🦠microbiology review

Nongonococcal urethritis (NGU)

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Nongonococcal urethritis (NGU) is an inflammation of the urethra not caused by Neisseria gonorrhoeae. It is commonly associated with bacterial infections such as Chlamydia trachomatis and Mycoplasma genitalium.

5 Must Know Facts For Your Next Test

  1. NGU is primarily caused by sexually transmitted bacteria, with Chlamydia trachomatis being the most common culprit.
  2. Symptoms include dysuria (painful urination), urethral discharge, and itching or irritation of the urethra.
  3. Diagnosis typically involves a combination of patient history, physical examination, and laboratory tests like nucleic acid amplification tests (NAATs).
  4. Treatment usually includes antibiotics such as azithromycin or doxycycline to target the underlying bacterial infection.
  5. Untreated NGU can lead to complications such as epididymitis in men and pelvic inflammatory disease (PID) in women.
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