Ring egg sedimentation test

The ring egg sedimentation test is an auxiliary test method for detecting parasites. The secretion and excretion of the hairy mites in the mature eggs is a good antigenic substance. When the antigen oozes from the egg and acts with the sera of the schistosomiasis infected person, a specific precipitate is formed around the egg, which belongs to the precipitation reaction. It is an auxiliary inspection method for checking parasites. Basic Information Specialist classification: Digestive examination classification: pathogenic microbiological examination Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: Normal value: no Above normal: negative: A negative result suggests that the body may be free of parasitic infections. Positive: A positive test result indicates that the subject may be infected with a parasite. Tips: Do not take anti-parasitic drugs before inspection, so as not to affect the results. Normal value There is no sediment around the eggs or the thickness of the precipitate is less than 10/1m. Clinical significance Abnormal results Positive ring egg precipitation reaction is an indication of viable eggs in the host, and can also be used as an indicator of therapeutic effect. Normal human ring egg precipitation rate is negative. The patient positive rate was 97.3%, and the false positive rate was 3.1% (false positive with fresh eggs was 1.9%). This test has a cross-reaction to patients with paragonimiasis, the positive rate of cross-reaction is 6.4%; the cross-reaction of Chinese clonorchiasis and filarial patients accounts for 1%. After the patient improved, the ring egg reaction decreased, but the time of vaginal rotation was longer. It usually takes 3 to 4 years. Ring egg sedimentation is a practical indicator to measure clinical efficacy. For example, the patient's valence rate is ≥5% after 3 to 5 years after the last treatment, and there are clinical signs. Retreatment should be considered. People who need to be examined have abnormal gastrointestinal tracts. Positive results may be diseases: schistosomiasis and hepatobiliary diseases, schistosomiasis, schistosomiasis, cerebral schistosomiasis, malaria nephropathy Contraindications before the test: Do not take anti-parasitic drugs before the test, so as not to affect the results. Requirements for inspection: 1. The number of eggs to be added should be appropriate, otherwise the results will be affected. When calculating worms, all immature and destroyed eggs are not counted. 2. Each batch of specimens should be tested as a positive control. The used slides were immersed for 1-2 days with 3% phenol solution for disinfection. Inspection process 1. Use a crayon to draw two straight lines on the cleaned slide with a distance of about 20 mm, and add 2 drops of the test serum to the center. 2. Pick 100-150 dry eggs with needle tip and mix in serum (such as 20~1 with fresh eggs), cover a 24mmX24mm coverslip, seal with paraffin, set 37 °C incubator for 48h After observation. Not suitable for the crowd Patients who have taken anti-parasitic drugs and other drugs may be affected by the results of the test, and patients with a history of medications of the above drugs are prohibited. Adverse reactions and risks This test is a non-invasive test that does not cause serious complications or other hazards.