Group C Streptococcal Bacteremia: Analysis of 88 Cases

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Abstract
Eighty-eight cases of group C streptococcal bacteremia were reviewed retrospectively. Most patients had underlying diseases (72.7%), predominantly cardiovascular disease (20.5%)or malignancy (20.5%). The infection originated most often from the upper respiratory tract (20.5%), the gastrointestinal tract (18.2%), or the skin (17.1%). Prior exposure to animals or animal products was reported in 23.9% of cases. The most common clinical manifestations of group C streptococcal bacteremia were endocarditis (27.3%), primary bacteremia (22.7%), and meningitis (10.2%). Of streptococcal isolates, 61.4% were not speciated, 19.3% were Streptococcus equisimilis, 17.1% were Streptococcus zooepidemicus, and two (2.3%) were Streptococcus equi. The isolates were sensitive to most antibiotics, and most patients were treated with β-lactam agents. Mortality was high (25.0%), especially among older patients and patients with endocarditis, meningitis, and disseminated infection. Group C streptococcal bacteremia does not differ from bloodstream infection caused by other β-hemolytic streptococci with regard to clinical presentation, treatment, or outcome.

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