U.S. Department of Agriculture: Agricultural Research Service, Lincoln, Nebraska


Date of this Version



INFECTION AND IMMUNITY, 72(10): Oct. 2004, p. 6168–6171


The contribution of long polar fimbriae to intestinal colonization by Escherichia coli O157:H7 was evaluated in sheep, conventional pigs, and gnotobiotic piglets. E. coli O157:H7 strains with lpfA1 and lpfA2 mutated were recovered in significantly lower numbers and caused fewer attachment and effacement lesions than the parent strain.