Haemophilus influenzae type B is responsible for approximately 95% of serious H influenzae infections in children.1 However, other typeable H influenzae strains also have been reported to cause serious infections. Types A, E, and F have been isolated from the CSF of children with meningitis.2-4 Type E has been associated with septic arthritis.5 Types C, D, and F have been isolated from the blood or pleural fluid of adults with pneumonia.6
Sell et al7 recovered H influenzae type C from the nasopharynx of normal children and from Three children with upper respiratory tract illnesses. We report a child in whom H influenzae type C was isolated from a lung abscess.
Report of a Case.—A 5½-year-old boy was seen by his private physician following a one-day history of fever and abdominal pain. A chest roentgenogram revealed a right lower lobe abscess, and therapy with cloxacillin