Pediatric Gastroenterology, Hepatology & Nutrition

The Korean Society of Pediatric Gastroenterology, Hepatology and Nutrition (대한소아소화기영양학회)
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Comparison of Four Commercial ELISA Kits and In-House Immunoblotting for Diagnosis of Helicobacter pylori Infection

  • Jeong, Hoar Lim (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Jung, Yang-Sook (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Jun, Jin-Su (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Yeom, Jung Sook (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Park, Ji Sook (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Seo, Ji-Hyun (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Lim, Jae-Young (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Park, Chan-Hoo (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Woo, Hyang-Ok (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Youn, Hee-Shang (Department of Pediatrics, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Ko, Gyung-Hyuck (Department of Pathology, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Baik, Seung-Chul (Department of Microbiology, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Lee, Woo-Kon (Department of Microbiology, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Cho, Myung-Je (Department of Microbiology, Gyeongsang National University School of Medicine, Institute of Health Science) ;
  • Rhee, Kwang-Ho (Department of Microbiology, Gyeongsang National University School of Medicine, Institute of Health Science)
  • Received : 2012.02.17
  • Accepted : 2012.06.13
  • Published : 2012.06.30
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Abstract

Purpose: Commercial enzyme-linked immunosorbent assay (ELISA) kits have been considered less reliable for children than for adults. The aim of this study was to compare four ELISA kits and in-house immunoblotting based on the analysis of anti-H. pylori-IgG antibody reactivity. Methods: A total of 399 serum samples were collected at the GNU Hospital during 1998-1999. All sera were tested using ELISA and immunoblotting. Statistically significant differences were determined by the $x^2$ test. Results: The overall seropositivity rates using GAP IgG, Genedia IgG, HM-CAP, Pyloriset EIA-G, and immunoblotting were 13.0%, 25.1%, 18.3%, 15.8%, and 62.9%, respectively. Immunoblotting showed a higher seropositivity rate than did all four ELISA kits in all age groups. Genedia IgG had the highest seropositivity among the ELISA kits. The seropositivity rate for children aged 13 to 18 months was lowest, and that of children aged 15 years was highest (90.0%). The seropositivity rate for children aged 7 months to 5 years was significantly lower than that for children aged 6 to 15 years among the four ELISA kits (p<0.0001) and immunoblotting (p=0.02). Conclusion: Immunoblotting is the most sensitive test for detection of anti-Helicobacter pylori IgG antibodies among the serological tests in this study. These results emphasize the need for standardization when commercial ELISA tests are used in different nations or in young age groups. Immunoblotting could be a suitable noninvasive assay for serodiagnosis and seroepidemiologic study of H. pylori infection in Korean children.

Keywords

Acknowledgement

Supported by : Ministry of Health & Welfare

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