Poly-N-acetylglucosamine (PNAG) is a surface polysaccharide produced by Staphylococcus aureus and Staphyloccus epidermidis and is an effective target for opsonic and protective Ab for these two organisms. Recently, it has been found that Escherichia coli produces an exo-polysaccharide, designated polyglucosamine, that is biochemically indistinguishable from PNAG. We analyzed 30 E. coli strains isolated from uri...
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