Life cycle of trichinae (Trichinella spiralis) in swine diagram. Illustration in "Internal Parasites of Swine", Farmers' Bulletin 1787, 1961. Figure 31.

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Citation

E.B.F.. 1936. “Life cycle of trichinae (Trichinella spiralis) in swine diagram. Illustration in "Internal Parasites of Swine", Farmers' Bulletin 1787, 1961. Figure 31..” Special Collections, USDA National Agricultural Library. Accessed August 9, 2022, https://www.nal.usda.gov/exhibits/speccoll/items/show/8090.