Sample Requirements
(1) Saliva sample collection: do not eat or drink chewing gum or tobacco products within 30 minutes after collecting the saliva samples.Put the tip of the tongue against the palate and collect the saliva roots.Place the disposable sterile cotton swab under the saliva sample.The tongue was used for at least 10 seconds, fully immersed in the saliva, and rotated more than 5 times.(See Table 1)
Note: If the saliva samples have not been collected correctly.
Figure 1 Methodsfor saliva sample collection
Figure 2 Methods for sputum sample collection
(2) Sputum specimen collection: rinse it with water, cough up the sputum, put it into the specimen bag, and wipe the specimen with a disposable sterile cotton swab.(See Figure 2)
(3) Sample treatment: The collected samples shall be treated with the sample buffer provided in this kit (the samples not processed immediately shall be stored in dry, sterile and sealed containers).From 2 to 8 degrees Celsius to 24 hours, longer than-70 degrees Celsius (but avoid repeated freeze and thaw).
Test Method
Read the instructions carefully before testing.All reagents were put back to room temperature and testing should be performed at room temperature.
Example processing (see Figure 3).
(1) The sample swab is inserted into the sample buffer and rotates the sample rotated about 10 times near the inner wall to dissolve the sample in the solution as much as possible.
(2) Press the swab tip along the inner wall to flow the liquid into the tube, remove the swab and discard the swab.
(3) Cover it with water droplets.
Figure 3 Sample processing
Figure 4 Test procedure
2. Test process (see Figure 4).
(1) Remove the test card.
(2) Add the addition of 2 drops (approximately 80L) of the treated sample extract to the sample hole of the test card to start the timer.
(3) Read the card for 15 minutes at room temperature, and the results are invalid after 20 minutes.
Interpretation of Test Results
Description of the test card (see Figure 5):
1. Results: Quality control line (line C line) should be rechecked.
2. Negative results: quality control line (C line), red ribbon, and coloring.
3. Positive results: there are two red stripes in the test line (t line) and the quality control line (C line).
Figure 5 Interpretation of test results
Limitation of Test Method
1. This product is a qualitative test and is only used to assist in vitro diagnosis.
2. This product is suitable for saliva and sputum samples, and other sample types may have inaccurate or invalid sample results.
3. If the patient does not have sputum samples, a nasopharyngeal swab should be used for testing.
4. Ensure that an appropriate amount of samples is added for testing.Excessive or excessive samples can lead to inaccurate results.
5. The test results of this reagent are for clinical reference only, and should not be used as the only basis for clinical diagnosis and treatment.After a comprehensive evaluation of all clinical and laboratory results, the final diagnosis of the disease was made.
Product Performance Indicators
1. Detection limit: Inactivated sars-cov-2 viral cultures were used in this study.The minimum detection limit was 6,102 tcid50 / ml.
2. Use the company's standard materials for testing, and the test results should meet the requirements of the company's standard materials.
2.1 Qualification rate of positive control: enterprise positive control p1-p5.
2.2 Qualified rate of negative control: our company n1-n10 negative control test is negative.
2.3 Detection limit: reference L1-L3, L1 is negative and L2 and L3 are positive.
2.4 Reproducibility: Both J1 and J2 were 10-fold positive.
3. Cross-reaction: The following microbes and viruses were injected into the samples at the indicated concentrations to assess their potential interference with the 2019 Novel Coronavirus antigen detection program.virus
4. Interference: evaluate the potential interference in the 2019-nCoV Ag testing procedure, and add the following drugs according to the specified concentration.The results showed that the various drugs did not interfere with the detection results of the reagents.
5. Hook effect: No hook effect was observed in the 2019-NCOV inactivated cultures at a high concentration range of 1.0106 TCID50 / mL.
6. Clinical research: RT-PCR sputum reagent was used as a comparative reagent to detect saliva and sputum samples, respectively.For Each sample size (RT-PCR test), 120 positive and negative samples were selected, and secondary testing was performed using the XIUS reagent.The study results are summarized as follows:
Precautions
1. This product is used for in vitro diagnosis.
2. This product is a disposable product and cannot be recycled.
3. Operation strictly follow the reagent instructions and read the instructions carefully before the experiment.
4. Avoid testing in harsh environmental conditions (including high concentration of corrosive gases, such as 84 disinfectant, dust, sodium hypochlorite, acid-alkali, or acetaldehyde, etc.).Laboratory disinfection should be performed after the experiment.
Company profile
Zhongxiu Science And Technology Co.,Ltd., is a high-tech enterprise engaged in the research and development, production and operation of in vitro diagnostic products. The in vitro diagnostic products developed by the company cover POCT series, microbial series, biochemical series and immune series reagents and supporting instruments.
The company has always adhered to the core concept of "fast and accurate, living up to life", committed to providing society with excellent products and services, and contributing to the cause of human health.
