STATENS SERUMINSTITUT
Kebenhavn, S.

d.18.10.46

Dr.J.Lederberg,
Yale University,
Osborn Botanical Laboratory,
NEW HAVEN, Conn.
S.A.

Dear Dr.Lederberg:

I am in receipt of your letter of 28th September
and have pleasure in sending to you the following"ammon-

weak" Salmonella cultures:

76 8-paratyphi A

7758 7 A var.durazzo
2%s.typhi 2 (typhoid)

278  " Watson (typhoid)

§S.sendai .
§/S.blegdam "ammon-weak"
§lg. * “ammon-strong" strain

Variations of the saame

I did not store other different isolations of the
same serological type. Please be very careful in working
with these cultures as they are dealing with high pathogenic

strains.

With best regards,
sincerely Yours,

- Koyo _

Dr.¥F Kauffmann