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We examined the compatibility of the Salmonella virulence plasmids of serovars choleraesuis, dublin, enteritidis, gallinarum and pullorum and the cryptic Salmonella plasmids of serovars copenhagen,(More)
Shigella sonnei, an intestinal pathogen, produces a characteristic form I cell surface antigen now known to be plasmid encoded. We considered that the GalE Salmonella typhi Ty21a oral vaccine strain,(More)
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