BACKGROUND: Helicobacter pylori infection is usually acquired during childhood and is a known risk factor for the development of gastric malignancies in adulthood. It has been reported that early age at first infection may determine a neoplastic outcome in adults. The purpose of this study was to determine the prevalence of Helicobacter pylori infection in children residing in areas with high (Pasto) and low risk (Tumaco) of gastric cancer in Colombia to evaluate whether differences in the age of acquisition of H. pylori infection were present in the two populations. MATERIALS AND METHODS: The study sample was based on a census taken in 1999. Using the (13)C-urea breath test, we compared the prevalence of H. pylori infection among children aged 1-6 years. RESULTS: Among 345 children in Pasto, 206 (59.7%) were H. pylori-positive, compared with 188 (58.6%) among 321 children in Tumaco. The two populations share a common pattern of very early age at infection and marked increase in prevalence during the first 4 years of life. No differences in any one year were observed when comparing the two groups. CONCLUSIONS: The prevalence of infection was similarly high and increased with age in both populations. In these populations the age of acquisition of H. pylori after 1 year of age does not appear to be a primary factor responsible for the differences in the rates of gastric cancer incidence in adults. Previous findings in adults showed lower prevalence of the most virulent genotypes in Tumaco compared to Pasto, and bacterial virulence may play a key role in determining cancer outcome.
BACKGROUND:Helicobacter pyloriinfection is usually acquired during childhood and is a known risk factor for the development of gastric malignancies in adulthood. It has been reported that early age at first infection may determine a neoplastic outcome in adults. The purpose of this study was to determine the prevalence of Helicobacter pyloriinfection in children residing in areas with high (Pasto) and low risk (Tumaco) of gastric cancer in Colombia to evaluate whether differences in the age of acquisition of H. pyloriinfection were present in the two populations. MATERIALS AND METHODS: The study sample was based on a census taken in 1999. Using the (13)C-urea breath test, we compared the prevalence of H. pyloriinfection among children aged 1-6 years. RESULTS: Among 345 children in Pasto, 206 (59.7%) were H. pylori-positive, compared with 188 (58.6%) among 321 children in Tumaco. The two populations share a common pattern of very early age at infection and marked increase in prevalence during the first 4 years of life. No differences in any one year were observed when comparing the two groups. CONCLUSIONS: The prevalence of infection was similarly high and increased with age in both populations. In these populations the age of acquisition of H. pylori after 1 year of age does not appear to be a primary factor responsible for the differences in the rates of gastric cancer incidence in adults. Previous findings in adults showed lower prevalence of the most virulent genotypes in Tumaco compared to Pasto, and bacterial virulence may play a key role in determining cancer outcome.
Authors: Liviu A Sicinschi; Pelayo Correa; Luis E Bravo; Richard M Peek; Keith T Wilson; John T Loh; Maria C Yepez; Benjamin D Gold; Dexter T Thompson; Timothy L Cover; Barbara G Schneider Journal: Helicobacter Date: 2012-04 Impact factor: 5.753
Authors: Barbara G Schneider; Dun-Fa Peng; M Constanza Camargo; M Blanca Piazuelo; Liviu A Sicinschi; Robertino Mera; Judith Romero-Gallo; Alberto G Delgado; Luis E Bravo; Keith T Wilson; Richard M Peek; Pelayo Correa; Wael El-Rifai Journal: Int J Cancer Date: 2010-12-01 Impact factor: 7.396
Authors: John T Loh; Carrie L Shaffer; M Blanca Piazuelo; Luis E Bravo; Mark S McClain; Pelayo Correa; Timothy L Cover Journal: Cancer Epidemiol Biomarkers Prev Date: 2011-08-22 Impact factor: 4.254
Authors: Javier Torres; Pelayo Correa; Catterina Ferreccio; Gustavo Hernandez-Suarez; Rolando Herrero; Maria Cavazza-Porro; Ricardo Dominguez; Douglas Morgan Journal: Cancer Causes Control Date: 2012-12-07 Impact factor: 2.506
Authors: Alisbeth D Fuenmayor-Boscán; Ileana M Hernández; Kutchynskaya J Valero; América M Paz; Lisette B Sandrea; Zulbey Rivero Journal: Indian J Gastroenterol Date: 2016-05-02
Authors: L A Sicinschi; P Correa; R M Peek; M C Camargo; M B Piazuelo; J Romero-Gallo; S S Hobbs; U Krishna; A Delgado; R Mera; L E Bravo; B G Schneider Journal: Clin Microbiol Infect Date: 2009-05-15 Impact factor: 8.067
Authors: M Blanca Piazuelo; M Constanza Camargo; Robertino M Mera; Alberto G Delgado; Richard M Peek; Hernan Correa; Barbara G Schneider; Liviu A Sicinschi; Yolanda Mora; Luis E Bravo; Pelayo Correa Journal: Hum Pathol Date: 2008-07-09 Impact factor: 3.466