KATERYNA KON / SCIENCE PHOTO LIBRARY KATERYNA KON / SCIENCE PHOTO LIBRARY
Bluetongue virus particle. Computer illustration of the core particle of the bluetongue virus (BTV), with proteins represented by coloured blobs. The particle measures about 70 nanometres in diameter. BTV causes bluetongue disease, a disease of sheep and (more rarely) other ruminants such as cattle and deer. It is named for the swollen blue tongue it causes in affected animals. It is spread by midges.
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