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Keep Antibiotics Working: The Campaign to End Antibiotics Overuse (external link) is a coalition of health, consumer, agricultural, environmental, humane and other advocacy groups with more than nine million members
dedicated to eliminating a major cause of antibiotic resistance:
the inappropriate use of antibiotics in food animals.
The
Issue:
Throughout America,
infectious diseases are emerging that we may not be able
to cure because bacteria have become resistant to antibiotics.
Over the last 60 years, effective antibiotics
have turned bacterial infections into treatable conditions,
rather than the life-threatening scourges they once were.
The effectiveness of many life-saving antibiotics is, however,
waning
(external link). Health experts have deemed the rise in
antibiotic resistance a public health crisis. Everyone is
at risk from antibiotic-resistant infections, but children,
seniors, and people with weakened immune systems are particularly
vulnerable (external link).
The overuse of antibiotics is to blame
for the rapid rise in antibiotic-resistant bacteria. In
addition to human medicine, a major source of this overuse
is the use of antibiotics as feed additives for livestock
and poultry. This overuse mostly occurs on large confined
animal feeding operations (CAFOs), which often raise pigs,
poultry or cattle by the thousands or tens of thousands
under crowded conditions. Much of the use of antibiotics
in animal feed is not to treat sick animals, but to promote
growth and to compensate for crowded, stressful and unsanitary
conditions.
Unfortunately, such low-dose uses of antibiotics
for extended periods of time are one of the best ways to
speed the development of antibiotic-resistant bacteria.
Although no definitive data are available, by one estimate
antibiotic feed additives for livestock and poultry is about
24 million pounds, or 70%
of the total amount of antibiotics used in the United
States. Roughly half of these antibiotic feed additives
belong to classes of drugs also used to treat human disease.
Although even careful use of antibiotics
can result in the emergence of antibiotic-resistant bacteria,
inappropriate use greatly accelerates this process. The
more often bacteria are exposed to antibiotics, the more
they become resistant. Because bacteria reproduce rapidly,
these antibiotic-resistant bacteria can spread efficiently.
In addition, unlike higher organisms, bacteria can transfer
DNA to other bacteria that are not their offspring, and
even to members of completely unrelated bacterial species.
In effect, bacteria can teach one another how to ‘outwit’
antibiotics.
| Antibiotic-Resistant
Bacteria can be Transferred From Animals to Hhumans
in Three Ways |
Via food: During slaughter
and processing, the bacteria in an animal’s intestinal
tract, including in fecal matter, can spread to the meat
that ends up in the grocery store. In fact, the meat in
the grocery stores is widely contaminated with antibiotic-resistant
bacteria. A study published in the January 2003 issue of
Consumer Reports showed that 42 percent of the chickens
bought at supermarkets and other stores were contaminated
with Campylobacter bacteria and 90 percent of the this bacteria
tested showed resistance to at least one antibiotic.
Via working with livestock:
Workers in the livestock industry may pick up resistant
bacteria by handling animals, feed, and manure. They can
then transfer the bacteria to their family and community
members.
Via the environment:
Groundwater, surface water, soil and the air are contaminated
from the nearly two trillion pounds of manure generated
in the United States each year. This manure contains resistant
bacteria, creating an immense pool of resistance genes available
for transfer to bacteria that can cause human disease.
There
are a few new antibiotics on the horizon, and bacteria are
becoming resistant far faster than new antibiotics are becoming
available. Unfortunately, antibiotic development is often
on the pharmaceutical back burner. Reasons include the likelihood
that bacteria will become resistant to any new antibiotic
manufactured and the high R&D costs of developing a
new antibiotic. (By one estimate, the cost of developing
a new drug tops $800 million.). Additionally, new antibiotics
tend to be considerably more expensive than existing ones,
and thus contribute to ever rising healthcare costs.
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