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There is one major difference between these two types

There is one major difference between these two types; the III-S strain has a smooth polysaccharide coat which makes it resistant to the immune system of mice, whereas the II-R strain lacks this coat and so will be destroyed by the immune system of the host. j jn j njn jn jn jn jhscgdy hdu jusdh nsdu hjh hdh bd hhgdh hdgjhsbh sj duhsdhjbe jhsd y y g h hghh hg hshs js jd gsdj bjd jh dh dhh h jsdhh d hd sk dhy ha yy u h h h h h h hh h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h h hh hnjg jb gnb jg bhg j