Egd shows mild reactive gastropathy, but i don't drink (quit or 4 years ago) or take nsaids. neg. for h. pylori. what else could cause this?

HP -ve gastritis com: Recent studies using histology alone in select patients have suggested that Helicobacter pylori-negative gastritis may be common, found in 21 % of Gastritis Reason for HP -ve gastritis is assumed to be due to Previous and chr. use of PPI, long-term PPI use can lead to gastric inflammation, possibly through microbial overgrowth,Infection by organisms other than H. pylori (CMV, Myco.Avium,HSV)