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The majority of identified bacteriophages within the oral cavity pertain to the Caudovirales order, which contains three different families of tailed bacteriophages, all with an icosahedral capsid along with a linear dsDNA genome that is injected into bacterial hosts after penetration of cell membrane with tail. A, Myoviridae have a long contractile tail; B, Siphoviriadae have a long, noncontractile tail; and C, Podoviridae have a short tail
