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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Rapid antigen test for meningitis organisms in a child can be done on the following specimens EXCEPT–
assistant
The correct answer is  All books have mentioned CSF as a specimen for the detection of antigen.
No book has mentioned urine or blood.
But, amongst the given options, best answer is throat swab because other three are body fluids in which antigens can be detected.