O. SCHWARTZ, M. SOURISSEAU, MC. PREVOST, INSTITUTE PASTEUR / SCIENCE PHOTO LIBRARY O. SCHWARTZ, M. SOURISSEAU, MC. PREVOST, INSTITUTE PASTEUR / SCIENCE PHOTO LIBRARY
Chikungunya virus. Coloured transmission electron micrograph (TEM) of chikungunya viruses (red) infecting a cell. This alphavirus is composed of an RNA (ribonucleic acid) genome enclosed in a protein coat, or nucleocapsid, which is itself surrounded by a lipoprotein envelope. The virus, which is transmitted by mosquitoes, causes a rare form of viral fever. Symptoms include a high fever, rash and arthritic joint pain. Magnification: x 94,000 when printed at 10 centimetres wide.
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