Fig. 1. Abdominal computed tomography scan showing the stomach distension and irregular wall thickening in the pylorus.

Fig. 2. Endoscopic view of the gastric body showing a distended fluid-filled stomach.

Fig. 3. Targeted biopsies were taken from the edematous pyloric opening (A) and a hyperemic patch at the greater curvature of the stomach (B).

Fig. 4. Microorganisms within the tetrads found during the gastric mucosal biopsy (hematoxylin & eosin stain, ×40).