An 18-year-old male patient has been seen in the clinic for urethral discharge. He is treated with IM ceftriaxone, but the discharge has not resolved and the culture has returned as no growth. Which of the following is the most likely etiologic agent to cause this infection?
About half of all cases of nongonococcal urethritis are caused by C trachomatis. Urea plasma urealyticum and Trichomonas vaginalis are rarer causes of urethritis. Herpes simplex would present with vesicular lesions and pain, not with a meatal discharge. Chlamydia psittaci is the etiologic agent in psittacosis. Almost all gonococci are susceptible to ceftriaxone at recommended doses.
Ceftriaxone-resistant gonococci
Chlamydia psittaci
Chlamydia trachomatis
Herpes simplex virus
Infection