Background-Helicobacter pylori infection raises basal and meal stimulated serum gastrin concentrations and lowers iron stores, which may in turn reduce fasting plasma glucose concentrations in the population. Aim-To determine whether H pylori infection leads to lower fasting plasma glucose concentrations in the population. Methods-One hundred and seventy three women and 165 men, randomly selected from the electoral rolls of an Australian city, participated in a cardiovascular risk factor survey. Plasma glucose concentrations and H pylori IgG antibody titres were measured. Non-fasting subjects and pregnant women were excluded, as were known diabetics, whose plasma glucose concentrations would be aVected by diet and/or medications. Fasting plasma glucose concentrations were logarithmically transformed and the relation with H pylori infection, adjusting for age and other confounding factors, was determined for men and women separately by analyses of variance. Helicobacter pylori infection in humans is recognised as a chronic infection that usually persists indefinitely.
Results-Helicobacter pylori1 As well as being involved in the development of several diseases, such as peptic ulcer and gastric cancer, H pylori may disturb normal biochemistry. Some of the changes could aVect fasting plasma glucose concentrations in the population.Infected healthy individuals have higher basal and meal stimulated serum gastrin concentrations throughout a 24 hour period than do non-infected people.2 Gastrin can inhibit glucose absorption in the small intestine, 3 and amplifies glucose stimulated insulin release. 4 A link between H pylori infection, serum gastrin, insulin concentrations, and serum glucose concentrations has been demonstrated in a small group of dyspeptic patients. 5 Because of the eVect of gastrin on insulin release and glucose absorption, infected healthy individuals may have lower postprandial and fasting plasma glucose concentrations than non-infected people.Two population based studies have shown that H pylori infection can also reduce iron stores in healthy people.6 7 Iron stores are positively correlated with blood glucose concentrations. 8 If H pylori infection leads to lower fasting plasma glucose concentrations in the population, this eVect would need to be considered when interpreting concentrations bordering on diabetes. Therefore, we studied the relation between H pylori infection and fasting plasma glucose concentration among adults in the general population.
Methods
SETTINGBallarat has a population of 78 000, 92% of whom were born in Australia. The prevalence of H pylori infection in the general population is 30.6%. Values are number (percentage) of subjects except where indicated otherwise. Excludes pregnant women, persons known to have diabetes, and subjects who had not fasted.