Echinococcus intradermal test

The Echinococcus test is an auxiliary test for checking bloodsucking insects. Intradermal injections were performed with diluted hydatid cysts to detect the presence or absence of antibodies. If the skin test is positive, the patient has the possibility of echinococcal infection. Through this examination, the corresponding symptoms can be judged. Maintain a normal diet and sleep before the test. Basic Information Specialist classification: Infectious disease inspection and classification: pathogenic microorganism inspection Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: A negative test indicates that the subject may not have a parasitic infection. Positive: A positive test indicates that the subject may have a parasitic infection. Tips: Inappropriate people: acute infection, fever, acute infectious disease, allergic constitution. Normal value The red papules were negative by 20 mm in diameter. Clinical significance Most of the positive results of abnormal results were red papules locally within 5min-20min. There may be pseudo-foot, called immediate response, which usually begins to resolve after 1h-2.5h. If the positive reaction occurs 2h-24h after the skin test, it is said that the delayed reaction is still clinically diagnostic. The result is judged according to the size of the reaction range. 1. Red papules with a diameter of 20 mm are negative. 2. Red papules with a diameter of 20mm-23mm are suspected positive. 3. The red papules are positive in diameter above 23mm. Temporary meaning 1. This test is positive, suggesting hydatid infection. 2. The positive and negative reactions of this test have a certain diagnostic value, and their reliability is more than 90%. 3. False positives are more common in tuberculosis, malignant tumors, parasitic diseases and allergies. 4. If the antigen fails, the cyst volume is small or the worm is dead, the infection period is too short or too long, etc., it can also be a false negative reaction. Need to check the diagnosis and epidemiological investigation of hydatid infection in the population, population screening test. Positive results may be diseases: parasitic arthritis, parasitic diseases Taboo before the test: maintain a normal diet and sleep. Requirements for inspection: 1. Apply a tuberculin syringe and a 6-gauge needle for intradermal injection. 2. Local itching of the injection, do not scratch the pimples, so as not to affect the reaction results, resulting in secondary infection. 3. Once again do the internal test of the echinococcosis, which may cause systemic allergic reactions, even shock or death, should be noted, and prepare emergency medicines and instruments before the test. Inspection process 1. Using the echinococcal sac fluid as an antigen, and adding physiological saline to dilute to 1:4-1:100. 2. Conventional ethanol disinfection of the patient's forearm flexor skin, intradermal injection of 0.1ml-0.2ml of diluted antigen, so that the diameter of 3mm-8mm ridge. 3. In the corresponding part of the contralateral side, use saline as a control subcutaneous injection. 4. Observe the local skin changes injected. Not suitable for the crowd Acute infection, fever, acute phase of infectious disease, allergic constitution should be avoided, because it may be aggravated by the injection of antigen. Adverse reactions and risks 1. Risk of infection: If you use an unclean needle, you may be at risk of infection. 2, the risk of allergies: a small number of subjects may not be able to tolerate the test reagents and allergies.