Interbacterial Transfer of R Factor in the Human Intestine: In-Vivo Acquisition of R-Factor-mediated Kanamycin Resistance by a Multiresistant Strain of Shigella sonnei

W. Edmund Farrar, Jr., Margene Eidson, Patricia Guerry, Stanley Falkow, Lewis M. Drusin, and Richard B. Roberts From the Departments of Medicine and Preventive Medicine, Emory University School of Medicine, Atlanta, Georgia; the Department of Microbiology, Georgetown University School of Medicine, Washington, D.C.; the Departments of Public Health and Medicine, Cornell University Medical College, New York, New York; and the Department of Medicine, Medical University of South Carolina, Charleston, South Carolina