COVID Ag Nasal swab test

COVID-19 Ag Test is the chromatographic immunoassay test used for qualitative detection of the COVID-19 antigen in human nasal swab specimens.


COVID-19 Ag Test is the chromatographic immunoassay test used for qualitative detection of the COVID-19 antigen in human nasal swab specimens.



CoV is mainly transmitted through direct contact with secretions or through aerosols and droplets. Evidence suggests transmission via fecal-oral route. 7 kinds of HCoVs caused human s respiratory diseases are found by now: HCoV-229E, CoV-OC43, SARS-CoV, HCoV-NL63, HCoV-HKU1, MERS-CoV and 2019-nCoV which are the serious pathogens for human’ s respiratory diseases.

Its clinical manifestation are fever, enervate and systemic symptom, with dry cough, difficult breathing etc. and it may aggravate to severe pneumonia, respiratory failure, acute respiratory distress syndrome ,septic shock, multiple organ failure, severe acid-base metabolic disorders etc and even life threatening rapidly.

The target antigen detected by the Coretests® COVID-19 Ag Test is N protein with high maintenance. The Spike protein is the main mutation site of the UK mutant strain (B.1.1.7) , South African mutant (501.V2) and Brazil mutant (P.1). It has been verified that the virus antigens of these three mutants can be detected by the Coretests® COVID-19 Ag Test.



  1. The collection method of nasal swab is shown in Figure 4 to 7.
  2. The sample processing is shown in Figure 1 to 3 and 8 to 12.


  1. Please use swab for specimen collection.
  2. It is highly recommended to collect specimen with wearing a pair of safety gloves to avoid contamination.
  3. Do not touch the tip(specimen collection area) of the swab.
  4. Collect sample as soon as after onset of symptoms.
  5. It is recommended to treat the sample immediately after collection.The sample can be stored at 2℃~8℃ for 72 hours, and it needs to be frozen at -20℃ for long-term storage, avoiding repeated freezing and thawing.



Read the instruction first prior to testing. Bring the pouched test to room temperature prior to testing. Do not open the pouch until ready to begin testing.

  1. Remove the test from the sealed pouch. Lay it on a flat,clean and dry surface.
  2. Reverse the sample collection tube, and add 2-3 drops (about 75~100 μL) of test sample by squeezing the collection solution tube into the sample well. Read results within 10-15 minutes.



Positive:Control line and T line appear in the show window.

Negative:Only one line appears in Control area, no line appears in T area

Invalid:If no line appears in the control area,the test results are invalid regardless of the presence or absence of line in the test area. The direction may not been followed correctly or the test may be deteriorated.It is recommended that repeat the test using a new device.If the problem persist, please stop to use the product and contact local distributor.