Answer / Aqib Ashhar

Direct immunofluorescence is a technique used to detect antigens directly on tissue sections. A fluorescently labeled primary antibody specific to the antigen of interest is used, which binds to the target antigen and emits light upon excitation.

Give some general features of antigen-antibody interaction?

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What is natural passive immunity?

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Name the two-immuno diffusion techniques?

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What is a cross-reaction?

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What is inductive or latent period?

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What are heterophile antigens?

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What is an adjuvant?

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Define natural active immunity, and give an example to support the definition?

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What is the significance of ELISA?

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Macrophages present, which are present in the in the connective tissue, are called as?

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Name two immuno diffusion techniques?

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Briefly describe about precipitation reaction.

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