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ID#:8556
Description:This historic 1942 photomicrograph revealed some of the morphologic details displayed by a schistosomal cercaria, which is the the larval stage of a parasite that causes “swimmer’s itch”, and was magnified approximately 150x.
This was one of a series of instructional images used by the Minnesota Board of Health to train its state public health workers. The purpose of the images and the accompanying training was focused on protecting potable water supplies from contaminants including toxins, and pathogenic organisms, such as the parasite pictured here. This material was obtained from Professor William A. Riley, of the University of Minnesota. The sample itself was taken from Lake Owasso, Minnesota.
High Resolution: Click here for hi-resolution image (9.53 MB)
Content Providers(s):CDC/ Minnesota Department of Health, R.N. Barr Library; Librarians Melissa Rethlefsen and Marie Jones, Prof. William A. Riley
Creation Date:1942
Photo Credit:
Links:Minnesota Health Department
Minnesota Health Department; R.N. Barr Library
CDC – Nat. Center for Infectious Diseases, Div. of Parasitic Diseases, Cercarial Dermatitis
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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.

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