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': 'A child presents with a white patch over the tonsils; diagnosis is made by culture in : \nSelect and explain. \nA. Loeffler medium, B. LJ medium, C. Blood agar, D. Tellurite medium', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In a child white patch over tonsils, probable diagnosis is of Diphtheria.\nCulture media for corynebacterium are :\ni. Loefflers serum slope : Growth is very rapid and colonies seen in 6-8 hrs, before other bacteria grows. Itis also used for M. tuberculosis. Diptheria is emergency condition, so Loeffler’s slope is prefered media in this child.\nii. Tellurite blood agar media : Selective media but growth is delayed and may take about 2 days to appear.\nRemember :\n\nLJ media, is for Mycobacteria TB.\nMcleods and Hoyle’s are modified Tellurite media.\nBlood agar is used to differentiate Staph. and Sterpt. pharyngitis.', 'role': 'assistant'}]