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Clinical Trial
. 2016 Jan 4;6(1):e009894.
doi: 10.1136/bmjopen-2015-009894.

Performance evaluation of the PelvoCheck CT/NG test kit for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae

Thomas Meyer  1 , Christian Klos  2 , Regina Kofler  3 , Annett Kilic  4 , Kristina Hänel  4
Affiliations
Clinical Trial

Performance evaluation of the PelvoCheck CT/NG test kit for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae

Thomas Meyer et al. BMJ Open. .

Abstract

Objective: Assessment of the performance of the PelvoCheck CT/NG test (Greiner-Bio-One GmbH) to detect Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) in first-void urine (FVU) of females.

Design: A cross-sectional study to compare the PelvoCheck CT/NG with COBAS TaqMan CT Test V.2.0 (Roche) for the detection of CT and with an in-house porA-based PCR for the detection of NG in FVU specimens. In addition, pools of 5 FVU specimens containing only CT-negative or 1 CT-positive and 4 CT-negative samples were tested. Abbott RealTime CT/NG was used as an additional test to resolve discordant results.

Setting: Samples sent from six laboratories were tested at the University Medical Center Hamburg.

Participants: Urine samples were from 1622 female patients attending gynaecological practices for chlamydia screening, another 120 urine samples were from patients pretested for NG at Synlab, Medical Service Center, Weiden GmbH. In addition, 50 urine samples spiked with various concentrations of reference material were used.

Results: For the detection of CT and NG, the sensitivity and specificity of the PelvoCheck CT/NG test were 98.8% and 100%, and 98.3% and 98.2%, respectively. The data obtained with the PelvoCheck CT/NG for pooled urine specimens resulted in a positive agreement of 90.9% and a negative agreement of 100%.

Conclusions: The PelvoCheck CT/NG assay is a suitable test method for the detection of CT and NG in female FVU samples, with sensitivity and specificity comparable with other Food and Drug Administration approved CT/NG nucleic acid amplification tests. To the best of our knowledge, this is the first commercial test system validated for the analysis of pooled urine specimens. No false-positive or invalid result was observed in 55 analysed pools. Nevertheless, 5 samples were false negative due to a target concentration below the limit of detection of the PelvoCheck CT/NG test as a consequence of pooling-associated dilution.

Keywords: MOLECULAR BIOLOGY; SEXUAL MEDICINE.

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Figures

Figure 1
Figure 1
Flow chart of the testing procedure.
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