A toy might be harmlessly flushed out, but it might also perforate tissue, leading to bleeding or infection.

玩具可以无害地取出，当然也可以戳穿机体组织，导致出血或感染。

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Placed on serious wounds, maggots mimic their "wild" lifestyle and munch on bacteria and dead tissue, stimulating healing and helping to prevent infection.

只要把蛆放在严重的伤口上，它们便会大块朵颐细菌和坏死的组织。它们可以加快伤口愈合并防止感染。

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Once infection occurs, however, they are of little value to already infected plant tissue.

一旦感染发生，但是，它们没有什么价值的已被感染的植物组织。

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Severe frostbite however requires immediate medical attention, because it can cause permanent damage to skin underlying tissue, bones and muscle, and can lead to complications including infection, and nerve damage.

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Soft tissue damage is particularly prone to infection.

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In separate procedures on Friday, Saturday and Sunday, surgeons cut out dead skin and tissue from both legs to keep the infection from spreading and put her on antibiotics, said Kuykendall.

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