Staphylococcus aureus bacteremia among the elderly is associated with high mortality. Both total mortality and mortality directly attributable to SAB are more than twice as likely in older patients. Infection with methicillin-resistant S aureus carries a worse prognosis than infection with methicillin-sensitive S aureus in the elderly.
SAB in cancer patients is associated with significant morbidity from frequent metastatic infections or conditions including IE, as well as considerable mortality. Unknown initial infection site and 72-hour surveillance cultures positive for organisms were predictive of a complicated course and poor final outcome.
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