Figure 1. Gastroduodenoscopy showing multiple erosive lesions in the entire gastric mucosa (indigo carmine dye contrast).

From: Gastric Syphilis in a Human Immunodeficiency Virus–Infected Patient

Figure 2. Gastric biopsy specimen immunostained with anti-Treponema pallidum polyclonal antibodies showing several spirochete cells stained brown in the interstitium (arrow). Magnification, ×400.

From: Gastric Syphilis in a Human Immunodeficiency Virus–Infected Patient

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