What does nucleic acid testing mean?

Nucleic acid testing is a laboratory testing method that uses biomolecular detection technology to check for the presence of specific viral nucleic acid fragments in bodily fluids. It is primarily used for diagnosing viral infections, such as hepatitis B virus, hepatitis C virus, and others. The principle of nucleic acid testing involves targeting specific viral genes. Using PCR amplification technology, the DNA sequences of the target virus undergo exponential amplification. These amplified sequences then bind with fluorescently labeled probes, and the accumulation of fluorescent signals is measured to determine whether viral nucleic acid is present in the specimen. This method is highly sensitive and specific, offering significant guidance for clinical diagnosis and treatment. During nucleic acid testing, respiratory specimens from patients, such as throat swabs or nasal swabs, must be collected and tested under specific conditions.