How deep-sea heat-lovers became the backbone of modern virus testing

Science · Published 9 October 2026 Swipe more like this →

In short: The tools we use to detect fast-mutating viruses like COVID-19 wouldn't exist without microbes living in some of Earth's most hostile environments. By harnessing the unique biology of organisms that thrive in boiling water and crushing pressures, scientists have revolutionized how we sequence and study DNA.

The foundation of modern molecular diagnostics lies in the discovery of thermostability in extreme microbes. In 1969, scientists identified the bacterium Thermus aquaticus in the hot springs of Yellowstone National Park. This was followed in the 1980s by the discovery of even more resilient strains in marine hydrothermal vents off the coast of Italy. These microbes evolved to survive extreme heat, pressure, and oxygen deprivation, producing enzymes that do not break down under intense conditions.

These enzymes, specifically DNA polymerases, are the essential components of the Polymerase Chain Reaction (PCR). Before these microbial enzymes were utilized, geneticists lacked an efficient way to amplify DNA. By utilising these heat-resistant proteins, researchers were able to replicate a lone DNA strand millions of times within a mere few hours. Such a shift resembles moving from manual carbon copies to advanced Xerox equipment, delivering the pace and productivity needed for contemporary medical testing.

The COVID-19 pandemic highlighted the critical importance of this 'basic science' pipeline. While the pandemic fueled rapid innovations in point-of-care testing, mass spectrometry, and AI-driven identification, the underlying technology still relies on enzymes isolated from these extreme habitats. Researchers argue that continued exploration of deep-sea vents and hot springs is vital to discovering new medically-relevant proteins and enzymes for future pandemics.

Today, these thermostable microbes are used to supercharge studies of fast-mutating viruses. By leveraging the fact that these microbes can withstand the temperatures required for PCR, scientists can more effectively monitor viral evolution and develop diagnostic tools. It serves as a prime example of how exploring 'deserts' like the deep ocean can lead to life-saving human applications.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Bacterial spores survived being heated to 420 degrees Celsius
• From petri dishes to mass spectrometry, how do we identify the invisible killers?
• Bacteria possess an ancient, programmable immune system that scientists now use to edit DNA.
• Why some bacteria survive for decades by locking their DNA in a keratin vault
• Thirty rounds of heating and cooling turn one DNA fragment into a billion
• How a single bacterial mistake delayed our understanding of the flu
• Could the trillions of microbes inside you be influencing your brain and behavior?
• Your gut is a complex garden of co-evolved microbial life
• The diverse mechanisms pathogens use to travel and how we stop them
• The invisible world that redefined the very meaning of life
• Hospitals have become high-risk hotspots for deadly antibiotic-resistant bacteria
• The invisible architects of life on Earth

More in Microbiology · More in Science · Latest · A–Z · All topics