Genotyping, morphology and molecular characteristics of a lytic phage of Neisseria strain obtained from infected human dental plaque

Ahmed N Aljarbou, Mohamad Aljofan

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6 Citations (Scopus)


The lytic bacteriaphage (phage) A2 was isolated from human dental plaques along with its bacterial host. The virus was found to have an icosahedron-shaped head (60+/-3 nm), a sheathed and rigid long tail ( approximately 175 nm) and was categorized into the family Siphoviridae of the order Caudovirales, which are dsDNA viral family, characterised by their ability to infect bacteria and are nonenveloped with a noncontractile tail. The isolated phage contained a linear dsDNA genome having 31,703 base pairs of unique sequence, which were sorted into three contigs and 12 single sequences. A latent period of 25 minutes and burst size of 24+/-2 particles was determined for the virus. Bioinformatics approaches were used to identify ORFs in the genome. A phylogenetic analysis confirmed the species inter-relationship and its placement in the family.
Original languageEnglish
Pages (from-to)609 - 618
Number of pages10
JournalThe Journal of Microbiology
Issue number7
Publication statusPublished - 2014

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