Genome Analysis and Therapeutic Evaluation of a Novel Lytic Bacteriophage of Salmonella Typhimurium: Suggestive of a New Genus in the Subfamily Vequintavirinae

Viruses

Marc Bailie¹  Sofia Khanum¹  Eric Altermann¹  Ibrar Ahmed²  Tahir Abbas Shah³  Kaleem Imdad⁴  Sundus Javed⁴  Aamira Tariq⁴  Ijaz Ali⁵  Inam Ullah⁵  Fakiha Sohail⁵  Nazish Bostan⁵  Amna Pervaiz⁵  Bushra Shamsi⁵  Sadia Sattar⁵  Aamir Ghafoor⁶ 

[1] AgResearch, Palmerston North 4410, New Zealand;Alpha Genomics Private Limited, Islamabad 45710, Pakistan;Functional Genomics Lab, Department of Biosciences, Comsats University Islamabad, Islamabad 45550, Pakistan;Microbiology and Immunology Lab, Department of Biosciences, Comsats University Islamabad, Islamabad 45550, Pakistan;Molecular Virology Labs, Department of Biosciences, Comsats University Islamabad, Islamabad 45550, Pakistan;University Diagnostic Lab, The University of Veterinary and Animal Sciences (UVAS), Lahore 54000, Pakistan;

关键词: lytic phages;    Vequintavirinae;    genome analysis;    Salmonella Typhimurium;    Salmonella-specific bacteriophage;   

DOI  :  10.3390/v14020241

来源: DOAJ

【 摘 要 】

Salmonella Typhimurium, a foodborne pathogen, is a major concern for food safety. Its MDR serovars of animal origin pose a serious threat to the human population. Phage therapy can be an alternative for the treatment of such MDR Salmonella serovars. In this study, we report on detailed genome analyses of a novel Salmonella phage (Salmonella-Phage-SSBI34) and evaluate its therapeutic potential. The phage was evaluated for latent time, burst size, host range, and bacterial growth reduction in liquid cultures. The phage stability was examined at various pH levels and temperatures. The genome analysis (141.095 Kb) indicated that its nucleotide sequence is novel, as it exhibited only 1–7% DNA coverage. The phage genome features 44% GC content, and 234 putative open reading frames were predicted. The genome was predicted to encode for 28 structural proteins and 40 enzymes related to nucleotide metabolism, DNA modification, and protein synthesis. Further, the genome features 11 tRNA genes for 10 different amino acids, indicating alternate codon usage, and hosts a unique hydrolase for bacterial lysis. This study provides new insights into the subfamily Vequintavirinae, of which SSBI34 may represent a new genus.

【 授权许可】

Unknown