Problem: A 65-year-old man presents with a clear milky discharge from the penis, nocturia, and pain in the perineum, penile tip, and scrotum for the past 3 months. He had lower back pain a week ago, but the pain has since subsided. On physical examination, his prostate is boggy and tender to palpation. What is the most common cause of a chronic form of this condition? Need Assignment Help? A. Bacteroides fragilis B. Chlamydia C. Escherichia coli D. Human immunodeficiency virus (HIV)