Polysaccharide encapsulated bacteria
Polysaccharide encapsulated bacteria, frequently referred to simply as encapsulated bacteria and less precisely called encapsulated organisms, are a group of bacteria that have an outer covering, a capsule, made of polysaccharide.
Examples of encapsulated bacteria
- Haemophilus influenzae type B (Hib)
- Streptococcus pneumoniae (pneumococcus)
- Neisseria meningitides (meningococcus)
- Group B streptococcus (GBS)
- Salmonella typhi
Role in disease
People that lack a spleen, functionally (as in sickle cell disease) or anatomically (due to a splenectomy or congenital absence), have been shown to be more susceptible to these pathogens. Therefore, it is standard medical practise to recommend vaccination.
Young children do not have the ability to make antibodies to polysaccharide and are, therefore, more susceptible to encapsulated bacteria.
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