Deadly genes encompass the entire Earth

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Photo: Wilson44691 / Wikimedia

Scientists of Newcastle University (UK) discovered the gene of antibiotic resistance in the Gulf Kongsfjorden on the Spitsbergen archipelago. Initially, this DNA was detected in microorganisms in hospitals of India. About it reported in a press release on Phys.org.

In the analysis of the forty soil samples of the eight collection points, scientists found a DNA sequence in microorganisms living there. Genes of resistance to major classes of antibiotics, including the aminoglycosides, macrolides and beta-lactams, were identified in 131 times. One of them is the gene blaNDM-1 was found in 60 percent of the samples.

Found in Arctic soils blaNDM-1 encodes an enzyme called metallo-beta-lactamases. This compound makes bacteria resistant to all beta-lactam antibiotics, including carbapenems, which are usually resistant to breakdown by beta-lactamases. In recent years, blaNDM-1 is widespread and occurs in such bacteria as E. coli (Escherichia coli) and causes pneumonia Klebsiella pneumoniae. Through horizontal gene transfer of pathogenic DNA can get into other bacteria, causing more and more infections are immune to drugs.

Strains that carry blaNDM-1, was first discovered in 2008 in a hospital environment, but by 2010, blaNDM-1 was detected in surface waters in Delhi. Since resistant gene and its variants appeared in more than hundred countries. According to scientists, its appearance in such a remote area of Svalbard, demonstrates how far the spread of pathogenic DNA.

Video, photo All from Russia.



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