the immune response of random-bred mice to infection with a relatively avirulent strain of plasmodium yoelii was measured in terms of parasitemia , splenomegaly , immediate and delayed hypersensitivity to a p. yoelii antigen preparation , resistance to challenge with a virulent variant of p. yoelii , and nonspecific resistance to l. monocytogenes .
C0301872
immune response
C0003320
antigen