title: ColE1 plasmids potentiates the fitness of Salmonella Heidelberg in poultry litter
design: In this study, we performed a series of controlled laboratory experiments which assessed the evolution of two S. Heidelberg strains (SH-2813 and SH-116) in poultry litter previously used to raise 3 flocks of broiler chickens. Whole genome sequencing was performed on 86 isolates recovered after 0, 1, 7 and 14 days of evolution in poultry litter