目的了解医院内感染耐药性菌质粒的分布情况。
Objective To study the distribution of plasmids in drug resistance bacteria of nosocomial infections.
这引起严重关注，因为具有耐药性的感染可造成死亡，可传播给他人，而且会对个人和社会造成巨额费用。
This is a major concern because a resistant infection may kill, can spread to others, and imposes huge costs to individuals and society.
当这些寄生虫繁殖并感染新的个体的时候，耐药性就扩散了。
When these multiply and go on to infect new individuals, drug resistance spreads.
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