Affiliation:
1. Departments of Medicine1 and
2. Department of Clinical Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana 226022
3. Pathology,3 University of Virginia Health Sciences Center, Charlottesville, Virginia 22908, and
Abstract
ABSTRACT
Stool, gastric biopsy, and serum samples were collected from 22 subjects. DNA from stool was extracted, amplified, and hybridized with primers specific for the 16S rRNA gene of
Helicobacter pylori
. DNA from gastric biopsy specimens was analyzed similarly for comparison. Universal primers were used to confirm successful extraction of DNA from samples. Histologic, serologic, and DNA analyses were scored in a blinded fashion. Universal primer amplification verified successful DNA extraction from all stool and gastric tissue specimens. The gastric tissue DNA assay was positive for
H. pylori
in 11 of the 22 subjects, correlating completely with histologic and serologic results. Stool DNA was positive for
H. pylori
by our molecular assay in 8 of these 11
H. pylori
-positive subjects. All subjects who were negative by histologic, serologic, and gastric tissue DNA analyses were also negative by stool DNA analysis. Compared to histology, serology, and gastric tissue DNA analyses, the sensitivity of our stool DNA assay was 73%, with a specificity of 100%.
Publisher
American Society for Microbiology
Cited by
66 articles.
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