Supplementary Figure 1.

Microscopic image of the squamous papilloma (Fig. 1) arising from the non-glandular stomach of a wild Norway rat (Rattus norvegicus). (A) The mass is comprised of a hyperplastic mucosa overlying a severely edematous submucosa. Scale bar = 6 mm. (B) Cross-sections of Eucoleus sp. adults and eggs within the thickened keratin and superficial mucosa. Scale bar = 300 μm. (C) Eucoleus sp. eggs within the thickened keratin. The underlying mucosa is moderately to severely hyperplasic and the subcutaneous tissues are edematous.