Beye 7 RE ss a oe Um UE cn Ee PS

Mareh 10, 1949.

Dr. A. J. veil,
Bronx 66, ee

My deat Dr. iieil,

Thank you for your asolicitcus letter. I am serry to hear that roa
wi not be able to continue your very interesting work.

a: came to this department to-organize a program of ressareh in
miorobial penotics » and after the usual prelininary delays, we sre now
in a favorable position to expand our work. I wiil be glad to send you
our publications us they appear. | .

lately, I have started to work on the problem of induced lysogentoity,

which is incredibly comnon not omly in staphylococci but in enteric
bacteria. The tranafer of phage to a symbiotic ralationship in a suitable
host is rather analogous to type transformation, and I have a suspieion
| may be very cloealy connected with it, especially in enterobacterfa. At
some later date, I hope to be able to look iato your report on Shigella
frou this standpoint. Unfortunately, I have lost the strains which you
sent me. If there is any danger that they could not be gotten at some
future tims, I wonder if you could put me on their track. |

Yours very sincerely,

Joshua Lederberg,
Assistant Professor of Genetics

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