Respuesta :
The correct response is a. capsular polysaccharides. The capsular polysaccharides of the different Streptococcus pneumoniae serotypes vary.
Bacterial capsular polysaccharides (CPSs) are important virulence factors that offer protection to those who carry them from a variety of environmental stresses, most notably from the immune system when infecting their animal hosts. The primary virulence factor of bacteria is the capsular polysaccharide (CPS), which makes up the exterior layer of the bacterial cell (Martens et al., 2004). This pathogen has numerous distinct immunological kinds that can be distinguished by its CPS. Streptococcus pneumoniae's polysaccharide capsule, which dominates the organism's surface, is crucial to virulence because it interferes with the host's opsonophagocytic clearance systems. Many bacteria have polysaccharide capsules, which are prokaryotic structures often made of repeated oligosaccharides. These capsules, which are normally made up of just one polysaccharide, are found outside both the peptidoglycan layer and the outer membrane of gram-positive and gram-negative cells, respectively.
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The serotypes of Streptococcus pneumoniae differ in their _____.
a. superantigen products
b. ability to fix complement
c. rates of gene conversion
d. capsular polysaccharides
e. variable surface glycoproteins
f. neuraminidase epitopes.
