Recently researchers reopened the field of phage therapy due to the emergence of antibiotics-resistant bacterial strains and the difficulties in discovering new antibiotics.
近年来由于各种耐药菌株的出现，新抗生素的研制困难重重，研究噬菌体用于治疗细菌性疾病又重新受到重视。
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For example, transfer of virulence gene and transmission of drug-resistant gene mediated by a phage results in gene polymorphism of bacteria, which is an important problem in medicine and genetics.