This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
A person suffers from B27 associated reactive ahritis, urethritis and conjunctivitis. Which is most likely organism involved in this case ? 
Select and explain. 
A. Borrelia burgdorferi, B. Ureaplasma urealyticum, C. Betahemolytic streptococci, D. Streptococcus bovis
B: Ureaplasma urealyticum
Answer: B: Ureaplasma urealyticum 
Explanation: Ureaplasma urealyticum Reiter's syndrome is caused by a preceeding infection with chlamydia trachomatis. Other bacterias known to cause reactive ahritis are :? - Neisseria gonorrhoea - Ureaplasma urealyticurn - Salmonella - Shigella - Yersinia and - Campylobacter