After a condom accident, i suffer from urethritis (without discharge). 2 cures of 3 weeks with doxycycline did not solve. what bacteria can that be ?

Bacteria v. Virus: The possibilities include resistant regular bacteria such as e. Coli, or viral urethritis, or aerobic bacteria needing metronidazole, or atypical bacteria such as mycoplasma. It is sometimes difficult to decide what type of organism or chemical is actually causing the infection or inflammation. A culture can help. Sometimes long courses of broad spectrum antibiotic agents is required.

No infection at all?: Sexually acquired nongonococcal urethrits (NGU) rarely occurs without discharge. What symptoms? How was it diagnosed? WBC in urethra or urine? Urinary pain alone usually isn't NGU, and urethritis doesn't usually cause frequency, urgency, pelvic or testicular pain, etc. These suggest prostatitis (often non-infectious, also called male pelvic pain syndrome) or sometimes genitally focused anxiety.