下面的短文有5处空白，短文后有6个句子，其中5个取自短文，请根据短文内容将其分别放回原有位置，以恢复文章原貌。 Dung to death Fields across
Europe are contaminated with dangerous levels of the antibiotics (抗生素) given to
farm animals. The drugs, which are in manure sprayed (喷射) onto fields as
fertilizers (肥料), could be getting into our food and water, helping to create a
new generation of antibiotic-resistant "superbugs” The warning
comes from a researcher in Switzerland who looked at levels of the drugs in farm
slurry. (46) Some 20,000 tons of
antibiotics are used in the European Union and the US each year. More than half
are given to farm-animals to prevent disease and promote growth. (47)
Most researchers assumed that humans become infected
with the resistant strains by eating contaminated meat. But far more of the
drugs end :up in manure than in meat products, says Stephen Mueller of the Swiss
Federal Institute for Environmental Science and Technology in Dubendorf.
(48) With millions of tons of animals manure
(施肥于) spread onto fields of crops such as wheat and barley each year, this
pathway seems an equally likely route for spreading resistance, he said. The
drugs contaminate (污染) the crops, which are then eaten. (49)
Mueller is particularly concerned about a group of
antibiotics called sulphonamides. (50) His analysis found
that Swiss farm manure contains a high percentage of sulphonamides; each hectare
of field could be contaminated with up to 1 kilogram of the drugs. This
concentration is high enough to trigger the development of resistance among
bacteria. But vets are not treating the issue seriously. There
is growing concern at the extent to which drugs, including antibiotics, are
polluting the environment. Many drugs given to humans are also excreted
unchanged and are not broken down by conventional sewage (用污水灌溉)
treatment. A. They do not easily degrade or dissolve in
water. B. And manure contains especially high levels of bugs
that are resistant to antibiotics, he says. C. Animal
antibiotics is still an area to which insufficient attention has been
paid. D. But recent research has found a direct link between the
increased use of these farmyard drugs and the appearance of antibiotic-resistant
bugs that infect people. E. His findings are particularly
shocking because Switzerland is one of the few countries to have banned
antibiotics as growth promoters in animals feed. F. They could
also be leaching into tap water pumped from rocks beneath fertilized
fields.