KNAU and Arizona News
3:55 pm
Tue February 21, 2012

MRSA Evolves As It Moves Between Humans and Livestock

This 2005 scanning electron micrograph (SEM) depicted numerous clumps of methicillin-resistant Staphylococcus aureus bacteria, commonly referred to by the acronym, MRSA; Magnified 9560x.
Janice Haney Carr Centers for Disease Control and Prevention

Researchers connected with Northern Arizona University have discovered the origins of a strain of anti-biotic resistant staph.

Their new study appeared this week in the on-line journal mbio, published by the American Society of Microbiology..

The bacterium started in humans, moved to animals, then moved back to humans again.

And in the course of its journey, it developed its resistance to antibiotics.

First some basic terms.

Staphylococcus aureus, or staph, is a common bacterium.

Read more