CNRI / SCIENCE PHOTO LIBRARY CNRI / SCIENCE PHOTO LIBRARY
False-colour transmission electron micrograph of Hepatitis B virus particles - the small pink spheres & tubules. The virus causes serum hepatitis, an acute inflammation of the liver. The virus appears in 3 structural forms: spheres 20 nanometres (nm) in diameter, tubules of similar diameter but variable length, & Dane particle spheres 40nm in diameter. Serum hepatitis is transmitted by infected blood. Symptoms develop after an incubation period of 1-6 months & include: headaches, fever, & jaundice. Diagnosis is confirmed by presence of Australia antigen in blood. Magnification: x29,400 at 35mm size.
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