ELECTRON MICROSCOPIC INVESTIGATIONS ON THE VIRUS OF STOMATITIS PAPULOSA (ELECTRONENMIKROSKOPISCHE UNTERSUCHUNGEN AM VIRUS DER STOMATITIS PAPULOSA)
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
The included bodies, demonstrated in the case of bovine Stomatitis papulosa were examined in the electron microscope in ultra-thin sections. The material of which they mainly consist is loose and foamlike and contains focal consolidations. Included within this foamlike material, round particles are found with a dense interior body, a surrounding membrane and a less dense layer, filling the interspace. These particles have a diameter of about 207 mu. The existence of incomplete particles of this kind offers the conclusion due to their special form and situation, that they are a build from material of the included bodies. It is presumed that these particles are virus particles. Other ovular particles, which are approximately 215 millimicrons long and 105 millimicrons wide, are considered as virus particles in a different stage of development. They are not bedded into the material of the included bodies, but lie freely in great numbers in its hollow space, on its outer margin, within the intercellular gaps and single ones also within the cytoplasm. These particles were also found in steamed dab-preparations. Contrary to the virus of canary- small pox, which is of square structure when demonstrated according to this method, these particles kept their ovular form. The virus of Stomatitis papulosa, therefore, must not be counted among the square types of virus.
- Animal Husbandry and Veterinary Medicine