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Description:This photomicrograph depicts the egg of a rat tapeworm, Hymenolepis diminuta, during its diagnostic stage. H. diminuta is a cestode frequently found in rodents, and infrequently seen in humans. See PHIL 3395 for a diagrammatic representation of this tapeworm’s lifecycle.
Eggs of Hymenolepis diminuta are passed out in the feces of the infected definitive host (rodents, humans). The mature eggs are ingested by an intermediate host (various arthropod adults or larvae), and oncospheres are released from the eggs and penetrate the intestinal wall of the host, which develop into cysticercoid larvae.
High Resolution: Click here for hi-resolution image (17.62 MB)
Content Providers(s):CDC/ Dr. George Healy
Creation Date:1967
Photo Credit:
Links:CDC - Div. of Parasitic Disease, DPDx; Hymenolepiasis
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.