Potential Complications of Helicobacter pylori Infection in Children of a Non-Urban Community

Age-Stratified Prevalence of Helicobacter pylori Infection in Children With Recurrent Abdominal Pain: A Prospective Observational Study

Background Recurrent abdominal pain (RAP), often considered functional, is a frequent complaint among pediatric patients. However, the increasing availability of advanced diagnostic tools like upper and lower gastrointestinal endoscopy, tests for Helicobacter pylori, and abdominal ultrasound have highlighted many organic causes, including Helicobacter pylori (H. pylori) infection, whose prevalence in children remains unclear. Objectives To determine the age-stratified prevalence of H. pylori infection and investigate its role along with other etiologies contributing to RAP in pediatric patients. Methods This cross-sectional observational study was conducted between October 2019 and April 2021, involving 60 children aged two to 14 years who met the Rome IV criteria for RAP. Comprehensive evaluations included detailed history-taking, physical examination, and upper gastrointestinal endoscopy with biopsy. Mucosal samples from the antrum were subjected to a rapid urease test (RUT) to detect H. pylori infection. The presence of endoscopic abnormalities and their association with positive RUT results were analyzed to identify the underlying causes of RAP. Results H. pylori infection was identified in 11 (18.3%) children, with the highest prevalence among children aged seven to 12 years (n=34; 56.7%). All biopsy-positive cases showed concordant rapid urease test results (p=0.001). Organic etiologies were identified in 34 (56.7%) patients, with gastritis and gastric ulcers being the most common findings. Other causes included mesenteric lymphadenitis, urinary tract infections, duodenal ulcers, and hiatus hernia. Children with H. pylori infections predominantly exhibited endoscopic abnormalities, underscoring its role in RAP. Conclusion H. pylori infection shows a marked increase with age and is a significant organic cause of RAP. Thorough investigations, including endoscopic evaluations, are essential to uncover organic etiologies. Targeted treatment for H. pylori should be prioritized in children over seven years presenting with RAP, emphasizing the need for a systematic approach to diagnosing and managing this condition.

Intestinal parasites, growth and physical fitness of schoolchildren in poor neighbourhoods of Port Elizabeth, South Africa: a cross-sectional survey

Background

As traditional lifestyle and diets change with social and economic development, disadvantaged communities in low- and middle-income countries increasingly face a double burden of communicable and non-communicable diseases. We studied the relationship between physical fitness and infections with soil-transmitted helminths (STHs), intestinal protozoa and Helicobacter pylori among schoolchildren in Port Elizabeth, South Africa.

Methods

We conducted a cross-sectional survey among 1009 children, aged 9 to 12 years, from eight primary schools in socioeconomically disadvantaged neighbourhoods of Port Elizabeth. Physical fitness was determined using field-deployable tests of the Eurofit fitness test battery. Stool samples were analysed with the Kato-Katz thick smear technique to diagnose STHs and with rapid diagnostic tests (RDTs) to detect intestinal protozoa and H. pylori infections. Haemoglobin (Hb) levels were assessed and anthropometric indicators determined.

Results

Complete data were available for 934 children (92 %). In two schools, high STH prevalences were found (Ascaris lumbricoides 60 and 72 %; Trichuris trichiura 65 % each). For boys and girls co-infected with A. lumbricoides and T. trichiura (n = 155) the maximal oxygen uptake (VO₂ max) was estimated to be 50.1 and 47.2 ml kg^-1 min^-1, compared to 51.5 and 47.4 ml kg^-1 min^-1 for their non-infected peers (n = 278), respectively. On average, children without helminth infections had greater body mass (P = 0.011), height (P = 0.009) and a higher body mass index (P = 0.024) and were less often stunted (P = 0.006), but not significantly less wasted compared to their peers with a single or dual species infection. Among 9-year-old boys, a negative correlation between helminth infections and VO₂ max, grip strength and standing broad jump distance was observed (P = 0.038). The overall mean Hb level was 122.2 g l^-1. In the two schools with the highest prevalence of STHs the Hb means were 119.7 and 120.5 g l^-1, respectively.

Conclusions

Intestinal parasite infections appear to have a small but significant negative effect on the physical fitness of infected children, as expressed by their maximal oxygen uptake. We observed a clear impact on anthropometric indicators.

Electronic supplementary material

The online version of this article (doi:10.1186/s13071-016-1761-5) contains supplementary material, which is available to authorized users.