Characterization and genome sequence of the genetically unique Escherichia bacteriophage vB_EcoM_IME392

Complete Genomic Analysis of the Novel Phage BUCT-3589, Infecting Klebsiella pneumoniae

We report the complete genome sequence of the phage BUCT-3589, infecting multidrug-resistant Klebsiella pneumoniae 3589. It is a new member of the genus Przondovirus in the family Autographiviridae and possesses a double-stranded DNA (dsDNA) genome of 40,757 bp with 53.13% GC content. The genome sequence will support its use as a therapeutic agent.

Potential application of a newly isolated phage BUCT609 infecting Stenotrophomonas maltophilia

Stenotrophomonas maltophilia (S. maltophilia) is widely distributed in nature and frequently causes nosocomial infections. In this work, the biological characteristics and genome of a new S. maltophilia phage BUCT609 isolated from hospital sewage with S. maltophilia strain No. 3015 as host was analyzed and its therapeutic effect in vivo was explored. It was observed by TEM that phage BUCT609 belongs to the Podoviridae with a 10 nm tail structure and a capsid with a diameter of about 50 nm. It has a short latent period (about 10 min) and its burst size is 382 PFU /cell when multiplicity of infection (MOI) is 0.01. Furthermore, it has a high survival rate in the environment with a pH range from 3 to 10 and temperature range from 4°C to 55°C. The complete genome of phage BUCT609 is linear double-stranded DNA of 43,145 bp in length, and the GC content is 58%. The genome sequence of phage BUCT609 shares <45% homology with other phages. No virulence genes and antibiotic resistance genes were found in bacteriophage BUCT609. In vivo animal experiments showed that the survival rate of mice infected with S. maltophilia was significantly improved after the intranasal injection of phage BUCT609. Therefore, our study supports that phage BUCT609 could be used as a promising antimicrobial candidate for treating S. maltophilia infections.

Genomic Analysis of the Serratia marcescens Bacteriophage BUCT660

Here, we report the complete genome sequence of bacteriophage BUCT660, which comprises a linear double-stranded DNA (dsDNA) genome of 272,720 bp and a G+C content of 47%. BUCT660 contains 316 open reading frames and 2 tRNA-encoding genes. The results of transmission electron microscopy (TEM) indicate that BUCT660 is a member of the family Caudooviricetes.

Biological characterization and genomic analysis of Acinetobacter baumannii phage BUCT628

Acinetobacter baumannii is an opportunistic pathogen that is resistant to the most commonly used antibiotics. In this study, the Acinetobacter phage BUCT628 was isolated from hospital wastewater. BLASTn analysis showed that the genome sequence of BUCT628 shared 89.76% identity with 66% query coverage with that of Acinetobacter phage Bphi-R2919. Genome sequencing showed that the BUCT628 genome is a 44,935-bp linear dsDNA molecule with 37.5% G+C content and 86 open reading frames (ORFs), and no tRNAs were identified.

Genomic Analysis of Bacteriophage BUCT86 Infecting Klebsiella Pneumoniae

Phage BUCT86 possesses a genome of 44,542 bp of double-stranded DNA, with a G+C content of 54%. The result of BLASTn analysis showed that the genome sequence of phage BUCT86 shared similarity with that of Klebsiella phage CX1, with 82% query coverage and 93.31% identity.

Genomic analysis of Acinetobacter phage BUCT629, a newly isolated member of the genus Obolenskvirus

A new virulent Acinetobacter phage, BUCT629 (GenBank no. MZ712044.1), was isolated from hospital sewage. Next-generation sequencing (NGS) results demonstrated that the double-stranded linear DNA genome of phage BUCT629 is 46,325 bp in length with a G+C content of 38%. The BLASTn analysis showed that the genome sequence shared similarity with Acinetobacter phage vB_AbaM_IME285, with 65% query coverage and 98.23% identity, suggesting that phage BUCT629 is a novel phage. The phage genome contains 89 putative protein-coding genes, and no rRNA or tRNA genes were identified. The results of this study may be helpful for discovering new antibacterial agents and for understanding the evolution and genetic diversity of Acinetobacter phages.