Parasitic protozoa on intestinal surface. Coloured transmission electron micrograph (TEM) of several meront stages of Cryptosporidium sp. protozoan parasites (round) on an intestinal surface. The surface is covered in microvilli strands. Meronts feed through the yellow structures attaching them to the surface. The meront stage of the life cycle involves asexual reproduction to form merozoites (blue). When released, the merozoites may repeat asexual reproduction, or may reproduce sexually to form the oocyst stage that passes between hosts in infected faeces. This parasite causes diarrhoea. Magnification x8300 when printed 10cm high.
About the Artist - London School Of Hygiene & Tropical Medicine
Science Photo Library was founded in 1981 by Michael Marten, one of the authors of "Worlds Within Worlds", a book exploring different ways to observe the universe - from electron micrographs, to images of earthrise taken from the Apollo spacecraft. When Marten started receiving requests for the beautiful images in the book, he had an idea of setting up Science Photo Library.
Since then, Science Photo Library has continued to work alongside world acclaimed photographers and the leading science and medical experts to provide a central source of the best science and specialist imagery available. Although the collection started with scientific images, it has grown to encompass all aspects of science and their impact on everyday life.
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