| 31. | Drug-resistant strains then flourish as antibiotics kill off other bacteria that compete for food.
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| 32. | Under such circumstances, resistant strains could be transmitted to others.
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| 33. | In aquaculture, there are efforts to locate and breed more resistant strains of oysters.
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| 34. | Drug-resistant strains of the disease arise when infected people are poorly or incompletely treated.
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| 35. | And the resistant strain will spread, and spread fast, and spread all over the place.
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| 36. | The drug resistant strains can be created many times.
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| 37. | And drug resistant strains have been on the rise.
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| 38. | Twenty percent of the chickens had a resistant strain.
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| 39. | Resistant strains of the HIV virus emerge rapidly if only one antiviral drug is used.
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| 40. | In 1980, less than one percent involved antibiotic-resistant strains.
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