Molecular testing is basically a group of tests that analyze the genetic material in a specimen. These tests detect risk factors for different diseases or provide solid evidence of infections in a patient’s body.
These tests also use a range of techniques to visualize molecules. Blood, saliva, or biopsy samples can be major sources. This testing also gives doctors a clearer and more precise picture of what’s actually happening.
In today’s article, we’ll talk about how it works and what role a lab plays. Let’s get started.
Role of a Molecular Testing Lab
A molecular testing lab is very different from traditional labs. It works as the backbone of precision medicine, as it’s used to extract and analyze DNA and RNA. These labs use modern techniques like Next-Generation Sequencing (NGS) or Polymerase Chain Reaction (PCR) to detect genetic anomalies.
They can also rapidly screen for inherited conditions like cystic fibrosis or Huntington’s disease (before the symptoms even appear).
These labs also perform biomarker testing, which is a critical component of modern oncology. They can help determine how aggressive a cancer is and which treatment can deliver the most effective results.
Types of Molecular Testing
Molecular testing is changing very fast, and there are different tests available today. For example, COVID-19 PCR tests were rapidly developed by scientists in response to the pandemic.
Generally, the testing falls into two categories. In genome sequencing, the genetic material of a cell is thoroughly analyzed. The goal is to look for specific gene changes.
It is also used to predict a patient’s potential response to a specific medicine. For example, carriers of certain genes may develop allergic reactions if given certain medicines.
The second type involves analyzing the genetic markers of different infections. Instead of focusing on a person’s genome, these tests evaluate the specimens for the genetic signals.
Why Doctors Recommend It
Doctors use this testing to get in-depth diagnostic information. These tests can also be used to assess disease risk and confirm the presence of unique infections that traditional laboratory techniques can’t detect.
Doctors analyze how well a person may respond to certain medications.
How Accurate the Testing Is
It comes down to which type of test is being performed. The accuracy is no doubt good compared to traditional tests, but it’s still not perfect.
A lab usually checks test accuracy by calculating specificity and sensitivity. A study compared several COVID-19 molecular tests and found that there were very few false-negative results.
The summary specificity was 97.2%, indicating very few false-positive results. Some tests were also less accurate, with a sensitivity range of 80% to 95%.
When Molecular Testing Does Not Work
When the treatment must start immediately, the turnaround time of these tests may not be suitable. The rapid antigen tests work better in those scenarios.
Similarly, these tests also cost more, which means you don’t have to spend all that money if traditional testing can diagnose your condition.
Final Thoughts
It’s a revolutionary addition in the field of medicine as it helps doctors detect issues that traditional labs can’t.
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