See full list on mayoclinic. org. Helicobacter pylori h sinusitis pylori (h. pylori) infection occurs when h. pylori bacteria infect your stomach. this usually happens during childhood. a common cause of peptic ulcers, h. pylori infection may be present in more than half the people in the world. most people don't realize they have h. pylori infection, because they never get sick from it. Results: h. pylori dna was found in the sinus mucosa of 15. 4% of patients with chronic rhinosinusitis, and all of them showed con current h. pylori stomach infection. sinus colonization was not found without simultaneous gastric colonization, although most patients with gastric infection did not have the bacterial dna in their sinuses. Conclusions: it is possible to detect h pylori in the sinus mucosa of some patients with crs. however, whether h pylori is a causative agent for crs or a result of crs is not known. Could Hidden H Pylori Infection Be Making You Sick Three of four patients with pos...