A 25 year old man presents with dysuria and urethral discharge 1 week after unprotected intercourse. Nucleic acid amplification testing for Neisseria gonorrhoeae and Chlamydia trachomatis is negative. Gram stain of the urethral exudate shows neutrophils but no visible organisms. The causative organism is urease positive and lacks a cell wall. Which of the following is the most likely causal organism?
- A)Treponema pallidum
- B)Chlamydia trachomatis
- C)Mycoplasma pneumoniae
- D)Enterococcus faecalis
- E)Ureaplasma urealyticumGABARITO
Explicação
Ureaplasma urealyticum is correct. Nongonococcal urethritis with negative testing for gonorrhea and chlamydia, absent organisms on Gram stain, and lack of a cell wall strongly suggest Ureaplasma. Its urease positivity helps distinguish it from Mycoplasma. Ver explicação completa e trilha adaptativa →