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Updated: Jul 13, 2026

Multiplex Detection of Bacteria in Complex Clinical and Environmental Samples using Oligonucleotide-coupled Fluorescent Microspheres
Published on: October 23, 2011
HLA typing with sequence-specific oligonucleotide primed PCR (PCR-SSO)and use of the Luminex technology
1Department of Hematology, Ibni Sina Hospital, Ankara University, Ankara, Turkey.
Abstract:
The hybridization products obtained by PCR using sequence-specific oligonucleotides (PCR-SSO) can be traced either by colorimetric- (streptavidin- biotin), X-ray-(digoxigenin-CSPD), or fluorescence- (FITC, PE) based detection systems. To achieve a faster, reliable, automated typing, microbead and fluorescence detection technology have been combined and introduced to this field (XMAP technology). For each locus, a maximum of 100 microspheres, which are recognizable by their specific color originating from two internal fluorescent dyes, are used. Each microsphere is coupled with a single probe that is capable of hybridizing with the biotin labeled complementary amplicon. Once hybridization occurs, it can be quantified via the fluorescence signal originating from fluorescently (Streptavidin-PE) labeled amplicons captured by the beads. Currently, there are two commercially available systems that differ in the scale of probes and the method of amplification or denaturation. One of these will be described in detail in this chapter.
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