Endoscopic and histopathological study on the duodenum of Strongyloides stercoralis hyperinfection

Figure 1 Frequency of abnormal endoscopic findings in the duodenum

Figure 2 Comparison of endoscopic severity of the duodenum between the patients with larvae present and larvae absent in the duodenal biopsy (P < 0. 05, Mann-Whitney U-test).

Figure 3 Representative endoscopic image and HE staining of duodenal biopsy. A: EGD showing white villi and edematous mucosa in the second part of duodenal (Case 11); B: Biopsy specimen from the mucosa showing numerous larvae with villous atrophy and mild inflammatory cell infiltration (HE, × 200).

Figure 4 Endoscopic image and HE staining of duodenal biopsy. A: EGD showing white villi and stenosis in the second part of duodenal (Case 16); B: Biopsy specimen from the mucosa showing numerous larvae with severe villous atrophy and moderate inflammatory cell infiltration (HE, × 200).

Figure 5 Endoscopic findings and HE staining of duodenal biopsy. A: EGD showing large ulcers and pseudopolyps in the second part of duodenal (Case 15); B: Biopsy specimen from the margin of the ulcer showing formation of granulation tissue and complete destruction of the villi. Numerous larvae are observed within the granulation and lymph vessels (HE, × 100).