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J Virol. 1974 October; 14(4): 957-964
Copyright © 1974 American Society for Microbiology. All Rights Reserved.

Structure of Infectious Bursal Disease Virus

Department of Veterinary Microbiology, Faculty of Agriculture, Gifu University, Gifu, Japan

ABSTRACT

Infectious bursal disease virus of chickens was purified, and its structure was examined by the negative-staining technique in the electron microscope. The buoyant density of infectious bursal disease virus in CsCl was found to be 1.34 g/cm³. The morphological details suggest that the capsid of the virion consists of a single layer of 32 capsomeres arranged in 5:3:2 symmetry. The virion measured about 55 nm in diameter and had no envelope.

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