she STANFORD UNIVERSITY MEDICAL CENTER iy STANFORD, CALIFORNIA 94305 August 16, 1974 Stanrosp UNIVERSITY SCHOOL OF MEDICINE Department of Genetics (415) 497-5052 Dr. Frits Orskov WHO International Escherichia Centre Statens Seruminstitut Amager Boulevard 80 Copenhagen, S. Denmark Dear Frits, Can you recall any discussion either (1) by anyone in print, or (2) in correspondence among us that contrasts the policies of naming serotypes of a. Salmonella with binomial epithels b. Escherichia with coded antigenic formulas, Somewhere I thought I had seen or written that (a) had the advantage of encouraging investigators to publish every new combination, at least when first encountered, so that the literature is more complete, Besides possible references, would you tell me your views. Is this latter point correct? And if so, is it a particular advantage; or does it just clutter up the literature? Sincerely yours, ey Joshua Lederberg Professor of Genetics JL/rr ad LT. J. P. KENNEDY, JR. LARORATORIES FOR MOLECULAR MEDICINE, DEDICATED TO RESEARCH IN MENTAL RETARDATION MOLECULAR BIOLOGY HEREDITY NEUROBIOLOGY DEVELOPMENTAL MEDICINE