Summary
The virus of infectious bursal disease of chickens was studied by immune electron microscopy. Negatively-stained preparations revealed morphological similarities with both the bluetongue virus group, and the virus of infectious pancreatic necrosis of trout. Results indicated that the small particle found in such preparations is a degradation product of the large particle.
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Harkness, J.W., Alexander, D.J., Pattison, M. et al. Infectious bursal disease agent: Morphology by negative stain electron microscopy. Archives of Virology 48, 63–73 (1975). https://doi.org/10.1007/BF01320566
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DOI: https://doi.org/10.1007/BF01320566