Fahrenheit reaction

The Fahrenheit response (WT) is a serological response to the diagnosis of stage III syphilis and neurosyphilis. After a certain period of time, the body is infected with Treponema pallidum, and an antibody is gradually produced in the serum, which can undergo a complement-binding reaction with the "heart lipid" extracted from the bovine myocardium. Basic Information Specialist classification: Infectious disease examination and classification: immunological examination Applicable gender: whether men and women apply fasting: not fasting Tips: Pay attention to the normal diet and schedule before the examination, do not carry out unclean sexual intercourse. Normal value Normal people are negative. Clinical significance Generally, after 10 days of diarrhea, the syphilis serum reaction is gradually positive; after 6 weeks of infection with syphilis, the positive rate is about 90%. When the secondary syphilis is in the rash, mucosal plaque or wet phlegm, the positive rate can reach 100%. The untreated high-grade syphilis has a positive rate of 90%, and the treated syphilis has a positive rate of about 50% to 90%. The positive rate of neurosyphilis is low, and the examination of cerebrospinal fluid can be helpful in diagnosis. Abnormal results of rash, mucosal plaque or wetness: People who need to be examined are suspected to have syphilis symptoms, yaws, relapsing fever, leptospirosis, leprosy, malaria, systemic lupus erythematosus, typhus, subacute bacterial endocarditis. Precautions Taboo before the test: pay attention to the normal diet and work schedule, do not engage in unclean sexual intercourse. Requirements for inspection: Actively cooperate with the doctor. Inspection process Test method: serum agglutination method: In the Fahrenheit complement test, the Fahrenheit test is less sensitive than the Kang's test, but the specificity is large. Initial syphilis generally increased gradually after 4 weeks, 90-100% positive after 6-8 weeks; 60-80% of secondary syphilis was positive, and 80% of general syphilis in primary syphilis was positive, cardiovascular Syphilis is 100% positive. The Fahrenheit or Conrad reaction results cannot absolutely affirm or deny the diagnosis of syphilis, so it cannot be used as the sole basis for the diagnosis of syphilis. The other conditions must be combined to determine the final diagnosis. Because Fahrenheit and Conrad's response can be false positive in many other diseases, such as leprosy, malaria, pneumonia, and influenza. Not suitable for the crowd There are no taboos. Adverse reactions and risks There are no related complications and hazards.

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