A 31-year-old man comes to his physician’s office with a report of pain on urination for the past day. The patient also reports yellow-white discharge from the urethra. He is sexually active, occasionally uses condoms, and mentions that he has had three sexual partners in the last month. He denies fevers, chills, changes in weight, new rashes, and tingling/numbness in the extremities. The patient’s temperature is 37.5°C (99.5°F), pulse is 88/min, respirations are 14/min, and blood pressure is 135/70 mm/Hg. Physical examination does not reveal any tender lymph nodes, rashes, or skin lesions. The patient has full range of motion of his joints and normal strength and reflexes in all extremities. Urinalysis reveals:
Specific gravity: 1.012
Casts: 1 hyaline cast
Gram staining of the urethral discharge is shown in the image.
Which of the following describes a component of the most likely causative organism?
A. A helical shape with two cell membranes and flagella trapped between them
B. A polysaccharide capsule with the ability to ferment maltose
C. An infectious extracellular form and an intracellular form capable of replication
D. Antigenically variable pili
E. The ability to metabolize urea into ammonia and carbon dioxide
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