CENTERS FOR DISEASE CONTROL AND PREVENTION / SCIENCE PHOTO LIBRARY CENTERS FOR DISEASE CONTROL AND PREVENTION / SCIENCE PHOTO LIBRARY
Colour-enhanced Scanning Electron Micrograph (SEM) showing some of the ultrastructural morphologic details of an oblong-shaped Giardia sp. protozoan cyst, revealing the filamentous nature of the cyst wall. Each cyst-wall filament is approximately 7 to 20 nanometers (nm) thick. Note that this cyst was undergoing excystation, and was captured at a point in the process where a flagellated trophozoite was beginning to emerge from the right side of the cyst.
Model release not required. Property release not required.