Diagnostic relevance of simultaneous testing for Chlamydia trachomatis and Neisseria gonorrhoeae

作者：Sakem B; Michel R; Nydegger U E^*; Radjenovic D; Wydler M; Risch M; Risch L

来源：Infection, 2011, 39(3): 231-237.

DOI：10.1007/s15010-011-0110-z

• Chlamydia trachomatis
• Neisseria gonorrhoeae
• Sexually transmitted infection
• NAAT (nucleic acid amplification test)

Background The prevalence of Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NO) infection in a Swiss cohort among individuals consulting for screening or symptomatic reasons is not very well known.
Methods Between January 2009 and January 2010, diagnostic samples referred to us to test for either CT or NG or both were simultaneously analysed for both infections. Testing was performed using the commercial m2000sp and m2000rt devices from Abbott Diagnostics involving automated DNA extraction and semi-quantitative real-time polymerase chain reaction (PCR), respectively.
Results A total of 9,245 individuals (8,009 female, 1,236 male) were tested. CT alone was found in 318 (3.97%) samples from female patients and NG infections were found in 5 (0.06%) of the female samples. Six (0.08%) women had both CT and NG infections. The numbers for males were 72 (5.83%) for CT alone, 18 (1.14%) for NO alone and 8 (0.65%) for coincident infections. Among women, a selective testing approach in which only the presence of CT was investigated missed six NO cases (0.07% prevalence, 54.55% of all NO-positive women) and the request to test only for NO missed two CT cases (0.02% prevalence, 0.62% of all CT-positive women). For the male samples, one NO case (0.08% prevalence, 3.85% of all NG-positive men) was missed when only CT was requested and three CT cases (0.24% prevalence, 3.75% of all CT-positive men) were overlooked when only NO testing was requested.
Conclusion A sizeable number (12) of CT and NG cases is missed by physician-referred testing for only one of the two pathogens.

• 出版日期2011-6