Uropathogenic<i>Escherichia coli</i>Express Type 1 Fimbriae Only in Surface Adherent Populations Under Physiological Growth Conditions

Abstract

Our results demonstrate that T1F expression is strictly regulated under physiological growth conditions with increased expression during surface growth adaptation and infection of uroepithelial cells. This leads to separation of UPEC into low-expression planktonic populations and high-expression sessile populations.