• bacteria
  • The polysaccharide antigens were used to induce type-specific antibodies that enhanced opsonization, phagocytosis, and killing of Streptococcus pneumoniae (pneumococcal) bacteria by phagocytic immune cells. (wikipedia.org)
  • Young children do not have the ability to make antibodies to polysaccharides and are, therefore, more susceptible to encapsulated bacteria, the capsules of which contain polysaccharides. (wikipedia.org)