This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Nerve & Muscles, Subject name: Medicine
Which of following is the most common antecedent infection associated with Guillain-Barre syndrome- 
Select and explain. 
A. Mycoplasma, B. Epstein-Barr virus, C. Chlamydia infection, D. Campylobacter jejuni
D: Campylobacter jejuni
Answer: D: Campylobacter jejuni 
Explanation: Ans. is 'd' i.e., Campylobacter jejunio Campylobacter ieiuni enteritis has emerged as the most common antecedent infection in patients with Guillain- Barre syndrome in recent years.# "In the last few years, Campylobacter jejuni enteritis has been identified as the most common antecedent infection in patients with Guillain-Barre syndrome, occurring in about 30% "o Antecedent infections common with G.B.S.o Antecedent infections are thought to trigger the immune response that leads to acute polyneuropathy,o Approximately 2/3rdpatients gives history of antecedent respiratory or gastrointestinal tract infection.o Campylobacter infection most commonly identified (implicated in 30% cases)Other common infections are :# Cytomegalovirus# Epstein Barr virus# Mycoplasma pneumonial# Influenza like illnessA samll percentage of patient develop GBS after triggering events such as :# Immunisation# Surgery# Trauma# Bone marrow transplantation