Table 1.

Adhesive properties of isogenic E. coli strains KB91 and KB96 expressing M₁L and M₁H FimH variants, respectively

E. coli strain	FimH variant	M1:M3 ratio	Yeast cell agglutination†	Guinea pig RBC agglutination†	Buccal cell binding‡	Uroplaque binding§
KB91	M1L	0.08	16	2	185  ± 15	0.26  ± 0.05
KB96	M1H	0.63	16	16	194  ± 12	3.35  ± 0.15

Binding in all of these assays was inhibited more than 95% by 1% α-methyl-d-mannopyranoside. 

^*Functionally, strains KB91 and KB96 are completely representative of other M₁L and M₁H phenotype strains. 

^†Last dilution causing agglutination. 

^‡Buccal epithelial cells bound per well, mean ± standard error of mean. 

^§E. coli bound (cfu per well × 10⁶), mean ± standard error of mean.