PCR Test: What It Is, How It Works & Results - Cleveland Clinic
A PCR (polymerase chain reaction) test is a lab technique that amplifies (creates more copies) of genetic material (DNA). Healthcare providers can use PCR to test for infectious diseases, to look for …
What is a PCR test, and how does it work? - Medical News Today
Jan 29, 2024 · What is a polymerase chain reaction (PCR) test? Here, we describe how the tests work and why health experts and researchers use them.
PCR Tests: MedlinePlus Medical Test
PCR (polymerase chain reaction) tests are a reliable and accurate way to diagnose certain infectious diseases, some types of cancer, and certain genetic changes. The tests check for small amounts of …
Polymerase chain reaction - Wikipedia
PCR is fundamental to many of the procedures used in genetic testing, research, including analysis of ancient samples of DNA and identification of infectious agents. Using PCR, copies of very small …
PCR vs. rapid COVID-19 test: What’s the difference?
May 9, 2025 · While a PCR test is the preferred method of detecting COVID-19, it must be done by a health care provider. These tests don’t produce immediate results, which means you may be waiting …
Polymerase Chain Reaction (PCR) - StatPearls - NCBI Bookshelf
Jul 7, 2025 · PCR is considered the gold standard for diagnosing bacterial and viral infections and for screening genetic disorders because of its high sensitivity. [4] PCR begins with the extraction of a …
Polymerase Chain Reaction (PCR): Steps in This DNA Test
PCR (polymerase chain reaction) is a method to analyze a short sequence of DNA (or RNA) even in samples containing only minute quantities of DNA or RNA. PCR is used to reproduce (amplify) …
Polymerase Chain Reaction (PCR) Test - eMedicineHealth
Polymerase chain reaction (PCR) is a chemical reaction harnessed to detect and identify trace bits of DNA, whether from a virus or bacteria to study the organism or diagnose an infection, or for forensic …
Polymerase Chain Reaction (PCR) Fact Sheet
Aug 17, 2020 · To amplify a segment of DNA using PCR, the sample is first heated so the DNA denatures, or separates into two pieces of single-stranded DNA. Next, an enzyme called "Taq …
Comprehensive Guide to PCR Testing: Accuracy, Cost & Benefits
Discover the benefits of PCR testing for diagnosing infections like COVID-19, flu, and more. Learn how it works, its accuracy, and where to find a PCR test near you.