Features and Benefits

  • The most important pathogens causing STD in one assay
  • Diagnosis in 2.5 hours after nucleic acid extraction
  • Detection based on melting curve analysis
  • As sensitive as monoplex real-time PCR
  • Internal Control included
  • Amplification Controls included
  • Positive Control included
  • Interpretation software available

Overview

Sexually transmitted diseases (STDs) are a major cause of morbidity in sexually active individuals and continue to pose major medical, social and economic burden worldwide. Untreated STDs can lead to infertility in both men and women. The development of fast laboratory diagnostic screening methods for STDs is an imperative tool to reduce transmission of STDs worldwide.

The STD-Finder® 2SMART is a multiplex PCR test which can detect and differentiate the most important pathogens involved in STD infections in a single assay using melting curve analysis on real-time PCR instruments.

Targets

Bacteria

Chlamydia trachomatis
(dual target)

Chlamydia trachomatis
LGV variant

Neisseria gonorrhoeae

Neisseria gonorrhoeae
with mosaic pen A gen (cephalosporin resistant superbug status)

Ureaplasma urealyticum

Mycoplasma genitalium

Treponema pallidum


Viruses

Herpes simplex virus type 1

Herpes simplex virus type 2

Parasite

Trichomonas vaginalis



Detection systems

STD-Finder® 2SMART is validated using the LightCycler® 480 of Roche and Rotor-Gene Q® of QIAGEN.

Improvements

STD-Finder® 2SMART has been improved regarding the previous
STD-Finder® SMART 7:

  • Faster time to result: results within 2.5 hours
  • Simplified procedure: two steps-protocol
  • Addition of pathogens
  • Addition of Amplification Control
  • Addition of Positive Control
  • Availability of interpretation software

Analysis and Interpretation

STD-Finder® 2SMART makes use of melting curve analysis for the detection of the pathogen(s) present in the sample.

The reverse primer of the signal amplification step contains a FAM fluorescent label. This FAM label is incorporated in the amplified sequences. Detection probes used for pathogen detection are labeled with ROX or CY5. After amplification a melt is performed. The melting curve analysis reveals melting peaks with a specific melting temperature in either FAM/ROX or FAM/Cy5 detection channel for each pathogen present in the sample. Iowa Black FQ (IABkFQ) labels are used for detection of the Internal Control and Amplification Control. Since IABkFQ is a quencer and not a fluorescent label, melting curve analysis of Internal Control and Amplification Controls reveal a negative melting peak in the FAM detection channel.

Procedure

After a gene-specific multiplexpre-amplification step, a signal amplification step is performed using a universal PCR primer pair of which one primer is labeled with a fluorescent dye (FAM).

The detection of the amplified FAM labelled probes is by melting curve analysis on a real-time PCR system. Twelve detection probes, either ROX or Cy5 labelled and varying in melting temperature, enable specific detection of the amplified product and the corresponding pathogen.

The Internal Control (IC), which is added at the start of the procedure, and is detected by a specific detection probe in an additional channel, is included in the assay to validate a negative sample result.

AN Amplification Controls (AC) is provided in the signal amplification step to control for a correct amplification procedure.

Internal Amplification Control

The STDFinder® 2SMART contains an Internal Control which is added to the sample in the nucleic acid extraction procedure. The Internal Control is supplied as a control for the STD-Finder® 2SMART procedure and to check for possible PCR inhibitors present in the sample.

A negative test result is validated by the presence of the Internal Control result.

Quality

  • Designed and manufactured under EN ISO 13485:2012
  • CE-IVD marked 
  • Validated on QCMD panels
  • Validated on clinical samples