Holy crap.

HONG KONG -- Chinese farmers, acting with the approval and encouragement of government officials, have tried to suppress major bird flu outbreaks among chickens with an antiviral drug meant for humans, animal health experts said. International researchers now conclude that this is why the drug will no longer protect people in case of a worldwide bird flu epidemic.

China's use of the drug amantadine, which violated international livestock guidelines, was widespread years before China acknowledged any infection of its poultry, according to pharmaceutical company executives and veterinarians.

[...] Amantadine is one of two types of medication for treating human influenza. But researchers determined last year that the H5N1 bird flu strain circulating in Vietnam and Thailand, the two countries hardest hit by the virus, had become resistant, leaving only an alternative drug that is difficult to produce in large amounts and much less affordable, especially for developing countries in Southeast Asia.

"It's definitely an issue if there's a pandemic. Amantadine is off the table," said Richard Webby, an influenza expert at St. Jude Children's Research Hospital in Memphis.

Lots of drugs can eventually become ineffective if the organisms they fight can adapt. How stupid (or greedy) do you have to be to ruin the drug's effectiveness without even letting it work on humans?

Health experts outside China previously said they suspected the virus's resistance to the medicine was linked to drug use at poultry farms but were unable to confirm the practice inside the country. Influenza researchers at the U.S. Centers for Disease Control and Prevention, in particular, have collected information about amantadine use from Chinese Web sites but have been frustrated in their efforts to learn more on the ground.

[…] In interviews, executives at Chinese pharmaceutical companies confirmed that the drug had been used since the late 1990s, to treat chickens sickened by bird flu and to prevent healthy ones from catching it.

"Amantadine is widely used in the entire country," said Zhang Libin, head of the veterinary medicine division of Northeast General Pharmaceutical Factory in Shenyang. He added, "Many pharmaceutical factories around China produce amantadine, and farmers can buy it easily in veterinary medicine stores."

Zhang and other animal health experts said the drug was used by small, private farms and larger commercial ones. Amantadine sells for about $10 a pound, a fraction of the drug's cost in Europe and the United States, where its price would be prohibitive for all but human consumption.

Two months before China first reported a bird flu outbreak in poultry to the World Animal Health Organization in February 2004, officials had begun a massive campaign to immunize poultry against the virus. They have now used at least 2.6 billion doses of a vaccine.

It's the NRA strategy writ large - give everyone the same weapons and we'll all be safer. Not.