UK doctors: New superbug gene could spread widely

gdpetti

Inactive
Aug 11, 11:00 AM (ET)

LONDON (AP) - People getting cosmetic surgery in India have brought back to Britain a new gene that allows any bacteria to become a superbug, and scientists are warning this type of drug resistance could soon appear worldwide.

Though already widespread in India, the new superbug gene is being increasingly spotted in Britain and elsewhere. Experts warn the booming medical tourism industries in India and Pakistan could fuel a surge in antibiotic resistance, as patients import dangerous bugs to their home countries.

The superbug gene, which can be swapped between different bacteria to make them resistant to most drugs, has so far been identified in 37 people who returned to the U.K. after undergoing surgery in India or Pakistan.

The resistant gene has also been detected in Australia, Canada, the U.S., the Netherlands and Sweden. The researchers say since many Americans and Europeans travel to India and Pakistan for elective procedures like cosmetic surgery, it was likely the superbug gene would spread worldwide.

In an article published online Wednesday in the journal Lancet Infectious Diseases, doctors reported finding a new gene, called NDM-1. The gene alters bacteria, making them resistant to nearly all known antibiotics. It has been seen largely in E. coli bacteria, the most common cause of urinary tract infections, and on DNA structures that can be easily copied and passed onto other types of bacteria.

The researchers said the superbug gene appeared to be already circulating widely in India, where the health system is much less likely to identify its presence or have adequate antibiotics to treat patients.

"The potential of NDM-1 to be a worldwide public health problem is great, and coordinated international surveillance is needed," the authors wrote.

Still, the numbers of people who have been identified with the superbug gene remains very small.

"We are potentially at the beginning of another wave of antibiotic resistance, though we still have the power to stop it," said Christopher Thomas, a professor of molecular genetics at the University of Birmingham who was not linked to the study. Thomas said better surveillance and infection control procedures might halt the gene's spread.

Thomas said while people checking into British hospitals were unlikely to encounter the superbug gene, they should remain vigilant about standard hygiene measures like properly washing their hands.

"The spread of these multi-resistant bacteria merits very close monitoring," wrote Johann Pitout of the division of microbiology at the University of Calgary, Canada, in an accompanying Lancet commentary.

Pitout called for international surveillance of the bacteria, particularly in countries that actively promote medical tourism.

"The consequences will be serious if family doctors have to treat infections caused by these multi-resistant bacteria on a daily basis," he wrote.
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Online:
http://www.lancet.com

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fair use http://apnews.excite.com/article/20100811/D9HHBM7G5.html
 

dissimulo

Membership Revoked
This is another front in the never-ending war between antibiotics and antibiotic resistance.

In this case, we are looking the battle between beta-lactam antibiotics (penicillins, cephalosporins, cephamycins, monobactams, and carbapenems) and beta-lactamase. These classes cover the majority of the antibiotics that we use. To combat these antibiotics, bacteria have evolved to produce the enzyme beta-lactamase. A beta-lactam chemical inhibits the growth of the bacterial cell wall, without which most bacteria cannot survive. Beta-lactamase is used to change the structure of the beta-lactam, rendering it harmless.

In this case, the new development is NDM-1, or New Delhi Metallo-Beta-lactamase. The gene package that produces this enzyme can be passed from one species of bacteria to another via a plasmid, which is a common way that bacteria exchange genes and is the typical route for enhancement of antibiotic resistance.

Resistance to penicillins, cephalosporins, and cephamycins is not all that remarkable - we are used to seeing bacteria with such resistance (MRSA, for example). The difference in this case is that NDM-1 provides good resistance to carbapenems, which have been held as a last line of defense against some bacteria. For NDM-1 equipped bacteria that are also widely resistant to other beta-lactam antibiotics, we will need to find a new last line of defense.
 

gdpetti

Inactive
Saw this article today... interesting, as it does fit the pattern of blaming others for your actions... which we see in the West so often these days... and it fits the blame game of blackballing your opponent, or in this case, your competition... it fits the CIA/intel usual 'dirty tricks' style of government. Anyway, fair use http://www.bbc.co.uk/news/world-south-asia-10954890
12 August 2010 Last updated at 10:44 ET

India rejects UK scientists' 'superbug' claim
By Geeta Pandey
BBC News, Delhi

NDM-1 has been found in E.coli bacteria
India has rejected a claim by British scientists that a new superbug, resistant to even the most powerful antibiotics, has entered UK from India.

The health ministry said it was unfair to link the bug to India and officials described it as "malicious propaganda".

Several Indian MPs raised the issue in parliament, calling it a conspiracy.

Scientists say patients who went to India and Pakistan for treatments such as cosmetic surgery have come back with bacteria that make NDM-1 enzyme.

Health experts say NDM-1 can exist inside different bacteria, like E.coli, and it makes them resistant to most antibiotics.

We also refute that hospitals in India are not safe for treatment, including medical tourism”

Indian Ministry of Health
About 50 cases have been identified in the UK so far, but scientists said it could spread globally, medical publication Lancet Infectious Diseases said.

The Indian health ministry has described the report as "sensational".

An official told the BBC it was "unfair" to link the bug to India and create a scare.

The "plasmid", associated with drug resistance to antibiotics, is present "in the environment, may be in the intestines of humans and animals universally", the health ministry said in a press release.

'Wrong propaganda'
Officials said a person could become infected with the drug-resistant bacteria anywhere in the world and it was "preventable by sound infection-prevention strategies which are followed in any good hospital".

"We strongly refute the naming of this enzyme as New Delhi metallo beta lactamase," the ministry said.

"We also refute that hospitals in India are not safe for treatment, including medical tourism," it added.

The issue was also raised in India's parliament, with angry MPs questioning the Lancet study, saying it was funded by pharmaceutical multi-national companies.

"When India is emerging as a medical tourism destination, this type of news is unfortunate and may be a sinister design of multi-national companies," MP SS Ahluwalia of the opposition Bharatiya Janata Party said.

Congress party's Jayanthi Natarajan said the report of the superbug was a "wrong propaganda against the country".

Indian medical tourism industry is growing rapidly and is estimated to be worth hundreds of millions of dollars.

Try reading "Conversations with the Crow", if you can stomach it, for an insight in how the world operates. http://www.shop.conversationswiththecrow.com/Conversations-with-the-Crow-CWC-GD01.htm
or in installments at http://www.tbrnews.org/
 
My microbiology professor told us several times that it won't be the nuclear bomb that eliminates large portions of people-- it will be resistant microbes. We all talked quite a bit about the up and coming epidemic(s). He told us what we at TB2K already knew-- that the Bird and Swine flus are just epidemics of political convenience. He said that we'll know it when a real epidemic hits because people will be dropping dead in the streets. :eek:

Basically, even dead microbes can lend their dna to living microbes, sometimes greatly increasing the virulence of the living microbe. To learn more about how bacteria can combine genentic information, read this:

Fair use for education and discussion purposes.

http://en.wikipedia.org/wiki/Frederick_Griffith

Griffith's experiment, conducted in 1928 by Frederick Griffith, was one of the first experiments suggesting that bacteria are capable of transferring genetic information through a process known as transformation.[1][2]

Griffith used two strains of Streptococcus pneumoniae (which infects mice), a type III-S (smooth) and type II-R (rough) strain. The III-S strain covers itself with a polysaccharide capsule that protects it from the host's immune system, resulting in the death of the host, while the II-R strain doesn't have that protective capsule and is defeated by the host's immune system. A German bacteriologist, Fred Neufeld, had discovered the three pneumococcal types (Types I, II, and III) and discovered the Quellung reaction to identify them in vitro.[3] Until Griffith's experiment, bacteriologists believed that the types were fixed and unchangeable, from one generation to another.

In this experiment, bacteria from the III-S strain were killed by heat, and their remains were added to II-R strain bacteria. While neither alone harmed the mice, the combination was able to kill its host. Griffith was also able to isolate both live II-R and live III-S strains of pneumococcus from the blood of these dead mice. Griffith concluded that the type II-R had been "transformed" into the lethal III-S strain by a "transforming principle" that was somehow part of the dead III-S strain bacteria.

Today, we know that the "transforming principle" Griffith observed was the DNA of the III-S strain bacteria. While the bacteria had been killed, the DNA had survived the heating process and was taken up by the II-R strain bacteria. The III-S strain DNA contains the genes that form the protective polysaccharide capsule. Equipped with this gene, the former II-R strain bacteria were now protected from the host's immune system and could kill the host. The exact nature of the transforming principle (DNA) was verified in the experiments done by Avery, McLeod and McCarty and by Hershey and Chase.

Image of Griffith's experiment: http://en.wikipedia.org/wiki/File:Griffith_experiment.svg
 
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