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Journal of Clinical Microbiology, July 1999, p. 2236-2240, Vol. 37, No. 7
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Detection of Helicobacter pylori DNA in Fecal Samples from Infected Individuals

William A. Gramley,1 Ali Asghar,2 Henry F. Frierson Jr.,3 and Steven M. Powell1,*

Departments of Medicine1 and Pathology,3 University of Virginia Health Sciences Center, Charlottesville, Virginia 22908, and Department of Clinical Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, Indiana 226022

Received 7 January 1999/Returned for modification 15 March 1999/Accepted 16 April 1999

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%.

* Corresponding author. Mailing address: University of Virginia Health Sciences Center, Box 10013, Charlottesville, VA 22906-0013. Phone: (804) 243-2655. Fax: (804) 243-6169. E-mail: smp8n{at}virginia.edu.

Journal of Clinical Microbiology, July 1999, p. 2236-2240, Vol. 37, No. 7
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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