Researchers say a superbug may have broken through medicines thought to be the last line of defense against it.

FOX's Tonya J. Powers has the story:

New Jersey researchers say they have identified a strain of E-coli in the U.S. that seems to have outwitted two different kinds of antibiotics that have been considered as the last line of defense against superbugs.

The bacteria was found in a 76-year-old man who was treated in 2014 for a complicated urinary tract infection. The news comes from the american society for microbiology.

The man recovered, but upon looking further into the case this year, the bacteria was found.

He was treated successfully with other antibiotics, but researchers say the bacterium had the potential to spread and become a powerful superbug.

Tonya J. Powers, FOX News.

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