NIBSC / SCIENCE PHOTO LIBRARY NIBSC / SCIENCE PHOTO LIBRARY
AIDS virus. Transmission electron micrograph (TEM) of a T-lymphocyte blood cell infected with Human Immunodeficiency virus (HIV), the causative agent of AIDS. At top, spherical virus particles are seen on the surface of the T-cell. Darker regions inside the cell (at centre) are chromosomes. HIV instructs the cell to reproduce more viruses which bud away from the cell membrane, to reinfect other T-cells. By this process of viral budding the T- cell of the blood immune system dies. Depletion of the number of T-cells in the blood is the main reason for the destruction of a person's immune system in the disease of AIDS. Magnification: x19,000 at 8x10 inch size.
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