ID#: 8556
Caption:
Under a magnification of 150X, this historic 1942 photomicrograph, revealed some of the morphologic details displayed by a free-swimming cercaria, which is the the larval stage of a schistosome parasite that causes a condition known as swimmer’s itch. 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, like the parasite pictured here. This material was obtained from Prof. William A. Riley, of the University of Minnesota. The sample itself had been harvested from Lake Owasso, Minnesota.
High Resolution: Click here for hi-resolution image (9.53 MB)
Content Provider(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
Categories:
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.