HIV :: Washington county records four cases of drug-resistant HIV

Four men in King County, Washington, have been diagnosed with a strain of HIV that is resistant to at least two types of antiretroviral drugs, and health officials on Thursday said they are concerned the strain could spread, the Seattle Times reports.

A third antiretroviral has limited effectiveness against the strain. Officials said that the same genetic strain of HIV was recorded within 15 months among the men, who were diagnosed with the drug-resistant strain as soon as they tested HIV positive. The men used methamphetamine and had multiple anonymous sexual partners, including men. None of the men was known to have had sex with any of the other three.

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