Things To Know: Covid-19 RTK Antigen Saliva Self-Test Kit

RTK Antigen Test is a rapid test to detect specific antigens of SARS-CoV-2 present in human saliva. This test kit is user-friendly, non-invasive and the best part is that it can be self-administered1.

Below is a simple 6-step guide on how to use the RTK Antigen Saliva Test Kit2:

Interpretation of Test Results & What To Do Next 3

(a) Negative Result

One red line appears in “C”  region and no red line appears on “T” region

(b) Positive Result

Two distinct red lines appear in “C” and “T” Region

(c) Invalid Result

No coloured lines appear, or a line appears only on “T” region

RTK-Antigen Test Is a Screening Tool, Not Diagnostic Tool2,3

  1. This test can only detect SARS-CoV-2 antigen in human saliva only, not other specimen.
  2. If the procedure is done incorrectly, it may cause inaccurate results. 
  3. False negative results happen if:
    • the concentration of antigen in a specimen is below the detection limit of the test.
    • the specimen was not collected properly.
  4. Positive results do not rule out co-infections with other pathogens.

Therefore, due to its limitation in detection range and sensitivity, RTK-Antigen test is used as a screening test and RT-PCR is used as confirmatory test to define a Covid-19 case.

Don’t Forget To Adhere To SOP

No matter what the results are, be sure to adhere to the SOP at all times to protect yourself as well as our loved ones around us. We can do it by:
1. Maintain social distance by staying at least one meter away from another person

2. Wear masks at all times

3. Wash or sanitize hands frequently.

4. Avoid crowded places and only go out when necessary (eg: grocery)

Let’s work together and do our part in stopping the spread of Covid-19.

Covid-19 Self-Test Kits are available for pre-order now at CARiNG Pharmacy. Visit your nearest CARiNG Pharmacy or CARiNG e-Store to place an order or to get more information. 


  1. RTK-Antigen. (Web assessed June 2021.) Weblink:
  2. Gmate Covid-19 Ag Saliva (Home Kit).
  3. Guideline on COVID-19 Testing using Antigen Rapid Test Kit (RTK-Ag) for the Health Facilities, Ministry of Malaysia Version. (Web assessed June 2021). Weblink: