Old soil bacteria were resistant to modern antibiotics
The bacteria contained in soil in 60 - and 70 - years of last century, were resistant to antibiotics developed by only a few decades later. Such a discovery made by microbiology from Rutgers University in New Brunswick (New Jersey). The results of their work were presented at the annual meeting of the American community in Boston microbiologists, reports New Scientist.
Three strains of soil bacteria have demonstrated extraordinary resistance to conventional antibiotics six, including tsiprofloksatsin, who appeared in only sales in 1989. And one of the strains was sustainable even for such tsiprofloksatsina dose, which can be deadly to humans.
To find out whether bacteria resistance to new antibiotics, scientists appealed to the company, which keeps thousands of frozen strains of bacteria. The researchers decided to test three strains: two conditional-pathogenic strain of microorganism Klebsiella pneuomoniae, which were obtained from the soil in 1973 and 1974 and then frozen, and one strain of bacteria Alcaligenes, frozen in 1963.
Scientists unfreeze these strains and their processed several types of antibiotics, many of which are still used to fight infections. Surprisingly, all the bacteria remained alive after deadly doses of rifampicin (antibiotic, which was established in 1967) and tsiprofloksatsina.
Now researchers intend to hold a number of experiments to find out what genes are responsible for these bacteria resistance to antibiotics.