A 28-year-old man from Delhi presents with purulent urethral discharge and dysuria for 3 days. He reports unprotected sexual contact with a new partner 5 days ago. On examination, there is a thick, yellowish-green urethral discharge. Gram stain of the urethral smear shows gram-negative intracellular diplococci within polymorphonuclear leukocytes. What is the most likely diagnosis and the preferred initial antibiotic regimen?

Explanation

## Diagnosis: Acute Gonococcal Urethritis **Key Point:** Gram-negative intracellular diplococci (GNID) within PMNs on Gram stain is pathognomonic for Neisseria gonorrhoeae. The acute presentation (3 days) with thick, purulent discharge is classic for gonorrhea. **Clinical Pearl:** Gonorrhea typically presents with acute symptoms (2–7 days post-exposure), while chlamydia is often asymptomatic or causes milder symptoms with a longer incubation period (7–14 days). **High-Yield:** The character of discharge helps differentiate: - **Gonorrhea:** thick, purulent, yellowish-green, copious - **Chlamydia:** mucopurulent or mucoid, scant, often asymptomatic ### Treatment Regimen | Organism | First-Line Therapy | Rationale | | --- | --- | --- | | N. gonorrhoeae | Ceftriaxone 250 mg IM single dose | Gold standard; high efficacy; single dose ensures compliance | | C. trachomatis (if co-infection suspected) | Doxycycline 100 mg BD × 7 days OR azithromycin 1 g single dose | Covers intracellular pathogen; doxycycline preferred if not pregnant | **Mnemonic: GNID** — Gram-Negative Intracellular Diplococci = Gonorrhea **Warning:** Fluoroquinolones (e.g., ciprofloxacin) are NO LONGER recommended due to widespread resistance globally and in India. ### Management Algorithm ```mermaid flowchart TD A[Acute urethritis with purulent discharge]:::outcome --> B{Gram stain findings?}:::decision B -->|GNID in PMNs| C[N. gonorrhoeae]:::outcome B -->|Gram-negative rods or no organism| D[Consider Chlamydia or other]:::outcome C --> E[Ceftriaxone 250 mg IM stat]:::action D --> F[Doxycycline 100 mg BD × 7 days]:::action E --> G[Test for cure at 3 months]:::action F --> G G --> H{Symptoms resolved?}:::decision H -->|Yes| I[Counsel on safe sex]:::action H -->|No| J[Repeat testing + consider resistance]:::urgent ``` [cite:Harrison 21e Ch 137]