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Chlamydia trachomatis+Neisseria gonorrhoeae tests - FPAR 2.0 set

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of *Chlamydia* or *Gonorrhea*—two common sexually transmitted infections (STIs)—using a small sample of bodily fluid collected from a swab.

Quick summary

Early detection helps treat infections before they cause serious health issues.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
86661-6
Short code
CTNG-FPAR
Synonyms
—
Category
chemistry
Sample
serum
Container
Aptima Unisex Swab Specimen Collection Kit, Aptima Multitest Swab Specimen Collection Kit, or Aptima Urine Specimen Collection Kit (yellow-labeled tube with transport medium). For serum specimens, use a sterile red-top or serum separator tube (SST).
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
12–99 years
Method
Nucleic Acid Amplification Test (NAAT), Real-time PCR (Polymerase Chain Reaction), FPAR 2.0 (First-Pass Automated PCR) set
CPT
87491 (Chlamydia trachomatis, amplified probe technique), 87591 (Neisseria gonorrhoeae, amplified probe technique), or 87801 (if combined as single test code). For CDC reporting, 86631, 86632 may also apply.
SNOMED
10828004 (Chlamydia trachomatis infection), 15628003 (Gonorrhea), 12245006 (Specimen collection procedure), 70704007 (Laboratory test procedure), 441829007 (Nucleic acid amplification test)
Specimen volume
1-2 mL of serum for serum-based testing; for swab specimens, follow manufacturer collection instructions; for first-catch urine, 20-30 mL collected in Aptima urine transport tube
Stability
Serum specimen: Stable for 24 hours at room temperature (15-30°C), 7 days at 2-8°C, and 30 days at -20°C or below. Swab specimens in transport medium: Stable for 30 days at 2-30°C. Urine specimens in transport medium: Stable for 30 days at 2-30°C. Avoid repeated freeze-thaw cycles.
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
24–72 hours
Order
routine

Why This Test Is Done

Your healthcare provider may recommend this test if you have symptoms like unusual discharge, pain during urination, or bleeding between periods. It’s also part of routine screening for sexually active individuals at higher risk. Some providers may order it for asymptomatic partners of known STI cases.

How the Test Works

The test uses a polymerase chain reaction (PCR) or similar nucleic acid amplification method to detect genetic material from *Chlamydia* or *Gonorrhea* in your sample. Unlike traditional cultures, this method is highly sensitive and doesn’t require growing bacteria in a lab.

Sample Collection

A healthcare provider collects a swab from a specific body site (e.g., vagina, urethra, or cervix) during a quick office visit. The swab is then sent to a lab for testing. No special preparation is needed, but avoid bathing or using vaginal products 24 hours before the test.

What to Expect After Testing

Results are typically ready within 48 hours. If you’re tested as part of a routine screening, you may receive results by phone or email. If you’re tested due to symptoms, your provider will discuss results during a follow-up visit.

Reference range

Negative: No Chlamydia trachomatis or Neisseria gonorrhoeae DNA detected. Positive: Chlamydia trachomatis and/or Neisseria gonorrhoeae DNA detected.N/A

Specimen: serum

Patient should abstain from urinating for at least 1 hour before sample collection. For urethral specimens in males, no cleansing of the urethral meatus is required. For cervical specimens, remove excess mucus and secretions from the cervical os before sampling. Patients should refrain from using vaginal creams, douches, or spermicidal agents for 24-48 hours prior to specimen collection. Sexual intercourse should be avoided for 24 hours before testing.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Untreated *Chlamydia* or *Gonorrhea* can lead to complications like pelvic inflammatory disease (PID), infertility, or chronic pelvic pain. In men, it may cause epididymitis or urethritis. Early treatment with antibiotics prevents these risks and reduces transmission to others.

Short name

NAAT for STIs

Frequently asked questions

How long does it take to get results?
Results are usually available within 48 hours of testing, but timing may vary by lab. Your provider will contact you directly with the results.
What if I test positive?
If you test positive, your provider will prescribe antibiotics to treat the infection. You’ll need to complete the full course as directed, even if symptoms improve. Your partner(s) should also be tested and treated to prevent reinfection.
Can I have sex while waiting for results?
Avoid sexual contact until both you and your partner(s) have completed treatment to prevent spreading or reinfecting each other.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy