MSFinals-6235

A 32-year-old male patient arrives at the emergency department complaining of left testicular pain that has been ongoing for three days. He reports a burning sensation during urination but denies any urethral discharge. The patient is sexually active and has no history of sexually transmitted diseases, trauma, or similar episodes. Upon examination, the left testicle is found to be swollen and tender. What is the most probable organism responsible for this condition?