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Journal of Clinical Microbiology, March 2001, p. 1097-1104, Vol. 39, No. 3
Departments of Advanced
Research,1 Assay
Development,2 and Molecular
Biology,3 Nanogen, Inc., San Diego, California
Received 31 July 2000/Returned for modification 19 September
2000/Accepted 8 December 2000
Species-specific bacterial identification of clinical specimens is
often limited to a few species due to the difficulty of performing
multiplex reactions. In addition, discrimination of amplicons is
time-consuming and laborious, consisting of gel electrophoresis, probe hybridization, or sequencing technology. In order to simplify the
process of bacterial identification, we combined anchored in situ
amplification on a microelectronic chip array with discrimination and
detection on the same platform. Here, we describe the simultaneous amplification and discrimination of six gene sequences which are representative of different bacterial identification assays:
Escherichia coli gyrA, Salmonella gyrA,
Campylobacter gyrA, E. coli parC, Staphylococcus mecA, and Chlamydia
cryptic plasmid. The assay can detect both plasmid and transposon genes
and can also discriminate strains carrying antibiotic resistance
single-nucleotide polymorphism mutations. Finally, the assay is
similarly capable of discriminating between bacterial species through
reporter-specific discrimination and allele-specific
amplification. Anchored strand displacement amplification allows
multiplex amplification and complex genotype discrimination on the same
platform. This assay simplifies the bacterial identification process
greatly, allowing molecular biology techniques to be performed with
minimal processing of samples and practical experience.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.3.1097-1104.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Antimicrobial Resistance and Bacterial
Identification Utilizing a Microelectronic Chip Array
and
*
Corresponding author. Mailing address: Assay
Development, Nanogen, Inc., 10398 Pacific Center Ct., San Diego, CA
92121. Phone: (858) 410-4718. Fax: (858) 410-4848. E-mail:
Cmiller{at}nanogen.com.
Present address: Molecular Reflections, San Diego, Calif.
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