Abstract
Viruses recovered from intestinal preparations of both bluecomb-infected and control (uninoculated) turkey poults had a density of 1.16-1.17 g/cm3. Electron-microscope studies of both preparations revealed virus particles which were spherical to pleomorphic and possessed flexible envelopes with numerous radial spikes. These particles resembled the myxoor paramyxoor the oncornaviruses (membrane viruses) in morphology. Particle diameter ranged from 55 to 220 nm. In addition, bluecomb-infected preparations contained virus particles 135 nm in diameter with characteristic petalshaped surface projections which made them indistinguishable from known coronaviruses. No such particles were seen in the control preparations. It is speculated that a coronavirus might be associated with the bluecomb disease process and that the membrane viruses recovered from both bluecomb and control intestinal preparations might not be involved in the bluecomb disease process.
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