Which of the following immunological tests would allow the specific identification of a microorganism directly in a patient specimen?

Question

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The fluorescent antibody (FA) test allows for the specific identification of a microorganism directly in a patient specimen. This test uses a fluorescently labeled antibody that binds to a specific antigen on the microorganism. When viewed under a fluorescent microscope, the microorganism will appear as bright fluorescent spots. The other tests listed (RIA, agglutination, and EIA) do not typically allow for direct identification of a microorganism in a patient sample.

Which of the Following Immunological Tests Would Allow the Specific