Rift Valley fever virus particles, computer illustration. This virus particle consists of an RNA (ribonucleic acid) genome enclosed in a protein capsid, which is itself surrounded by a glycoprotein envelope. Rift Valley fever occurs in Africa, infecting humans, cattle, sheep, rodents and other species. It is transmitted by insects, mainly mosquitoes, and causes chills, fever, a headache and joint and muscle pain. It is rarely fatal, but can cause retinal haemorrhages that may lead to visual impairment. | |
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Crédit: | Science Photo Library / Kon, Kateryna |
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