GERD GUENTHER / SCIENCE PHOTO LIBRARY GERD GUENTHER / SCIENCE PHOTO LIBRARY
Trichodina parasite. Differential interference contrast micrograph of Trichodina pediculus. This ciliate parasite lives on the skin, gills and mucous membranes of many aquatic animals. It adversely affects respiratory and ionic exchange at the gills by stimulating mucous production. Magnification: x200 when printed at 10 centimetres wide.
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