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Molecular and Cellular Probes
Volume 16, Issue 5, October 2002, Pages 341-350
 
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doi:10.1006/mcpr.2002.0432    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2002 Elsevier Science Ltd. All rights reserved.

Regular Article

Development of a membrane-array method for the detection of human intestinal bacteria in fecal samples

R. F. Wangf1, S. -J. Kim, L. H. Robertson and C. E. Cerniglia

Division of Microbiology, National Center for Toxicological Research, Food and Drug Administration, 3900 NCTR Rd. Jefferson, AR, 72079, USA

Received 23 March 2002; 
accepted 3 July 2002. ;
Available online 5 December 2002.

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Abstract

A membrane-array method was developed for the detection of human intestinal bacteria in fecal samples without using the expensive microarray-arrayer and laser-scanner. The 16S rDNA sequences of 20 predominant human intestinal bacterial species were used to design oligonucleotide probes. Three 40-mer oligonucleotides specific for each bacterial species (total 60 probes) were synthesized and applied to nitrocellulose membranes. Digoxigenin (DIG)-labeled 16S rDNAs were amplified by polymerase chain reaction (PCR) from human fecal samples or pure cultured bacteria using two universal primers, and were hybridized to the membrane-array. Hybridization signals were read by NBT/BCIP color development. The 20 intestinal bacterial species tested were Bacteroides thetaiotaomicron, B. vulgatus, B. fragilis, B. distasonis, Clostridium clostridiiforme, C. leptum, Fusobacterium prausnitzii, Peptostreptococcus productus,Ruminococcus obeum , R. bromii, R. callidus, R. albus, Bifidobacterium longum, B. adolescentis, B. infantis, Eubacterium biforme, E. aerofaciens, Lactobacillus acidophilus,Escherichia coli , and Enterococcus faecium. The two universal primers were able to amplify full size 16S rDNA from all of the 20 bacterial species tested. The hybridization results indicated that the membrane-array method is a reliable technique for the detection of predominant human intestinal bacteria in the fecal samples. The result was also confirmed by using specific PCR methods for these bacteria.

Author Keywords: membrane-array method, microarray, human intestinal bacteria, PCR, 16S rDNA amplification


 
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