Ebola virus. Transmission electron micrograph of a single Ebola virus, the cause of Ebola fever. It is one of the group of filoviruses, so-called for its thin and long shape. Here the viral filament is seen looping in on itself. A number of major outbreaks of this severe, frequently fatal viral haemorrhagic fever have occurred in equatorial Africa since 1976, one in Zaire in 1995. The virus appears similar to, but is antigenically distinct from the Marburg virus which causes green monkey disease. The illnesses from both Ebola and Marburg viruses are similar, with fever, diarrhoea, skin rash, and internal haemorrhage. Death may occur rapidly. Magnification: x80,000 at 8x12 inch size. This is the "reston" strain of Ebola, from Philadelphia, USA.
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