Association of Helicobacter pylori infection with olfactory function using smell identification screening test

The aim of the present study is to investigate the role of Helicobacter pylori in olfactory function. Thirty-six patients (mean age 38.5) aged between 18 and 55 years who were diagnosed with H. pylori by gastric biopsies and age- and sex-matched 30 healthy adults (mean age 33.6) were included in the study. All participants underwent a detailed ear–nose–throat examination including endoscopic examination of the nasal cavity and laryngeal area, and olfactory tests were performed using the Sniffin’ Sticks, a 12-item screening test (Sniffin’Sticks; Burghart, Wedel, Germany) and odor scores were recorded. The mean odor score was 7.9 ± 1.7 (range 2–10) in the patient group and 10.3 ± 1.4 (range 6–12) in the control group. There were significant lower scores in the patient group compared to the control group (p < 0.05). In conclusion, it is apparent that there is an association of H. pylori infection with olfactory dysfunction. H. pylori infection should be considered as possible etiological factors in patients with olfactory dysfunction.