Review Salmonella Infections in Childhood. There are over known serovars which current classification considers to be separate species. Second, antibodies directed against the R core common enterobacterial antigen may protect against infection by a wide variety of Gram-negative bacteria sharing a common core structure or may moderate their lethal effects. Baron's Medical Microbiology edisi ke-4th ed. First, the nature of the repeating sugar units in the outer O-polysaccharide chains is responsible for O antigen specificity; it may also help determine the virulence of the organism.
nest...