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This digitally-colorized scanning electron microscopic (SEM) image depicted 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.
High Resolution: Click here for hi-resolution image (2.73 MB)
Content Providers(s):CDC/ Dr. Stan Erlandsen
Creation Date:1999
Photo Credit:Dr. Stan Erlandsen
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.