Evaluation of a dilution method for non-evaluable results in the detection of Chlamydia trachomatis and Neisseria gonorrhoeae with the Cobas 4800 platform.

Abstract:

INTRODUCTION:A variable percentage of samples analysed using the Cobas 4800 assay can give an invalid result by PCR inhibition or erroneous due to incorrect DNA extraction with the Cobas 4800 CT/NG test. METHOD:An analysis was performed using the vortex agitation and dilution protocol on the original sample (swab or urine) for a total of 116 samples. In order to analyse the sensitivity of this method, 100 samples (swabs and urine) with known results were retested. RESULTS:A total of 98.3% (114/116) of the samples analysed were resolved with this protocol with 100% agreement after reviewing clinical data, Gram stain, and other samples analysed in parallel from the same patient. DISCUSSION:The data indicate no loss of sensitivity with this protocol; thus Cobas 4800 users could use this method without the need for alternative methods.

authors

Parra-Sánchez M,García-Rey S,Zakariya-Yousef Breval I,Sierra-Atienza C,Bernal-Martínez S,Palomares-Folía JC

doi

10.1016/j.eimc.2015.06.017

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

364-366

issue

6

eissn

0213-005X

issn

1578-1852

pii

S0213-005X(15)00275-X

journal_volume

35

pub_type

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