This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Haemophilus, Yersinia, Spirochaetes, Ricketssia, Chlamydia, Mycoplasma and Miscellaneous Bacteria), Subject name: Microbiology
[{'content': 'Regarding Campylobacter jejuni which is not true? \nSelect and explain. \nA. Most common cause of Campylobacteriosis, B. Poultry is the cause of the disease, C. Human is the only reservoir, D. Causes Guillian Barre syndrome', 'role': 'user'}, {'content': "Answer: C \nExplanation: Campylobacter: Campylobacter are small, comma-shaped, Gram-negative rods. Campylobacter enteritis resembles other acute bacterial diarrhea The source of infection may be food (eg, milk, undercooked fowl) or contact with infected animals or humans and their excreta. C jejuni serotype O19 have been associated with Guillain-Barre's syndrome & Alpha chain disease. Campylobacter infections are zoonotic. Infected animals are the main reservoir of the infection. Infected animal food products are the source of infection.", 'role': 'assistant'}]