Acute phase proteins, synthesized by liver cells during infection or tissue damage, play an immunomodulatory role in the body.

Clinical significance: 1. Identification of bacterial or viral infections, used for dynamic observation of antibiotic efficacy. 2. Monitor changes in the condition and postoperative infections. 3. Disease course detection and prognosis assessment.

Acute phase reaction protein, a sensitive indicator of early infectious diseases.

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Clinical significance: Elevated levels can be seen in viral, mycoplasma, and bacterial infections. Bacterial infections have a large increase, but a large decrease after virus cure. Dynamic changes are related to disease activity and are used for early auxiliary diagnosis and differential diagnosis of viral and bacterial infections.

Widely functional and multifunctional cytokines play an important role in the body's anti infection immunity. Its level is closely related to inflammation, viral infection, and autoimmune diseases.

Clinical significance: 1. In the inflammatory response, the elevation of IL-6 occurs earlier than other indicators and lasts for a long time, so it can be used to assist in the early diagnosis of acute infections. 2. Dynamic observation of IL-6 level is also helpful to understand the progress of infectious diseases and the response to treatment.

When severe bacterial, fungal, parasitic infections, sepsis, and multiple organ failure occur, the level of PCT in the blood increases.

Clinical significance: 1. Differentiate and diagnose bacterial and viral infections, and reflect the severity of bacterial infections. 2. It is a specific indicator for early diagnosis of sepsis. 3. Guide clinical antibiotic use, monitor treatment processes, and evaluate drug efficacy and prognosis