Repository of Research and Investigative Information

Repository of Research and Investigative Information

Rafsanjan University of Medical Sciences

Specific serum immunoglobulin G to H pylori and CagA in healthy children and adults (south-east of Iran)

(2007) Specific serum immunoglobulin G to H pylori and CagA in healthy children and adults (south-east of Iran). World Journal of Gastroenterology. pp. 3117-3121. ISSN 1007-9327

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Abstract

AIM: To evaluate the serologic IgG response to H. pylori and CagA across age groups and in healthy children and adults. METHODS: Totally, 386 children aged 1-15 years and 200 adults aged 20-60 years, were enrolled to study. The serum samples of participant were tested for presence of anti-H pylori and anti-CagA IgG by using ELISA method. RESULTS: The seroprevalence of H pylori in adults was significantly higher than that observed in children (67.5 vs 46.6; P < 0.000003). In children, the seropositivity rate in males (51.9) was significantly (P < 0.05) higher than that observed in females (41.7). The prevalence of serum anti-CagA antibody was 72.8 and 67.4 in infected children and adults, respectively. The mean titer of serum anti-CagA antibodies was significantly higher among children in comparison to adults (64.1 Uarb/mL vs 30.7; P < 0.03). In infected children and adults the prevalence of serum anti-CagA antibody was higher in males compared to females (78.4 vs 66.3; P = 0.07 and 75.6 vs 54.71; P < 0.04, respectively). The age-specific prevalence of anti-H pylori and anti-CagA antibody (in infected subjects) was 37.6 and 59.57 at age 1-5 years, 46.9 and 75 at age 6-10 years, 54.9 and 79.45 at age 11-15, 59.01 and 83.33 at age 20-30 years, 66.6 and 60.52 at age 31-40 years, 73.46 and 63.88 at age 41-50 years and 75.75 and 60 at age 51-60 years with mean titer of anti-CagA antibody of 75.94, 63.32, 57.11, 52.06, 23.62, 21.52 and 21.80 Uarb/mL, respectively. There was significant difference between mean serum anti-CagA antibody in age subgroups (P < 0.001). CONCLUSION: These results showed that anti-H pylori and anti-CagA antibodies were common in the children and adults. The H pylori-specific antibodies influenced by age and sex of subjects. Moreover, it seems that males are more susceptible to infection with CagA(+) strains compared to females. The seroprevalence of anti-CagA antibody was increased with age, up to 30 years and then decreased. It was also found that the magnitude of the IgG response to CagA decreased with advanced age. (c) 2007 The WJG Press. All rights reserved.

Item Type: Article
Keywords: seroprevalence H pylori adults children CagA Iran asymptomatic subjects high prevalence risk-factors infection population antibodies seroprevalence colonization transmission adolescents Gastroenterology & Hepatology
Page Range: pp. 3117-3121
Journal or Publication Title: World Journal of Gastroenterology
Journal Index: ISI
Volume: 13
Number: 22
ISSN: 1007-9327
Depositing User: مهندس مهدی شریفی
URI: http://eprints.rums.ac.ir/id/eprint/4924

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