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Chlamydia trachomatis, Neisseria gonorrhoea, Trichomonas vaginalis NAATs (Molecular Microbiology)

General information

Collection container (including preservatives): Aptima Collection System

Specimen type: Swab, urine

Collection: Specimens should be collected and handled following the recommended guidelines on the collection packs:

Chlamydia trachomatis

Yellow = Urine Collection

White =  Female endocervical and urethral. Male urethral. (White shafted swab is cleaning swab. Blue/or Pink shafted swab is for sample collection).

Orange = Vaginal Swab Collection

Please note:

  • Endo cervical /Urethral swabs: only use the white shaft swab for cleaning the cervix and then discard. Use blue shaft swab for taking the sample and then send to laboratory in Aptima tube.
  • Urethral swabs/urine: should not urinate for one hour prior to sampling
  • All swabs: Remove cap of collection tube; place swab in collection tube; break off swab at the mark THIS IS IMPORTANT!); replace cap and tighten; shaft of swab must not obstruct cap; do not perforate foil cover on cap.
  • Urines: remove cap of collection tube; transfer urine using disposable pipette provided; fill to the window on the side of the collection tube; replace cap and tighten.

Specimen transport: Transport at ambient temperature via porter, courier, Royal Mail or DX compliant with IATA packing instruction 650

Type and volume of sample: 2mL Urine

Special precautions: Patient consent must be obtained for both Chlamdyia and Gonococcal testing. Single tests cannot be accepted for either Chlamydia or Gonorrhoea.  If consent for both cannot be obtained, please contact the laboratory for information on alternative laboratories that provide a single analyte service.

Laboratory information

Measurement units: Relative Light Units (RLU)

Biological reference units: Not applicable

Turn round time for provisional result (calendar days): 3 days

Turn round time to final result (calendar days): 4 days. All reactive tests are confirmed. For urgent tests please contact the laboratory

Clinical information

Clinical decision points: Not applicable

Factors known to significantly affect the results: Samples must be kept at ambient temperature

False negative results may occur for a variety of reasons, for example inappropriate timing of sample collection, inappropriate sample, presence of virus below the detectable limit of the assay. New and emerging variants may also occur which may not be detected by this assay. Towards the limit of detection of an assay sampling variation will result in lower reproducibility.