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SMM
Jun 10, 2008, 03:52 PM
This is a story, which was in the Seattle PI yesterday. I am not sure if it has been widely reported. Since there have been over 94,000 infections, resulting in nearly 19,000 deaths, it is something to be taken seriously. Since the USDA is not even testing for it, makes it doubly troubling.



From The Seattle PI: (http://seattlepi.nwsource.com/local/366301_pigmrsa09.html?source=mypi)

Federal food safety and public health agencies are being urged to begin checking meat sold across the country for the presence of MRSA, a potentially fatal bacteria. Scientists have found the infection in U.S. pigs and farmworkers.

Members of Congress and public health advocates are demanding that the government determine whether highly infectious MRSA has entered the food supply.

MRSA -- methicillin-resistant Staphylococcus aureus -- can be extremely dangerous, according to the federal Centers for Disease Control and Prevention. Dr. Monina Klevens examined the cases of the disease reported in hospitals, schools and prisons in one year and extrapolated that "94,360 invasive MRSA infections occurred in the United States in 2005; these infections were associated with death in 18,650 cases."

The infection has been reported among livestock and farmworkers in Europe, Scandinavia and Canada, but the U.S. government has yet to test animals in this country.

Last week, the Seattle P-I's "Secret Ingredients" blog disclosed that Tara Smith, an assistant professor at the University of Iowa Department of Epidemiology, and her graduate researchers found MRSA in more than 70 percent of the pigs they tested on farms in Iowa and Illinois.

In what is apparently the first testing of swine for MRSA in the U.S., Smith and her team swabbed the noses of 209 pigs on 10 farms. They also found the bacteria among livestock workers employed by those hog operations.

On Friday, at the annual meeting of the American Society for Microbiology in Boston, Abby Harper, one of Smith's graduate assistants, presented the results of the study on farmworkers. She said she and Michael Male tested 20 workers at the Iowa swine farms and found that 45 percent carried the same MRSA bacteria as the pigs.



bamaworks
Jun 10, 2008, 04:01 PM
No doubt MRSA is a nasty bug in given the correct immune conditions and growth substrate. The key word here is systemic infections. Human gut is designed to house a significant bacterial load. In fact, maximum possible capacity per mL is housed. Talk about difficult to treat with the highly favorable environment. Couple that with the fact that the must be treated often with broad spectrum antibiotics that are nearly all resisted, and furthermore, with the side effect of complete normal flora toxigenicity that the antibiotics cause (removal of normal flora decreases human resistance to pathogens), one can see why when this bug is systemic it does so much damage.

This puts physicians in a bind also, considering most MRSA is vancomycin susceptible to a degree (and typically ONLY vanco) that administering it on a casual basis for these infections will lead to vancomycin resistant strains as well. Good news is that new Antibiotics are consistently in development...

But what they won't tell you is the large percentage of humans who have MRSA as a part of their normal flora in the nares (nostrils). I'm one of them ;), as are a number of people in the laboratory!

Jaffa Cake
Jun 10, 2008, 04:03 PM
I wouldn't worry about it, our hospitals here are supposed to be full of the stuff anyway.

themadchemist
Jun 11, 2008, 03:47 PM
I wouldn't worry about it, our hospitals here are supposed to be full of the stuff anyway.

Just cuz you're loaded with it, doesn't mean it's not a basis for worry. That said, like bamaworks said, I'd be more concerned in the immunodeficient (like folks in hospitals).