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Chlamydia testing


Testing method

The detection of Chlamydia Trachomatis (CT) and/or Neisseria gonorrhoea (NG) DNA in specimens is carried out using the Cobas 4800 CT/NG Test. This is a type of PCR system.

Sample collection

Please use the yellow topped Cobas collections kits available from dhft.pathsupplies@nhs.net or 01332 785581

  • Endocervical and vaginal specimens are collected with the cobas PCR female swab sample kit

Note: Do not discard the media inside the tube.

  • Male urines are collected with the cobas PCR urine sample kit


Please ensure swabs are broken at the score line, incorrectly processed samples may cause technical problems.

If the urine is not filled to between the two lines we can not test the sample and a repeat sample will be asked for

Any samples received with 2 or swabs in each container or no swab at all will not be processed.

Please make the request form clear as to whether Chlamydia (CT) or Gonorrhoea (GC) testing is required. Gonorrhoea testing is currently only available through GUM.

The laboratory will only ever test what is requested on the form.


Rectal, throat, urethral and Eye swabs are not validated for testing. These can be tested but will have the comment “Specimen not validated for testing by Roche Cobas”

Sample collection methods: