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A family of relatively large bacterial viruses with complex contractile tails, heads that are usually elongated but are isometric in some species, and a double-stranded DNA genome (MW 21-190 × 106). It includes the T-even phage group and probably other genera.
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Dimensions and titration of the isolated phages Phage Prospected Head Tail Phage titer (PFU/ml) Family diameter length (mil) (mil) oEU-3 phage Siphoviridae 71.42 214.28 2 x [10.sup.7] oEU-4 phage Myoviridae 66.6 108.3 2 x [10.sup.5]
On the other hand, the Myoviridae phages (P-1, P-2, and P-5) had a slightly longer latent period of 20-30 min.
[50] observed that Myoviridae phages drastically lost phage activity (3.5 logs PFU [mL.sup.-1]) after 60 min of incubation at 60[degrees]C.
The average burst size of tested phages was about 329 phages per infected cell, which is more than the typical range of 50-100 PFU [cell.sup.-1] for many Myoviridae and Siphoviridae phages [77, 78].
Phage characterization shows that it belongs to family Myoviridae which not only efficiently lyses VRE but also has outstanding thermal and pH stability that makes it a potential candidate for antibacterial therapy.
Andleeb, "Isolation and characterization of a Myoviridae MJ1 bacteriophage against multi-drug resistant Escherichia coli 3," Jundishapur Journal of Microbiology, vol.
unclassified Sample Viruses Root reads BH 80/11 RNA (3 55 (Myoviridae, Siphoviridae, 377 1,318 pooled samples) Podoviridae, Bunyaviridae, Retroviridae, Papillomaviridae) BH 81/11 RNA 57 (Myoviridae, Siphoviridae, 19 1,006 Podoviridae, Retroviridae) BH 80/11 DNA (3 3 (Herpesviridae, Mimiviridae, 9,181 9,339 pooled samples) unclassified virus) BH 81/11 DNA 1 (Retroviridae) 3 9,929
Consequently, the phages were classified as belonging to family Myoviridae (group A).