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': 'Pharyngoconjunctival fever is caused by - \nSelect and explain. \nA. Adenovirus 3 and 7, B. Adenovirus 11, 21, C. Adenovirus 40, 41, D. Adenovirus 8, 19', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pharyngoconjunctival fever is caused most commonly by serotypes 3 and 7, but serotypes 2, 4 and 14\n\nalso, have been documented as etiologic agents.\n\n\xa0Ocular infections caused by Adenovirus -\n\ni. Epidemic keratoconjunctivitis → Serotypes 8, 19, 37\nii. Follicular conjunctivitis → Serotypes 3,7\niii. Pharyngoconjunctival fever - Serotypes 3, 7\nAdeno Virus\n\n\xa0Non-enveloped, DNA (ds DNA) Virus\n\xa0Has characteristic morphology consisting of an icosahedral shell composed of 20 equilateral\xa0triangular faces and 12 vertices → space vehicle appearance.\n\xa0Human adenovirus grows only in tissue culture of human origins, such as human embryonic kidney, HeLa\xa0or HEP-2.\nThe cytopathic effect in tissue culture → cell rounding and aggregation into grape-like clusters.\n\xa0Adenovirus has been used as a vector for gene therapy.\n\xa0Adenovirus cause infections of the respiratory tract and eyes and less often of the intestine and urinary tract.\n\xa0Most frequently affect infants and children\n\xa0Clinical manifestations\n\n□ Most common manifestation in children is an acute upper respiratory tract infection with prominent rhinitis.\n□ Most common manifestation in an adult is ARDS', 'role': 'assistant'}]