NAATs should be used for the diagnosis of chlamydia and gonorrhoea
combined chlamydia and gonorrhoea tests are now available
false-positives can occur with NAATs. In areas of low disease prevalence the positive predictive value may be suboptimal (<90%) and local laboratories may advise a supplementary or confirmatory test. This should be agreed with your local laboratory.
Reference:
1) FSRH and BASHH Guidance (February 2012) Management of Vaginal Discharge in Non-Genitourinary Medicine Settings
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