A Bacteriophage Specific for F—Salmonella Strains

See allHide authors and affiliations

Science  30 Jun 1961:
Vol. 133, Issue 3470, pp. 2069-2070
DOI: 10.1126/science.133.3470.2069


A bacteriophage is described which grows on recipient (F-) and not on donor ( Hfr, F+, or F') salmonella. The reason for this differential is unknown, since the phage attaches to all mating types, but progeny ensue only from female bacteria. Purification of this phage has been accomplished. A procedure is described for quantitatively determining either the acquisition or loss of the F agent by bacteria.