Summary of potential mechanisms by which H Summary of potential mechanisms by which H. pylori may lead to gastric secretory abnormalities. D, somatostatin cell; ECL, enterochromaffin-like cell; G, G cell. (Adapted from J Calam et al: Gastroenterology 113:543, 1997.) Source: Chapter 293. Peptic Ulcer Disease and Related Disorders, Harrison's Principles of Internal Medicine, 18e Citation: Longo DL, Fauci AS, Kasper DL, Hauser SL, Jameson J, Loscalzo J. Harrison's Principles of Internal Medicine, 18e; 2012 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/harr/harr_c293f007.gif&sec=40755513&BookID=331&ChapterSecID=40727086&imagename= Accessed: November 05, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved