If conditions within an organism's environment occasionally or regularly become harsh, it may be advantageous for an organism to have a resistant stage built into the life cycle.

如果一个有机体的环境条件偶尔或经常变得严酷，它可能是有利于这个有机体在生命周期中形成一个抗性阶段的内建。

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However, an effective strategy, the management of drug-resistant TB is still in pilot stage.

然而，作为一项有效的策略，对耐药结核病的管理仍处于试验阶段。

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Tests showed that the XF-73 "bacteriocidal" compound continued to destroy MRSA after repeated treatment, long past the stage when it would have become resistant to antibiotics.

试验证明XF - 73这种化合物在重复治疗下对MRSA有持续杀灭作用，而在过去，使用抗生素则MRSA很快就产生抗药性。

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Cyberonics' poker-chip-size device, surgically implanted in the chest, is approved for treating drug-resistant epilepsy and has moved into final-stage human tests for the far bigger market of drug-resistant depression.

FORBES: Rewiring the brain

Similar resistant strains have been detected in Europe but at this stage only on an ad hoc basis, says Dr Hurt.

BBC: Drug-resistant pandemic swine flu 'community risk'

On October 13th a study published in Science Translational Medicine revealed that early-stage trials show a new tuberculosis vaccine may work against drug-resistant strains of that killer disease.

ECONOMIST: Big drugs companies see a bright future for vaccines