Hemophilus influenzae

Meningitis constitutes the major infection associated with H. influenzae. Caution must be used when selecting antibiotic treatment based on MIC data, alone, because bacterial levels in the cerebrospinal fluid are higher than those in the blood, on which MICs are calculated. Certain third-generation cephalosporins are effective in producing maximum killing of H. influenzae in the CSF. This strong bactericidal activity may actually prove to be detrimental, however, by augmenting the inflammatory response, and thus contributing to the complications and the sequelae of meningitis. The addition of an agent to block the exaggerated response may be possible.