| Literature DB >> 19869966 |
V Ross1.
Abstract
1. Considerable variation in the resistance of different rats toward Type II pneumococcus has been demonstrated. In general, older rats survive much greater doses than young ones, illustrating the acquisition of a natural partial immunity. The same is true for Type III but the immunity appears somewhat later in life and does not reach the same height. 2. An active immunity can be created against Types II and III in rats by feeding the dead organisms or the Berkefeld filtrate of the bile salt-dissolved cells. This immunity resembles that obtained against Type I in several respects.Entities:
Year: 1931 PMID: 19869966 PMCID: PMC2180298 DOI: 10.1084/jem.54.6.875
Source DB: PubMed Journal: J Exp Med ISSN: 0022-1007 Impact factor: 14.307