Assertion: streptococcus | /r/HasProperty | involved in nearly two thirds of cases
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Source sentences:
text: Streptococci (Streptococcus milleri and Streptococcus viridans) are the most common cause of pyogenic brain abscesses, involved in nearly two thirds of cases, because of their extension from the nasopharynx and oropharynx, as well as from endocarditis (S. viridans).4,19