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Health concerns prompt US review of exotic-pet trade

Washington

For years, biologists have railed against the US$6-billion international wildlife trade, claiming that it has driven a long list of species to the brink of extinction. Now the US government seems to be paying attention to such protests — but not because of any newfound concern for animal welfare.

Instead, US officials are worried about diseases such as severe acute respiratory syndrome (SARS) and monkeypox, which caused epidemics last year when they jumped from animals to people. Conservation groups have been arguing that the animal trade is to blame for such epidemics — and they seem to be gaining the ear of the government.

The latest call came on 14 January, when the New York-based group Wildlife Trust convened biologists and ecologists from ten countries in Bangalore, India. The scientists issued a declaration calling for “an urgent reassessment of current wildlife trade practices”.

Last summer, a coalition of US epidemiologists and veterinarians said that the federal government should expand an order that restricted the importation of rats and prairie dogs into the United States. The animals were responsible for an outbreak of monkeypox that infected 40 people in the midwest last summer.

“To protect public health, this order should be permanently sustained and expanded to restrict the movement of exotic wildlife with potential adverse impact on public health,” the Council of State and Territorial Epidemiologists and the National Association of State Public Health Veterinarians wrote in a letter to government agencies including the Centers for Disease Control and Prevention (CDC) in Atlanta, Georgia.

Now there are signs that such arguments are hitting home. On 13 January, the US health department declared the country off-limits to civets in a precaution against an outbreak of SARS, the flu-like illness first reported in China last February. Nobody has yet proved that the animals were the source of the SARS epidemic, but scientists have found that civets on sale in Chinese markets harbour viruses that are very similar to those that cause SARS. US health officials say that since the civet market is not large in the United States — only 50 are imported every year — this limited evidence convinced them to enact a ban. And they say that they are looking for a more widespread approach to the problem of animal-borne, or zoonotic, diseases.

“There's been a lot of increased discussion from federal agencies and independent groups to see what can be done to reduce the risk of importing zoonotic disease into this country,” says Paul Arguin, a specialist in animal-borne diseases at the CDC. Arguin says that the CDC has been talking with the public-health veterinarians' group on ways to address this threat. “It's fair to say that the CDC is in support of increased regulation of the exotic-pet trade,” he says.

Mary Pearl, president of the Wildlife Trust, says that such regulation is overdue. For a start, she says, governments should use better quarantine and surveillance methods for animals coming into the country, and could give more funding to enforcement agencies that are supposed to police the illegal wildlife trade.

“They've been rapidly closing the barn door after the horse has bolted,” Pearl says. “It would make more sense to have a rational set of policies that requires adequate surveillance of the wildlife trade, because there simply are not enough safeguards to protect public health.”

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Check, E. Health concerns prompt US review of exotic-pet trade. Nature 427, 277 (2004). https://doi.org/10.1038/427277a

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