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Yu, Huabo; Feng, Chao; Raza, Sayed Haidar Abbas; Zhang, Liang; Chi, Teng; Qi, Yanling; Jia, Kaixiang; Zhang, Yang; Wei, Junfeng; Qian, Aidong; Sun, Wuwen; Shan, Xiaofeng; Zhang, Lei
Archives of virology, 02/2022, Letnik: 167, Številka: 2Journal Article
Aeromonas hydrophila ( A. hydrophila ) is an opportunistic pathogen of fish, humans, and livestock, and has a severe negative impact on aquaculture development. Phage therapy is considered an alternative strategy for controlling bacterial infections and contamination. In this study, we isolated and characterized the genomes of two A. hydrophila -specific phages, PZL-Ah1 and PZL-Ah8, which, based on transmission electron microscopy, were identified as members of the family Podoviridae . Both of these phages had a relatively narrow host range, with lytic activity against Aeromonas spp . strains. Whole-genome sequence analysis revealed that PZL-Ah1 and PZL-Ah8 have a double-stranded DNA genome of 38,641 bp and 40,855 bp in length, with a GC content of 53.68% and 51.89%, respectively. Forty-four open reading frames (ORFs) were predicted in PZL-Ah1, and 52 were predicted in PZL-Ah8. Twenty-eight (63.6%) ORFs in PZL-Ah1 and 29 (55.8%) ORFs in PZL-Ah8 were predicted to encode functional proteins with homologs in the NCBI database, while the remaining ORFs were classified as encoding hypothetical proteins with unknown functions. A comparison with known phage genes suggested that ORF 02, ORF 29, and ORF 04 of PZL-Ah1 and ORF 2 and ORF 4 of PZL-Ah8 are involved in host cell lysis. This study expands the phage genome database and provides good candidates for phage typing applications.
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