LUFTPOST
PAR AVION

 

STATENS SERUMINSTITUT

TELEFON: CENTRAL 2835

 

TELEGRAM ADRESSE: STATSSERUM

POSTGIRO: 2817

March 31°", 1952,

Dr. J. Lederberg
Department of Genetics
University of Wisconsin
College of Agriculture
Madison 6, Wisconsin
u.S.A.

Dear Dr. Lederberg:

Thank you very much for your letter of
March y2th and the 2 reprints. It is very
interesting and important that you could
isolate a typhoid strain with i antigen,
please receive my best congratulations.

I am sending to you all the pure O

+

forms I have:

Nr. zB = S.typhi murium 3173

Nr. 58 = §.typhi 0 902

Nr. 223 = S.typhi murium var.copenhagen 1810
Nr. 245 = S.paratyphi B ‘) 19.

I am sorry I do not know who has the
typhoid phages of Rakieten,

With kind regards
yours sincerely

Plerfprrer__

F Kauffmann

Nr.