resistance and heavy metal tolerance plasmids: the antimicrobial bulletproof properties of Escherichia fergusonii isolated from poultry Renata Galetti,1 Rafael Antonio Casarin Penha Filho,2 Joseane Cristina Ferreira,1 Alessandro M Varani,2 Ana Lúcia Costa Darini11Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil; 2Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Jaboticabal, BrazilAbstract: We describe the mobilome of Escherichia fergusonii 40A isolated from poultry, consisting of four different plasmids, p46_40A (IncX1, 45,869 bp), p80_40A (non-typable, 79,635 bp), p150_40A (IncI1-ST1, 148,340 bp) and p280_40A (IncHI2A-ST2, 279,537 bp). The mobilome-40A carries a blend of several different resistance and virulence genes, heavy metal tolerance operons and conjugation system. This mobilome 40A is a perfect tool to preserve and disseminate antimicrobial resistance and makes the bacterial isolate incredibly adapted to survive under constant antimicrobial pressure.Keywords: plasmids, antibiotic resistance, heavy metal tolerance, poultry