Effect of Microbial Antigens on Irradiation Mortality in Mice.

Abstract
Mortality is reduced by approximately 50% in mice injected with zymosan (1000 γ) or with thermostable antigens from Proteus morganii, Klebsiella pneumoniae, or Escherichia coli. Soluble antigens from Gram-positive organisms, however, are ineffective. The greatest reduction of mortality is obtained by means of a Typhoid-Paratyphoid vaccine.