A family of filamentous viruses that infect Gram-negative bacteria with a genome of single-stranded DNA (MW 1.9–2.7 × 106). Coliphage fd, the type species of the fd phage group genus, adsorbs to the tips of pili of male enterobacteria and, after multiplication, particles are released without causing lysis of the host bacterium. [ino- + virus]
Medical dictionary. 2011.