Virulent strains of shigella typically carry a large plasmid.

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Virulent strains of shigella typically carry a large plasmid, which contains genes that encode for virulence factors, antibiotic resistance, and other adaptive traits. This plasmid is important for the pathogenesis of shigella and for its ability to cause severe diarrhea and other symptoms in infected individuals. Thus, the presence of this large plasmid is closely associated with the virulence of shigella strains.

Virulent Strains of Shigella Typically Carry a Large Plasmid