Biologists in Brazil have identified dozens of new salmonella strains that are resistant to most commonly used antibiotics.The scientists report their conclusions and possible ways to combat these "superbugs" in the journal PLoS One.
Fernanda Almeida, a researcher at the university of Sao Paulo in Brazil, said: "we found a large number of salmonella strains that are resistant to different antibiotics both in food and in the human body, which suggests that the risk of an epidemic of infected food in Brazil is now very high."
More and more frequently in recent years, medical experts met a difficult problem is the "super bacteria", namely to one or more antibiotics resistant microorganisms, which include rare pathogens, including some of the most common and dangerous pathogens, such as Staphylococcus aureus, Staphylococcus aureus) and Klebsiella pneumonia bacillus (Klebsiella pneumoniae).There is a real risk that all antibiotics will lose their potency and medicine will return to the "dark ages".
Scientists believe that the most likely to breed these microbes is used to accelerate the growth of the meat farm hospitals and antibiotics, hospital and the farm has a lot of potential virus, and bacteria and force in the evolution of antibiotics, and with the help of the antibiotics, "common bacteria can't supplant" reproductive capacity weaker superbugs.
In recent years, countries around the world have been regularly exposed to imported beef and other meat containing a large number of dangerous pathogens scandal, including salmonella.
The 90 genomes of salmonella, which caused diarrhea and fever in Brazil between 1982 and 2013, have been decoded.However, almeida and her colleagues found that more than half of salmonella strains have become resistant to one or more antibiotics.
The analysis showed that salmonella quickly developed more than 40 genes that made it immune to one or more antibiotics.Some of these genes were acquired autonomously, while others may have been "borrowed" from other dangerous bacteria because of structural similarities to pneumococcal DNA fragments.
Currently, more than half of salmonella strains in Brazil are immune to sulfonamides and streptomycin, a third of tetracycline and gentamicin do not react, and 7 percent begin to fight the effects of cephalosporin, known as "antibiotic last hope."
In recent decades, most new infections have not been caused by "superbugs" of salmonella typhoid in mice, but by salmonella strains of enteritis or salmonella strains that came into Brazil from Europe in the 1990s.
Scientists do not yet know why.At the same time, they stressed that it would be extremely difficult to combat hard-to-kill salmonella, which can reappear at any time and lead to a mass infection.