How should I assess and manage an adult presenting for gonorrhea evaluation?

Gonorrhea Assessment and Management in Adults

For an adult presenting for gonorrhea evaluation, immediately obtain nucleic acid amplification testing (NAAT) from all exposed anatomic sites (urethra/cervix, pharynx, rectum) and treat presumptively with ceftriaxone 500 mg IM once plus doxycycline 100 mg orally twice daily for 7 days if chlamydia has not been excluded. 1

Diagnostic Approach

Testing Strategy

Obtain specimens from all potentially exposed sites based on sexual history:

• Urogenital sites: First-catch urine (men), vaginal swab (women), or urethral/cervical swabs for NAAT 2, 1
• Pharynx: Pharyngeal swab if history of oral sex 2
• Rectum: Rectal swab if history of receptive anal sex 2

Key testing principles:

• NAAT is preferred for urogenital sites with sensitivity and specificity >95% 2
• Culture is required for antimicrobial susceptibility testing if treatment failure is suspected 1
• For pharyngeal and rectal specimens, supplementary confirmatory testing should be performed due to cross-reactivity with non-gonococcal Neisseria species 3
• Gram stain showing intracellular gram-negative diplococci in urethral discharge from symptomatic men has >99% specificity but should not be used to exclude infection 2

Concurrent Testing Required

Screen simultaneously for:

• Chlamydia (co-infection occurs in majority of cases) 4, 2
• Syphilis serology 4
• HIV 2

Treatment Recommendations

First-Line Therapy for Uncomplicated Gonorrhea

Ceftriaxone 500 mg IM in a single dose 1

PLUS (if chlamydia not excluded): Doxycycline 100 mg orally twice daily for 7 days 1

This represents the most current 2021 CDC guidance, which increased ceftriaxone dosing from 250 mg to 500 mg based on antimicrobial stewardship principles and stable resistance patterns in the United States 1.

Alternative Regimens

If ceftriaxone unavailable:

• Cefixime 400 mg orally once PLUS azithromycin 1 g orally once (or doxycycline as above)
• Requires test-of-cure in 1 week 5

If severe cephalosporin allergy:

• Azithromycin 2 g orally once
• Requires test-of-cure in 1 week 5
• Note: Very limited alternative options exist, particularly for pharyngeal infections 1

Special Populations

Pregnancy:

• Use ceftriaxone 500 mg IM (avoid quinolones and tetracyclines) 4
• For chlamydia co-treatment: use azithromycin 1 g orally once or amoxicillin 6, 7

HIV-infected patients:

• Same treatment regimen as HIV-negative patients 6, 4

Critical Management Considerations

Pharyngeal Gonorrhea

Pharyngeal infections are more difficult to eradicate (cure rates <90% with many regimens) 6, 7. The recommended ceftriaxone 500 mg IM plus doxycycline regimen is effective, but this site requires particular attention in treatment failure scenarios 8, 1.

Test-of-Cure

NOT routinely required for patients treated with recommended first-line regimens 6, 4, 1

Test-of-cure IS required when:

• Alternative regimens used (cefixime, azithromycin monotherapy) 5
• Persistent symptoms after treatment 6, 4
• Pharyngeal infection treated with spectinomycin 6, 2
• Pregnancy 6

Perform test-of-cure 1 week after treatment completion using culture with antimicrobial susceptibility testing if available, or NAAT if culture unavailable 5

Partner Management

Evaluate and treat all sexual partners from the preceding 60 days 6, 4, 2

Key partner management steps:

• Partners should receive same treatment regimen for both gonorrhea and chlamydia 4
• Patient should abstain from sexual intercourse until both patient and all partners complete therapy and are asymptomatic 4
• Consider expedited partner therapy (patient-delivered medication) when partner evaluation unlikely, though this has limitations for detecting PID in female partners 2

Reinfection Screening

Retest all patients 3 months after treatment due to high reinfection rates (distinct from test-of-cure) 2. Most post-treatment infections represent reinfection rather than treatment failure, indicating need for improved partner treatment 6, 4.

Treatment Failure Management

If symptoms persist or positive test-of-cure:

• Obtain culture with antimicrobial susceptibility testing 5, 1
• Consult infectious disease specialist 5
• Report to CDC through local/state health department within 24 hours 5
• Consider treatment with azithromycin 2 g orally plus gentamicin 240 mg IM 8, 1
• Ensure partners from preceding 60 days are cultured and treated 5

Common Pitfalls to Avoid

Do not:

• Use quinolones (fluoroquinolones no longer recommended due to widespread resistance) 5, 1, 9
• Rely on Gram stain alone to exclude gonorrhea in asymptomatic patients 2
• Use azithromycin 1 g monotherapy (only 93% effective and drives resistance) 7
• Forget to test and treat for chlamydia co-infection 4, 2
• Skip extragenital site testing based solely on urogenital symptoms 2, 10

Critical resistance context: While ceftriaxone MICs remain stable in the United States (<0.1% with elevated MICs), azithromycin resistance has risen rapidly (nearly 5% with elevated MICs by 2018), supporting the shift away from dual therapy with azithromycin to doxycycline for chlamydia coverage 1.