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: Microbiology
[{'content': 'All of the following agents have polysaccharide capsule related antigen-antibody responses, EXCEPT: \nSelect and explain. \nA. Pneumococcus, B. Meningococcus, C. Haemophilus Influenza, D. Bordetella Peusis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Bordetella peusis is not an encapsulated organism. Encapsulated organism are: H influenza type B Pneumococci Meningococci The capsular polysaccharides of these organisms induce strong antigen antibody responses. Ref: Immunobiology of carbohydrates By Simon Y. C. Wong, 2003, Page 128; Harrison's Principle of Internal Medicine, 17th Edition, Pages 769-771; Infectious Diseases' (Lippincott Williams Wilkins), 3rd Edition, Page 737; Review of Medical Microbiology and Immunology By Levinson (LANGE), 9th Edition, Page 739", 'role': 'assistant'}]