Virus of Foot - and - Mouth Disease

In the first 1 of this series of papers we described the strain of footand-mouth disease virus employed in our studies. We have also reported therein that guinea pigs were susceptible to the active agent in dilutions of 1: 10,000,000, and that the virus was non-centrifugable. The indications pointed to a minute size of the incitant. In the experiments to be presented in this article on cataphoresis and filtration, the findings regarding the minuteness of the incitant are confirmed and, furthermore, a relative delimitation of its size will be demonstrated. In addition, the electric charge carried by the virus will be revealed and phenomena dependent on the charge and on certain filtration reactions will be discussed.