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Bulletin of the National Research Centre
Fig. 3 | Bulletin of the National Research Centre

Fig. 3

From: A comparative study of parasitic fauna in Amietophrynus regularis (Reuss, 1833) from natural habitats and dumpsites within Lagos Metropolis, Southwest Nigeria

Fig. 3Fig. 3

Photomicrograph of intestinal tissues. With few exceptions of stunting of villi (A thin arrow), photomicrographs of intestinal tissues of both infected and uninfected Amietophrynus regularis from dumpsites show normal villi structure, normal mucosa, submucosa, and muscularis with well-preserved crypt-villous architecture (B–D). Comparatively, uninfected Amietophrynus regularis from natural habitat also showed disseminated moderate stunting of villi (E, F thin arrows). Tissues of infected Amietophrynus regularis from the natural habitat showed the most of villi structure alterations which included the presence of lymphoid follicles (G thin arrow), mild vascular congestion (H thin arrow), chronic inflammatory cells (I thicker arrow), and severe fibrosis of villous structure (J thicker arrows). The lighter arrows indicate stunting of the villi structure. Parasite presence was observed in the lumen (K thin arrow) and focal area of fibrosis of submucosa (L thin arrow)

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