
The rate of drug-resistant HIV transmission in the U.S. appears to be holding steady, according to the most recent CDC figures.
About 16% of the HIV genetic sequences analyzed from newly diagnosed patients from 2007 through 2010 showed transmitted drug resistance mutations, according to David Kim, MD, of the CDC.
But the rates have not increased significantly from 2007 -- when the CDC found a rate of 15% -- to 2010, when the rate reached 16.7%, Kim reported here at the Conference on Retroviruses and Opportunistic Infections.
On the other hand, he told reporters after his oral presentation, transmitted resistance to one class of drugs – the non-nucleoside reverse transcriptase inhibitors (NNRTIs) – is rising, with an estimated annual percentage change of 5.2%, which was significant at P=0.03.