Reliability of Helicobacter pylori and CagA Serological Assays
نویسندگان
چکیده
منابع مشابه
Serological differentiation of Helicobacter pylori CagA(+) and CagA(-) infections.
Many Helicobacterpylori strains causing gastroduodenal diseases have a cagA gene encoding CagA protein, a virulence factor of these bacteria. Anti-CagA antibodies produced by the majority of people infected with CagA(+) strains can indicate such an infection. In this study, the efficacy of three immunoenzymatic tests for detecting CagA(+) and CagA(-) infections were compared: immunoblot (Mileni...
متن کاملComparison of four serological tests to determine the CagA or VacA status of Helicobacter pylori strains.
We compared four tests for antibodies to CagA or VacA, HelicoBlot 2. 0, RIDA Blot Helicobacter, CHIRON RIBA H. pylori SIA, and an enzyme-linked immunosorbent assay using recombinant CagA. Immunoblot assays were accurate for determining Helicobacter pylori status but poor for determining CagA or VacA status (accuracy, 66 to 80% for CagA status and 34 to 67% for VacA status). None can be recommen...
متن کاملCharacterizing Helicobacter pylori cagA in Myanmar
Background/Aims Differences in the Helicobacter pylori infection rate are not sufficient to clarify the dissimilarity of gastric cancer incidence between Myanmar and its neighboring countries. To better understand this trend, the H. pylori virulence gene cagA was characterized in Myanmar. Methods Glutamate-proline-isoleucine-tyrosine-alanine (EPIYA) patterns and CagA multimerization (CM) moti...
متن کاملSerum VEGF Levels in Helicobacter pylori Infection and Correlation with Helicobacter pylori cagA and vacA Genes
BACKGROUND Helicobacter pylori vacA and cagA genes are associated with higher virulence. Vascular Endothelial Growth Factor (VEGF) is one important marker for neo-angiogenesis. AIM The purpose of this study was to investigate the relationship between VEGF serum levels with cagA and vacA genes in H. pylori infection. METHODS A cross-sectional study was done on eighty patients that consecutiv...
متن کاملClinical relevance of Helicobacter pylori cagA and vacA gene polymorphisms.
BACKGROUND & AIMS The Helicobacter pylori gene cagA and s1 or m1 forms of vacA are more common in disease-associated strains. Recently, forms of cagA encoding multiple type C EPIYA segments (which increase phosphorylation-dependent CagA activity) and a new type i1 "intermediate region" polymorphism in vacA (which confers toxicity) have been described. We assessed the association of new and esta...
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ژورنال
عنوان ژورنال: Clinical and Vaccine Immunology
سال: 2002
ISSN: 1556-6811,1556-679X
DOI: 10.1128/cdli.9.2.412-416.2002