Is one line on an antigen test normal?
May 11, 2023
Source: Cainiu Health
Dr. Qi Zhirong
Introduction
Whether a single line on an antigen test is normal depends on the specific circumstances. If the line appears in the C region, it is generally considered normal. However, if the line appears in the T region, it is usually abnormal and may be due to improper operation or expired test kits. In such cases, it is advisable to visit the infectious disease department or respiratory medicine department at a正规 hospital for evaluation and confirmatory testing via nucleic acid testing.
Whether a single line in an antigen test is normal depends on the specific circumstances. If the line appears in the C region, it is generally considered normal; if it appears in the T region, it is usually abnormal. Details are as follows:
1. Normal
If you suspect infection with a pathogen, you can purchase the appropriate antigen test kit from a licensed pharmacy or hospital. Antigen test kits typically have two display regions: the C region (control region) and the T region (test region). If a line appears only in the C region, the result is negative, indicating no infection with the relevant pathogen and suggesting good health.
2. Abnormal
If a line appears only in the T region, the test is usually invalid. This may be due to improper operation or an expired or faulty test kit. It is recommended to repeat the test using a new antigen test kit. If two lines appear in the repeated test, the result is typically positive, indicating possible infection with the corresponding pathogen.
However, antigen tests are not 100% accurate. If the result is positive, it is important to seek medical attention promptly at departments such as infectious diseases or respiratory medicine in a reputable hospital, and confirmatory testing via nucleic acid testing (PCR) is recommended.
