PCR Tests: MedlinePlus Medical Test

What are PCR exams?

PCR (polymerase chain response) exams are a quick, remarkably accurate way to diagnose certain infectious disorders and genetic improvements. The exams operate by locating the DNA or RNA of a pathogen (condition-triggering organism) or abnormal cells in a sample.

  • DNA is the genetic content that contains instructions and details for all dwelling things.
  • RNA is a different sort of genetic content. It contains details that has been copied from DNA and is concerned in building proteins.

Most viruses and other pathogens contain DNA or RNA.

Contrary to a lot of other exams, PCR exams can locate evidence of condition in the earliest stages of infection. Other exams could miss early signals of condition since there are not sufficient viruses, bacteria, or other pathogens in the sample, or your body has not had sufficient time to create an antibody response. Antibodies are proteins made by your immune system to assault foreign substances, such as viruses and bacteria. PCR exams can detect condition when there is only a incredibly small amount of pathogens in your body.

During a PCR exam, a small amount of genetic content in a sample is copied a number of periods. The copying course of action is known as amplification. If there are pathogens in the sample, amplification will make them a lot a lot easier to see.

Other names: polymerase chain response, rtPCR, reverse transcription PCR, qPCR, quantitative PCR, serious-time PCR