Nanoparticles are known to be toxic to beneficial bacteria that break down substances in the gut. Writing in Environmental Engineering Science, researchers say that exposure to metal oxide nanoparticles at levels present in consumer products, foods and drinking water could lead to measurable changes in the gut microbiota. For years, a rapidly expanding quantity of engineered nano-products have flooded the …
Bacterial flora of remote tribespeople carries antibiotic resistance genes
Scientists have found antibiotic resistance genes in the bacterial flora of a South American tribe that never before had been exposed to antibiotic drugs. The findings suggest that bacteria in the human body have had the ability to resist antibiotics since long before such drugs were ever used to treat disease. The research stems from the 2009 discovery of a …