News and Research
Immune System
Avian Flu: Shut Down Wild Bird Markets, Experts Say
2-3-2004
A group of scientists and wildlife health experts from the
New York-based Wildlife Conservation Society (WCS) say that
closing Asia's wild bird markets would reduce the spread
of Avian flu. The markets place tens of thousands of wild
and domestic birds in close quarters, allowing diseases
to make the jump between wild animals, livestock, and ultimately
humans, WCS says. The group also expressed concern that
policies calling for widespread killing of birds living
in the wild to prevent disease would do more harm than good.
According
to WCS, which operates conservation programs in more than
15 Asian countries, wild birds are caught, usually by rural
hunters, then brought together in large numbers often outside
their natural range, and put in contact with other animals
and people that have little immunity to diseases they might
be carrying.
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"The
birds are caged in stressful, unnatural and often unhygienic conditions
during transport and in the markets themselves where they are
forced to stand beak to beak with both wild and domestic birds,
and handled by humans - all providing the ideal conditions for
transmission of disease," said Dr William Karesh, Director
of the WCS Field Veterinary Program.
The
trade in wild birds for the pet and songbird trade in Asia is
vast. For example, in Bangkok's weekend market during 25 weekends
in one year alone, 70,000 birds representing 276 species from
Asia Australia, Africa and South America were sold. In a single
market in Java, Indonesia, between half a million and 1.5 million
wild birds are sold each year
"The
wild bird trade in Asia is conducted on an extremely large scale,
and is highly fluid," said Dr. Elizabeth Bennett, WCS's director
of hunting and wildlife trade. "The one common theme is that
wild birds are being caught, sold and transported in very large
numbers, and that effective controls, both in terms of laws and
enforcement of those laws, are currently weak across much of Asia".
WCS
says that one of the easiest and most obvious ways to reduce the
threat of avian flu spreading both globally and regionally through
the wild bird trade is to close down the wild bird markets within
Asia, and for airlines to stop carrying large numbers of animals
over large distances for commercial markets. The EU has already
banned the import of pet birds from Asian countries where avian
flu has been detected.
WCS
also says that one proposed solution of killing the free-ranging
wildlife will not solve the problem, and can have many unforeseen
repercussions. For example, large-scale killing of sparrows and
crows during the Great Leap Forward in China in the late 1950's
resulted in failed rice crops and massive famine because the birds
had actually been controlling pests.
Dr
Robert Cook, Vice President of Wildlife Health at WCS , said,
"In almost all cases, eradication schemes are not cost-efficient
or effective means to reduce disease spread when compared to health
education, sanitation, and controlling animal movement."
This story has been adapted from a news release issued
by Wildlife Conservation Society, http://wcs.org.
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