V. On the effect upon virulence of passage of B. pestis through rats by cutaneous inoculation without intermediate culture

Abstract

In the preceding paper we have put forward the result of some experiments in which B. pestis was passed through a series of 26 rats by means of the subcutaneous method and without the intervention of any culture on artificial media. From this series of experiments it appeared that the virulence of the organism was not affected by passage through the ordinary rats of Bombay.