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Electron micrograph shows changes in the infected non-treated mucosal lining. A; nuclei with a lot of heterochromatin (N.H), damaged microvilli (M.V), and a lot of abnormal mitochondria (A.M; blue arrows). B; Microfold cells (M.C) containing internalized parasite (P) notice the untightly arranged microvilli (Scale bar; 500 nm). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
