Abstract
Infections due to Hemophilus influenzae are a major problem in people of all ages. In children, H. influenzae type b is the leading cause of meningitis, the primary cause of epiglottitis, and an important cause of arthritis, cellulitis, and pneumonia. The role of strains of H. influenzae that cannot be typed is less clear. They have been associated prominently with Otitis media in children and with bronchitis in adults who have chronic lung disease. It is possible that they are associated more closely than has previously been realized with invasive disease in adults1 and with lower-respiratory-tract infections in children, especially . . .