Hepatitis B viruses

Hepatitis B viruses

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Credit: DR LINDA STANNARD, UCT/SCIENCE PHOTO LIBRARY

Caption: Hepatitis B viruses. Coloured transmission elect- ron micrograph (TEM) of hepatitis B viruses (large green circles), a cause of liver inflammation. The smaller circles and the rod-shaped objects are surplus viral coat (capsid) protein from infected liver cells. These non-infectious antigens (foreign proteins) are used to make vaccines against hepatitis B. The complete viruses are called Dane particles. Hepatitis B is transmitted by infected blood passed mainly through sexual intercourse or the sharing of needles by intraven- ous drug users. Symptoms include headache, fever, weakness and jaundice. Magnification unknown.

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Keywords: antigens, biology, capsid, coat protein, coloured tem, dane particles, disease causing, electron micrograph, hepatitis b, infectious, liver infection, many, microbiology, multiple, pathogenic, transmission, virion, virology, virus, viruses

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