Background. Since the introduction of the Haemophilus influenzae serotype b vaccine, H influenzae epidemiology has shifted. In the United States, the largest burden of disease is now in adults aged ≥65 years. However, few data exist on risk factors for disease severity and outcome in this age group. Methods. A retrospective case-series review of invasive H influenzae infections in pat…
Background. Clostridium difficile infection (CDI) is no longer restricted to hospital settings, and populationbased incidence measures are needed. Understanding the determinants of CDI incidence will allow for more meaningful comparisons of rates and accurate national estimates. Methods. Data from active population- and laboratory-based CDI surveillance in 7 US states were used to identify C…