Department of Burn and Plastic Surgery, The Affiliated Hospital of Zunyi Medical University, Zunyi, 563000, China.
Department of Laboratory Medicine, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, China.
Sci Rep. 2023 Jan 5;13(1):188. doi: 10.1038/s41598-022-26696-9.
Acinetobacter baumannii has become one of the most challenging conditional pathogens in health facilities. It causes various infectious diseases in humans, such as wound or urinary tract infections and pneumonia. Phage therapy has been used as an alternative strategy for antibiotic-resistant A. baumannii infections and has been approved by several governments. Previously, we have reported two potential phage therapy candidates, Abp1 and Abp9, both of which are narrow-host-range phages. In the present study, we screened and isolated 22 A. baumannii bacteriophages from hospital sewage water and determined that Abp95 has a wide host range (29%; 58/200). The biological and genomic characteristics and anti-infection potential of Abp95 were also investigated. Abp95 belongs to the Myoviridae family, with a G+C content of 37.85% and a genome size of 43,176 bp. Its genome encodes 77 putative genes, none of which are virulence, lysogeny, or antibiotic resistance genes. Abp95 was found to accelerate wound healing in a diabetic mouse wound infection model by clearing local infections of multidrug-resistant A. baumannii. In conclusion, the lytic phage Abp95, which has a wide host range, demonstrates potential as a candidate for phage therapy against multiple sequence types of carbapenem-resistant A. baumannii.
鲍曼不动杆菌已成为医疗机构中最具挑战性的条件致病菌之一。它可导致人类发生各种感染性疾病,如伤口或尿路感染和肺炎。噬菌体疗法已被用作治疗抗生素耐药鲍曼不动杆菌感染的替代策略,并已获得多个政府的批准。此前,我们已经报道了两种潜在的噬菌体治疗候选物 Abp1 和 Abp9,它们都是窄宿主范围的噬菌体。在本研究中,我们从医院污水中筛选并分离了 22 株鲍曼不动杆菌噬菌体,发现 Abp95 具有广泛的宿主范围(29%;58/200)。我们还研究了 Abp95 的生物学和基因组特征及其抗感染潜力。Abp95 属于肌尾噬菌体科,GC 含量为 37.85%,基因组大小为 43176 bp。其基因组编码 77 个推定基因,没有一个是毒力、溶原或抗生素耐药基因。Abp95 被发现可通过清除耐多药鲍曼不动杆菌的局部感染,加速糖尿病小鼠伤口感染模型中的伤口愈合。总之,具有广泛宿主范围的裂解噬菌体 Abp95 有望成为治疗多重耐药碳青霉烯类鲍曼不动杆菌的噬菌体治疗候选物。