Immunity to Pneumococcus Produced in Rats by Feeding Tissues of Animals Killed by the Same Organism

[摘要] 1. 1. Rats fed on tissues of animals killed by pneumococcus Type I show an increased resistance to intraperitoneal injections of the same germ.2. 2. The protection seems to be type specific.3. 3. Protective substances exist in the sera of the immunized animals.4. 4. Reference is made to the very favorable immunization created by feeding pneumococci.5. 5. An explanation is suggested for the fact that those types of pneumococci most commonly found in normal mouths are the cause of a minority of actual cases of lobar pneumonia.

[学科分类] 生物科学（综合）