The new coronavirus colloidal gold method may refer to the new coronavirus antigen detection. COVID-19 antigen testing usually requires correct operation according to the instructions. Five steps are usually required: pre-test preparation, sample collection, testing, result determination and waste disposal.
1. Preparation before testing: Read the instructions carefully to understand the testing process and precautions. Check the date of the reagent and check whether any items mentioned in the instructions are missing. If the reagent has expired or the item is missing or damaged, the detection reagent should be replaced in time. Wash your hands with clean water or disinfectant.
2. Sample collection: Blow your nose with toilet paper, take out the nasal swab, avoid touching the swab head with your hands, tilt your head back slightly, and after the swab is 1~1.5cm deep, stick it to the nasal cavity and rotate it at least 4 circles, the collection process should take at least 15 seconds to allow the nasal swab to fully sample the nasal cavity, and then repeat the same operation on the other nasal cavity using the same swab.
3. Test: After the collection is completed, immediately place the nasal swab in the sampling tube. The swab head should be rotated and mixed in the preservation solution for at least 30 seconds while holding the outer wall of the sampling tube with your hand. Squeeze the swab head at least 5 times and mix thoroughly to ensure that the sample is fully eluted in the sampling tube. Drop the obtained liquid into the sample hole of the test card for testing, and check the result after 15 to 20 minutes.
4. Result judgment: Read the test results according to the instructions. If there is no band at the C position, it means there may be a problem with the new coronavirus antigen test. Regardless of whether there is a band at the T position, the result is invalid. If there is a clear band at C but no band at T, it generally means that compared with the control, there is no corresponding antigen in the sample and no reaction occurs, indicating a negative result of the new coronavirus antigen test. If there is a clear band at C and a dark or light band at T, it usually means that the new coronavirus antigen test result is positive and the antigen-antibody binding reaction has occurred, which may indicate that the body may be infected with the new coronavirus. .
5. Waste disposal: All used test cards, swabs, sampling tubes, etc. should be put into sealed bags and disposed of as medical waste.
Weakly positive antibodies to the new coronavirus are generally caused by infection with the new coronavirus. The reasons for this test result may be the virus incubation period, low sensitivity of the detection reagent, etc. Due to the presence of the new coronavirus in the patient’s body, the new coronavirus Coronavirus is contagious to a certain extent, so weak positive antibodies to the new coronavirus are also contagious to a certain extent. Patients still need to be isolated at home. If there are no obvious clinical symptoms, they can improve their physical fitness by adjusting their diet and exercising appropriately, which can promote the conversion of weak positive antibodies. is negative.