THE GEORGE WASHINGTON UNIVERSITY
SCHOOL OF MEDICINE

1335 H STREET, WASHINGTON 38, O. C.

November 20, 1947

BACTERIOLOGY, HYGIENE
AND PREVENTIVE MEDICINE

Dr. Josnua lederherg
Department of Genetics
College of Agriculture
University of Wisconsin
Madison 6, Wisconsin

Dear Professor Lederberg:

About three weeks ago I received your letter
regarding coliform bacteria. I very sincerely regret that
due first to the war and later to the pressure of administrative
work, I have given up entirely all laboratory work and with it
has gone my detailed knowledge of the field in which I was work-
ing ten years ago. I very sincerely regret that I can not answer
your question relative to the availability ofatemperature-sensitive
strain of coliform bacteria. I do not believe I had this strain
in my collection. I regret, also, that my stock of reprints of
the review on "Coliform Bacteria" has been exhausted for some time.
I suggest you might write to Dr. Charles A. Stuart, Department of
Biology, Brown University, Providence, Rhode Island. Dr. Stuart
and his colleagues have done an immense amount of work in this field,
and he may be able to help you.

Very truly yours,
. any

Dr. Leland W. Parr
LP s AAH Professor of Bacteriology