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Escherichia coli virulence factors: Adhesins

Bacterial structure			Cellular receptor
Adhesin	Pilin (fimbria)	Operon	Biochemical nature	Hemagglutination
PAP G	P fimbriae	pap	Alpha-D-gal-(1-4)-beta-D-gal	Human P blood group
SFA	S fimbriae	sfa	Alpha-sialyl-(2-3)-beta-gal	Human and bovine erythrocytes
AFA	Not associated with fimbriae	afa	Decay accelerating factor + unknown	Human erythrocytes

Characteristics of different adhesins expressed by strains of Escherichia coli that are uropathogenic.

Adapted from: Archambaud M, Courcoux P, Labigne-Roussel A, Ann Inst Pasteur/Microbiol 1988; 139:575, and from Le Bouguenec C, Lalioui L, du Merle L et al. Characterization of AfAE adhesins produced by extraintestinal and intestinal human Escherichia coli isolates: PCR assays for detection of Afa adhesins that do or do not recognize Dr blood group antigens. J Clin Microbiol 2001; 39:1738.

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