CDC tracks invasive Haemophilus influenzae, including type b or Hib, disease using two surveillance systems. Invasive disease refers to when the bacteria invade parts of the body, like blood, that are normally free from germs. CDC does not track non-invasive H. influenzae disease, such as ear infections.
National Notifiable Diseases Surveillance System
CDC conducts national surveillance for invasive H. influenzae, including Hib, disease through the National Notifiable Diseases Surveillance System (NNDSS). CDC receives NNDSS data weekly regarding cases of nationally notifiable diseases.
Analyze and visualize ABCs H. influenzae data using Bact Facts Interactive.
Active Bacterial Core surveillance
CDC also tracks invasive H. influenzae, including Hib, disease with active laboratory-based surveillance through Active Bacterial Core surveillance (ABCs). As part of the Emerging Infections Program, ABCs aims to:
- Determine the incidence and epidemiologic characteristics of invasive H. influenzae disease
- Monitor impact of the Hib vaccination program
- Detect possible emergence of disease due to non-type b H. influenzae
- Determine appropriate verification and validation criteria for serotyping