Abstract
Affinity of the rickettsiae to tissue cells, especially the relation between rickettsiae and host cells has been studied.
Rickettsiae infected tissues of embryonated chicken eggs were cultivated, and observations were made on the growth cells. On the other hand, normal tissues of the same kinds were cultivated side to the infected tissues, and susceptibility of each tissue to the infection was examined
Epithelial cells were found to be more susceptible to the infection than fribroblasts.
