Drug-Resistant HIV Spreads; Implications Still Mysterious
posted: May 2, 2007 9:09 EST
By Nina Shapiro, Seattle Weekly
The number of men turning up in King County with drug-resistant HIV is growing. In February, public-health officials announced that a monitoring program had found four men whose strain of the human immunodeficiency virus showed resistance to at least 15 of the 29 available AIDS drugs. In the two months since, two more men have tested positive for the same strain. "It's not going away," says Susan Buskin, the health department's epidemiologist in charge of analyzing tests for drug resistance.
It sounds scary, and indeed the health department's announcement back in February aroused new fears of an HIV "superbug," as reporters referred to it when they called into King County from all over the country. But in fact, it's far from clear how much alarm is warranted.
King County is trying to puzzle out the significance of this strain in the wake of a famous New York City case. Two years ago, the health department there announced that it had found a man with a drug-resistant strain of HIV who had progressed rapidly to full-blown AIDS. The notion of a "superbug" took hold.
But new research published in the May 1 edition of The Journal of Infectious Diseases debunks that idea. Two papers detail how New York's health department tracked down the person who infected the New York man with the supposed superbug. It turned out that neither that person nor his partner (who had the same strain of HIV) had progressed rapidly to AIDS. This led researchers to conclude that it was something about the New York man — a weakened immune system due to his drug use, perhaps — that brought on AIDS more quickly, rather than the virus itself.
The examination revealed another, less encouraging finding. The source's partner had been "superinfected" with the drug-resistant strain of HIV; that is, he'd already had HIV and then got infected with the drug-resistant variety — a "cautionary tale," as one of the journal papers put it.
