An infant with simultaneous beta-lactamase-positive Haemophilus influenzae meningitis and beta-lactamase-negative H. influenzae septicemia, Escherichia coli pyelonephritis and herpes encephalitis.

We describe an infant with meningitis and septicemia due to infection with two different strains of Haemophilus influenzae, with a urinary tract infection due to Escherichia coli and in whom herpes virus encephalitis was diagnosed within three days. Acinetobacter calcoaceticus septicemia developed three weeks later. No immunological deficiency could be demonstrated in the patient who recovered finally, albeit with sequelae due to encephalitis.