Rapid identification of pathogenic bacteria by capillary electrophoretic analysis of rRNA genes.
Molecular diagnosis is playing an increasingly important role in the rapid detection and identification of pathogenic organisms in clinical samples. The genetic variation of ribosomal genes in bacteria offers an alternative to culturing for the detection and identification of these organisms. Here 16S rRNA and 16S-23S rRNA spacer region genes were chosen as the amplified targets for single-strand conformation polymorphism (SSCP) and restriction fragment length polymorphism (RFLP) capillary electrophoresis analysis and bacterial identification. The multiple fluorescence based SSCP method for the 16S rRNA gene and the RFLP method for the 16S-23S rRNA spacer region gene were developed and applied to the identification of pathogenic bacteria in clinical samples, in which home-made short-chained linear polyacrylamide (LPA) was used as a sieving matrix; a higher sieving capability and shorter analysis time were achieved than with a commercial sieving matrix because of the simplified template preparation procedure. A set of 270 pathogenic bacteria representing 34 species in 14 genera were analyzed, and a total of 34 unique SSCP patterns representing 34 different pathogenic bacterial species were determined. Based on the use of machine code to represent peak patterns developed in this paper, the identification of bacterial species becomes much easier.
Zhao
Chunxia
C
National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116011, China.
Xu
Guowang
G
Gao
Peng
P
Yang
Jun
J
Shi
Xianzhe
X
Tian
Jing
J
D001419:Bacteria / Q000235:genetics* / Q000472:pathogenicity*; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D020459:Genes, rRNA; D025202:Molecular Diagnostic Techniques; D018807:Polymorphism, Single-Stranded Conformational; D012336:RNA, Ribosomal, 16S / Q000235:genetics
D021903:DNA, Ribosomal Spacer; D012336:RNA, Ribosomal, 16S