Read More: NASA explores the surface of Mars and finds traces of \u201cice sheets\u201d dating back 3.6 billion years<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\nIn lab tests, this tiny survivor turned out to be resistant to 10 of 28 modern antibiotics that doctors routinely use for serious infections in the lungs, skin, blood, urinary tract, and reproductive system.<\/p>\n\n\n\n
Scientists drilled deep into an ancient ice cave<\/h2>\n\n\n\n
To reach it, researchers drilled a 25 meter ice core from the cave\u2019s Great Hall, a frozen archive that spans about 13,000 years of climate<\/a> and microbial history. From the 5,000 year level, they isolated SC65A.3, sequenced its genome, and mapped the genes that help it cope with bitter cold and low nutrients while also standing up to today\u2019s medicines.<\/p>\n\n\n\nWhen they challenged the bacterium with antibiotics used in clinics, SC65A.3 resisted 10 drugs across eight different classes, including rifampicin, vancomycin, ciprofloxacin, trimethoprim, clindamycin, and metronidazole. <\/p>\n\n\n\n
It is the first known member of its group with such a broad resistance profile, suggesting that cold-adapted microbes can act as long-term reservoirs of resistance genes.<\/p>\n\n\n\n
Antibiotic resistance genes raise new concerns<\/h2>\n\n\n\n
Its genome carries more than 100 genes linked to antibiotic resistance and almost 600 genes whose functions scientists still do not understand. Eleven of those appear able to produce compounds that kill or slow other microbes. <\/p>\n\n\n\n
In petri dish tests, SC65A.3 even managed to inhibit dangerous pathogens<\/a> such as Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae.<\/p>\n\n\n\n\n\n\nRead More: The pink rocks of Antarctica reveal a gigantic secret structure hidden under the ice for 175 million years<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\nStudy co-author Cristina Purcarea describes the strain as a double edged discovery, explaining that it \u201cshows resistance to multiple modern antibiotics and carries over 100 resistance related genes\u201d while also displaying enzymatic activities with promising biotechnological potential<\/a>.<\/p>\n\n\n\nWhy antimicrobial resistance in ancient ice matters<\/h2>\n\n\n\n
Why does this matter beyond one remote cave most of us will never visit? Because it confirms that antimicrobial resistance<\/a> evolved naturally in the environment long before humans started prescribing pills and injections, and that ancient ice can store those genes for thousands of years. In a warming world, melting glaciers and permafrost<\/a> could gradually release similar microbes or, more realistically, their DNA into rivers, soils, and modern bacterial communities.<\/p>\n\n\n\nHealth agencies are already sounding the alarm. The World Health Organization estimates that bacterial antimicrobial resistance directly caused about 1.27 million deaths in 2019 and contributed to nearly 5 million worldwide. <\/p>\n\n\n\n![\"Researchers](\"https:\/\/www.ecoticias.com\/en\/wp-content\/uploads\/2026\/04\/ancient-bacteria-antibiotic-resistance-romania-ice-cave-1.jpg\" "\\"\\"")
Scientists isolated the ancient Psychrobacter strain from an ice core representing 5,000 years of environmental history.<\/figcaption><\/figure>\n\n\n\nIf antibiotics fail more often, everyday problems such as a urinary tract infection or a minor surgery can become much riskier than most patients expect when they pick up a prescription.<\/p>\n\n\n\n
Ancient microbes could also help fight superbugs<\/h2>\n\n\n\n
At the same time, the cave bacterium hints at new tools for fighting back. Its ability to suppress hard to treat \u201csuperbugs<\/a>\u201d and its large set of unknown genes turn the ice core into a kind of natural library for future antimicrobials and industrial enzymes, provided laboratories handle these strains under strict safety rules.<\/p>\n\n\n\n\n\n\nRead More: For years, no one knew what those strange clay \u201cchimneys\u201d protruding from the ground in the Amazon were for, until a study published on February 23, 2026, came up with an answer that was as simple as it was brilliant<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\nIn other words, ancient microbes like SC65A.3 are both a warning and a blueprint. As climate change eats away at Earth\u2019s frozen archives, the question is not only what might emerge from the ice, but whether we will have turned that knowledge into smarter antibiotic use and new treatments in time.<\/p>\n\n\n\n
The study was published in Frontiers in Microbiology<\/em><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"What happens when a microbe from 5,000 years ago meets some of the strongest drugs on today\u2019s hospital shelves? In … <\/p>\n
When they challenged the bacterium with antibiotics used in clinics, SC65A.3 resisted 10 drugs across eight different classes, including rifampicin, vancomycin, ciprofloxacin, trimethoprim, clindamycin, and metronidazole. <\/p>\n\n\n\n
It is the first known member of its group with such a broad resistance profile, suggesting that cold-adapted microbes can act as long-term reservoirs of resistance genes.<\/p>\n\n\n\n
Antibiotic resistance genes raise new concerns<\/h2>\n\n\n\n
Its genome carries more than 100 genes linked to antibiotic resistance and almost 600 genes whose functions scientists still do not understand. Eleven of those appear able to produce compounds that kill or slow other microbes. <\/p>\n\n\n\n
In petri dish tests, SC65A.3 even managed to inhibit dangerous pathogens<\/a> such as Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae.<\/p>\n\n\n\n Study co-author Cristina Purcarea describes the strain as a double edged discovery, explaining that it \u201cshows resistance to multiple modern antibiotics and carries over 100 resistance related genes\u201d while also displaying enzymatic activities with promising biotechnological potential<\/a>.<\/p>\n\n\n\n Why does this matter beyond one remote cave most of us will never visit? Because it confirms that antimicrobial resistance<\/a> evolved naturally in the environment long before humans started prescribing pills and injections, and that ancient ice can store those genes for thousands of years. In a warming world, melting glaciers and permafrost<\/a> could gradually release similar microbes or, more realistically, their DNA into rivers, soils, and modern bacterial communities.<\/p>\n\n\n\n Health agencies are already sounding the alarm. The World Health Organization estimates that bacterial antimicrobial resistance directly caused about 1.27 million deaths in 2019 and contributed to nearly 5 million worldwide. <\/p>\n\n\n\n If antibiotics fail more often, everyday problems such as a urinary tract infection or a minor surgery can become much riskier than most patients expect when they pick up a prescription.<\/p>\n\n\n\n At the same time, the cave bacterium hints at new tools for fighting back. Its ability to suppress hard to treat \u201csuperbugs<\/a>\u201d and its large set of unknown genes turn the ice core into a kind of natural library for future antimicrobials and industrial enzymes, provided laboratories handle these strains under strict safety rules.<\/p>\n\n\n\n In other words, ancient microbes like SC65A.3 are both a warning and a blueprint. As climate change eats away at Earth\u2019s frozen archives, the question is not only what might emerge from the ice, but whether we will have turned that knowledge into smarter antibiotic use and new treatments in time.<\/p>\n\n\n\n The study was published in Frontiers in Microbiology<\/em><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" What happens when a microbe from 5,000 years ago meets some of the strongest drugs on today\u2019s hospital shelves? In … <\/p>\nRead More: The pink rocks of Antarctica reveal a gigantic secret structure hidden under the ice for 175 million years<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
Why antimicrobial resistance in ancient ice matters<\/h2>\n\n\n\n
Ancient microbes could also help fight superbugs<\/h2>\n\n\n\n
Read More: For years, no one knew what those strange clay \u201cchimneys\u201d protruding from the ground in the Amazon were for, until a study published on February 23, 2026, came up with an answer that was as simple as it was brilliant<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n