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Description:This photomicrograph depicts a close view of the head region of an infective, third-staged filariform larvae (L3) of a parasitic Strongyloides stercoralis nematode.
L3 larvae are found in soil, and invade the human host by direct penetration of the skin. They may be found in respiratory specimens during cases of autoinfection. The strongyloides nematode has a more complex life cycle than that of most nematodes with its alternation between free-living and parasitic cycles, and its potential for autoinfection and multiplication within the host.
High Resolution: Click here for hi-resolution image (17.88 MB)
Content Providers(s):CDC/ Dr. George R. Healy
Creation Date:1967
Photo Credit:
Links:CDC – Div. of Parasitic Disease, DPDx; Strongyloidiasis
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.