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Salmonella paratyphi A, the second most common cause of enteric fever in Southeast Asia, is a habitant of and a pathogen for humans only. Lipopolysaccharides (LPS) are both essential virulence(More)
Escherichia coli O157 causes severe enteritis and the extraintestinal complication hemolytic-uremic syndrome. Serum IgG against the surface polysaccharide antigen, the O-specific polysaccharide of(More)
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