Properties of a Filamentous Phage which Adsorbs to Pili Coded by Plasmids of the IncI Complex

Abstract
A filamentous phage, PR64FS, which adsorbs to tips of I pili [of Escherichia coli] was isolated. PR64FS is shorter than the I pilus-adsorbing phage If1 and differs from it in plaque morphology. Phages PR64FS and If1 are serologically related and, like the latter, PR64FS adsorbs to pili coded by all Inc groups of the I plasmid complex.