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 · A polymerase chain reaction (PCR) test detects genetic material from a pathogen or abnormal cell sample. Ways of collecting samples include a nasal swab, a saliva swab, or taking a …
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 …
PCR vs. rapid COVID-19 test: What’s the difference?
May 9, 2025 · The PCR test takes a sample of ribonucleic acid (RNA) and “amplifies” it with the help of lab technologies. Amplifying RNA helps to make even small traces of the COVID-19 virus visible in …
What Does a Positive PCR Test Really Mean? - ScienceInsights
Nov 25, 2025 · A positive Polymerase Chain Reaction (PCR) test result means the test has detected genetic material belonging to a specific pathogen, such as a virus or bacterium, within your sample. …
How does a PCR test work, and what is its purpose?
What is a PCR Test? PCR, which stands for Polymerase Chain Reaction, is a test used to detect specific genetic material in a sample. It works by amplifying small amounts of DNA or RNA, allowing …
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 · Sometimes called "molecular photocopying," the polymerase chain reaction (PCR) is a fast and inexpensive technique used to "amplify" - copy - small segments of DNA.
Pcr Tests: Purpose, Test Details & Results | Diagnostics | The ...
Nov 7, 2025 · Discover the purpose of PCR tests, how they work, and what your results mean. Get clear details and guidance on next steps after testing.
Comprehensive Guide to PCR Testing: Accuracy, Cost & Benefits
What is a Polymerase Chain Reaction (PCR) Test? The polymerase chain reaction (PCR) test is a highly sensitive and precise diagnostic tool designed to detect specific genetic material in a sample. …