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. 2018 Sep 7;9:2055. doi: 10.3389/fimmu.2018.02055

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Copyright © 2018 Bušelić, Trumbić, Hrabar, Vrbatović, Bočina and Mladineo.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Histopathological findings in the stomach after A. pegreffii L3 larvae migration. (A) The early phase of migration of A. pegreffii L3 larvae through gastric wall mucosa causing compression and necrosis of surrounding parietal (Pc) and zymogenic cells (Zc). Larval migration caused rupture of both basement membrane and muscularis mucosae (Mm). A large necrotic area (asterisk) can be seen adjoining two blood vessels (Bv) right below the muscularis mucosae. Several strata of inflammatory cells (arrowheads) can be seen lining the site of larval penetration. At the periphery, extensive hemorrhage (H) with non-nucleated erythrocytes can be seen in the submucosa. Scale bar = 200 μm. (B) Detail of large necrotic area (asterisk) adjoining the blood vessel at the site of larval penetration, mixed with scant erythrocytes (thin arrows). At the bottom of lesion, neutrophils (arrows) can be seen lining the site of larval penetration. Scale bar = 50 μm (C) High magnification of inflammatory infiltrate closer to the site of penetration and large necrotic area with numerous neutrophils (arrows) and occasional macrophages (arrowheads) interspersed between collagen fibers (Cf), fibroblasts (Fb), and fibrocytes (Fc). Scale bar = 20 μm. (D) High magnification of extensive submucosal hemorrhage with numerous non-nucleated erythrocytes (thin arrows) and several macrophages (arrow heads) interspersed between collagen fibers (Cf), occasional fibroblasts (Fb), and fibrocytes (Fc). Scale bar = 20 μm (1% toluidine blue).