Asymptomatic Helicobacter pylori infection among rural children and adolescents in Bangladesh

Background and objectives: The Helicobacter pylori infection rate varies according to the age, location of the residence and socioeconomic status. The aim of the present study was to investigate the status of H. pylori infection among the asymptomatic Bangladeshi rural children and adolescents. Material and methods: This cross-sectional study was carried out in a rural area under Pabna district about 150 km north-west of capital Dhaka. Asymptomatic and apparently healthy rural children and adolescents aged 6 to 18 years were enrolled in the study. A structured questionnaire was used to record the socio-demographic and clinical information. The rate of H. pylori infection was determined by the presence of H. pylori antigen in faeces and/or anti-H. pylori IgG and/or IgA antibodies in blood. H. pylori stool antigen was detected by lateral flow chromatographic immunoassay and serum anti-H. pylori IgG and IgA antibodies were estimated by ELISA method. Results: A total number of 185 asymptomatic and apparently healthy children and adolescents were enrolled of which 34, 131 and 20 were in 6-10, 11-15 and 16-18 years age groups respectively. The overall H. pylori infection rate was 79.5% (95% CI: 0.729, 0.85) by positive stool antigen or by the presence of serum anti-H. pylori IgG/IgA antibodies. The rate of H. pylori infection significantly (p=0.05) increased with progress of age. H. pylori infection rate was 67.6%, 80.2% and 95% in 6-10, 11-15 and 16-18 years age groups respectively. The concentration of serum anti-H. pylori IgG/IgA antibodies did not differ across the age groups. The infection rate was significantly (p