Antimicrobial agents should be used rationally to decrease multiple antibiotic resistant strains.

要减少多重耐药菌株的产生，应注意合理使用抗菌药物。

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Over 30 countries have already banned the use of antibiotic growth promoters, mainly due to concerns about human health and the emergence of bacteria resistant to multiple types of antibiotics.

超过30个国家已经禁止使用抗生素促生长剂，主要原因为人类健康及抗生素耐药性问题。

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But today it has announced FDA approval for Tygacil, a new antibiotic that may be very useful at treating infections where there are multiple types of resistant bacteria, or where the pathogen can't be identified.

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