P. Goluszko et al., Dr operon-associated invasiveness of Escherichia coli from pregnant patients with pyelonephritis, INFEC IMMUN, 69(7), 2001, pp. 4678-4680
We used a gentamicin protection assay to assess the ability of gestational
pyelonephritis isolates of Escherichia call to invade HeLa cells. The abili
ty to enter HeLa cells was strongly associated with the presence of Dr oper
ons coding for Dr adhesins, In contrast, the nonivasive isolates predominan
tly expressed papG, coding for P fimbriae.