The group A streptococcus bacterium (Streptococcus pyogenes) is a form of Streptococcus bacteria responsible for most cases of streptococcal illness. Other types (B, C, D, and G) may also cause infection. Group B streptococci cause most streptococcal infections in newborns and maternal post-labor/delivery infections.

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"Scarlet fever" is also a term denoting the condition of having strong lov ...
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