The Journal of Experimental Medicine, Vol 89, 369-393,
Copyright, 1949, by The Rockefeller Institute for Medical Research New York
IMMOBILIZATION OF TREPONEMA PALLIDUM IN VITRO BY ANTIBODY PRODUCED IN SYPHILITIC INFECTION
Robert A. Nelson Jr. M.D.1,
Manfred M. Mayer Ph.D.1, and
With the Assistance of Judith A. Diesendruck, Sc.D., and John T. Eagan
1 From the Department of Bacteriology of The Johns Hopkins School of Hygiene and Public Health, Baltimore
Treponema pallida were extracted from rabbit testicular syphilomas and suspended in a special medium in which the organisms remain motile and infectious for several days. On incubation of such suspensions with syphilitic rabbit or human sera and guinea pig complement, the treponemes became non-motile and lost their capacity to infect rabbits. Various factors affecting this immobilization have been investigated.
In a preliminary survey of individual sera, immobilizing antibody could be detected in the majority of sera from syphilitic animals and human beings, but was absent in almost all the normal sera examined.
It could be demonstrated that the immobilizing and reagin activities of syphilis sera are due to separate antibodies.
Submitted on October 25, 1948