According to the receptor specificity of the PapG adhesin, p-fimbriated uropathogenic E. coli is clinically divided into two subtypes: papG allele II+ strains associated with pyelonephritis and bacteremia, and papG allele III+ strains associated with cystitis but have been found in pyelonephritis and bacteremia [2, 5–7]. Here, PAPOLG is linked to pyelonephritis.