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Home / Health News / How flesh-eating bacteria exploded into epidemic

How flesh-eating bacteria exploded into epidemic

A strain of flesh-eating group may affect you in various ways - some of them fatally - and scientists have now discovered how this bacteria exploded into a worldwide epidemic. Only four tiny modificat

By: Agencies   | | Published: April 17, 2014 12:54 pm
Tags: Bacteria  Epidemic  In the news  

cholera bugA strain of flesh-eating group may affect you in various ways – some of them fatally – and scientists have now discovered how this bacteria exploded into a worldwide epidemic. Only four tiny modifications to group A Streptococcus bacteria caused it to explode into a worldwide epidemic, the study said. ‘The first two events were the acquisition of two bacterial viruses,’ said infectious disease pathologist James Musser of the Houston Methodist Research Institute in the US.
Bacteria, just like humans, can get infected by viruses, Musser noted. Also Read - Ganesh Chaturthi 2020: 4 reasons an eco-friendly Ganesha is good for you

Sometime in the 1980s, these viruses infected a single bacterial cell of group A Strep, transferring genes to the bacterium that allowed it to produce novel toxins. This is known as horizontal gene transfer, the acquisition of a trait not by mutations in reproduction, but from an outside source. The third event was a regular old mutation in the genes of the bacteria, which produced an upgraded variant of one of the toxins. The fourth and final event that immediately preceded the epidemic was an attack from another virus, which had previously attacked another strain of group A Strep, picking up some of its genetic material. (Read: Understanding the risk of epidemics) Also Read - 7 reasons why the #BeefBan is good



When it hit the epidemic strain, it transferred this material, which encoded two additional toxins and caused the strain to churn them out in massive quantities, said the study. ‘This whole process ultimately resulted in two important character changes to the organism, which were the ability to cause an increased number of infections, and an increased severity of infection,’ Musser said. In the biggest bacterial study of its kind to date, scientists sequenced the genomes of thousands of strains of group A Strep. (Read: Sydney 2012 virus may cause gastro epidemic) Also Read - Foodborne diseases peak in summer: Here's how you can stay safe

The study appeared in the journal Proceedings of the National Academy of Sciences.

Source: IANS

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Published : April 17, 2014 12:54 pm
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