Haemophilus influenzae meningitis in the presence of a cerebrospinal fluid shunt.

Haemophilus influenzae meningitis in the presence of a cerebrospinal fluid shunt has been reported uncommonly. Staphylococcus aureus and Staphylococcus epidermidis, the most common etiological agents, are usually acquired by contiguous spread from an intraoperative or perioperative source. These infections usually occur within 2 months of shunt insertion and are rarely associated with bacteremia. Review of the literature shows that infection with H. influenzae typically occurs later than with the more common pathogens, is commonly associated with bacteremia, and frequently can be treated with antibiotics alone.