Fimbriae of Escherichia coli K-12 strain AW405 and related bacteria

Abstract

Fimbriate strains of Escherichia coli K-12 of the AW405 series agglutinated erythrocytes of several animal species. The hemagglutination was mannose senstivie, and the fimbriae were type 1. When cultured for extended periods in static broths, they did not form fimbrial pellicles but formed thick, nonfimbrial pellicles, the appearance of which was not associated with the selective outgrowth of fimbriate-phase bacteria.