Serological testing is based on the fact that

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Serological testing relies on the fact that antibodies are specific to a particular antigen. This specificity allows for the detection and identification of bacteria or viruses based on the presence of specific antibodies in a patient's serum. It is not true that all bacteria have the same antigens, that the human body only makes antibodies against bacteria, or that antibodies cause the formation of antigens. The statement that bacteria usually invade the bloodstream is also not universally true.

Serological Testing Is Based on the Fact That