Published online by Cambridge University Press: 06 April 2009
Two attempts to transfer immunity against N. muris to rats using the lymph node and spleen cells from actively immunized donors were unsuccessful. Experiments showed that the rats were sufficiently inbred, that the transfer technique was satisfactory, and that the donors were adequately immunized. The rats' competence as donors for adoptive transfer was demonstrated with sheep red cells as antigen. The adoptive transfer of immunity against sheep red cells was successful in recipients whose donors had sheep red cells only and no N. muris. There was no detectable transfer of immunity against N. muris or sheep red cells to recipients whose donors had received both.
We are very grateful to Miss Kathleen O'Brien for technical assistance, to Professor P. B. Medawar, F.R.S., for his help and advice and to Dr E. J. Delorme for showing us Professor M. F. A. Woodruff's skin-grafting technique.