STRITCH SCHOOL OF MEDICINE

of i
LOYOLA UNIVERSITY
706 South Wolcott Avenue
Chicago 12, Illinois

Thursday aug. 21, 1952
Dr. Bruce Stocker
Dept. of Microbiology
New York University
77 lst Ave., New York, N.Y.
ity dear doctor Stocker:

I transferred your cultures the afternoon
you left me to broth made up of 0.5% tryptose, 0.2% yeast extract
at pH 7.1, incubated at room temp. till next morning. To each tube
was added 5% formalin, organisms washed by centrifugation and stained,
The slides are being shipped in a separate package.

All broth cultures appeared smooth except
SW 592 which was settled out and is probably a rough variant. My

observations are as follows:

SW541 - no def. noverent in broth, no stainable flagella
SwSLh - ? &

Swo55-" * nosy flagella present, normal curvature
S656 - " " " " n-

Sw 653 - motile, mainly wiggling ’ " 7 tt tf

Sw 65 - " " tt tt it

SW 592 = normal motion " " " r

SW 593 - normal or al.wiggly motion, " i " "

The lack of swarming of 592 is perhaps
due to its being "rough". None of the strains have "curly" flagella.
For comparison I am sending you a slide of Sal wichita showing
mainly curly flagella with a few normals.
Hope you are well and have a pleasant
trip home to England.

Copy for Dr. Lederberg.