AN ELECTRON MICROSCOPIC COMPARISON OF BOVINE INFECTIOUS PUSTULAR VULVOVAGINITIS VIRUS AND INFECTIOUS BOVINE RHINOTRACHEITIS VIRUS IN TISSUE CULTURE

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Abstract
An electron microscopic study of IPV and IBR viruses isolated from cattle in Canada is presented. A technique is described with which it is possible to observe the cytopathic changes occurring in the same area of a monolayer, of bovine foetal kidney cells, infected with IPV or IBR virus, with both the phase contrast and electron microscopes. The morphology of these viruses was found to be identical and no difference was observed in their intracellular development.