Ampicillin-Resistant Haemophilus influenzae Meningitis Following an Ampicillin-Sensitive Bacteremia in an Infant

6-month-old male infant with left periorbital edema, erythema, and temperature of 40 C, who developed H influenzae bacteremia followed by meningitis.

Ampicillin sodium (200 mg/kg/day) and methicillin sodium (200 mg/kg/day) administered intravenously for six days, followed by oral ampicillin (100 mg/kg/day).

Development of ampicillin-resistant H influenzae meningitis.