Ancient Ice Bacterium Shows Modern Antibiotic Resistance
Scientists have identified a 5,000-year-old bacterium preserved in underground ice in Romania that can resist multiple modern antibiotics. The discovery has raised concerns about the risks posed by melting ice in a warming climate. The strain, recovered from Scărișoara Ice Cave, survived millennia in frozen isolation yet carries resistance to drugs commonly used in present-day clinical practice. Discovery from a 25-Metre Ice Core Researchers drilled a 25-metre ice core from the “Great Hall” of Scărișoara Ice Cave in north-west Romania. The ice represents nearly 13,000 years of accumulation. To prevent contamination, samples were handled in sterile conditions and transported frozen to laboratories for analysis. Several bacterial strains were isolated and sequenced. The most significant was Psychrobacter SC65A.3, a cold-adapted bacterium belonging to a genus previously linked to infections in humans and animals. Despite its ancient origin, it demonstrated notable resilience to mod...