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Brain abscess due to Streptococcus acidominimus: first case report
Lawrence A Cone1, Shahin Etebar, Robert B Waterbor
1Department of Medicine, Eisenhower Medical Center, Rancho Mirage, CA 92270, USA. laconemedico@aol.com
Background:
Streptococcus acidominimus resembles Streptococcus viridans, but they can now be differentiated by phenotypic studies. Only a single previous case of pneumonia, pericarditis, and meningitis has been reported.
Case Description:
We recently encountered a patient with brain abscess from which S acidominimus was isolated after initially being recorded as S viridans. Because 49% of all S viridans isolated from abscesses are resistant to beta-lactam antimicrobials, speciation is important as well as in vitro sensitivity testing. Streptococcus acidominimus is ordinarily sensitive to beta-lactams, and the use of ceftriaxone for 6 weeks successfully resulted in cure of the brain abscess.
Conclusion:
The use of speciation in treatment of S viridans should improve clinical outcomes.
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