Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Data reflect cases of Hib disease among children less than 5 years of age submitted to Active Bacterial Core surveillance.
The Active Bacterial Core surveillance (ABCs) system is an active laboratory and population-based surveillance system that provides reports of H. influenzae cases from all or parts of 10 states in the United States. ABCs is supported by the CDC as part of its Emerging Infections Program network. The population under surveillance was 36,748,349 in 2009 (representing 12.0% of the US population).
A case was defined as isolation of H. influenzae from a normally sterile body site (eg, blood or cerebrospinal fluid) in a person aged <5 years. Illness outcome was based on patient status at the time of hospital discharge. Serotyping of H. influenzae was performed by using slide agglutination or polymerase chain reaction. All isolates from ABCs sites were sent to the CDC, where serotype was confirmed by using slide agglutination, Haemophilus quad identification plates or API Neisseria-Haemophilus strips, and polymerase chain reaction. The CDC result was used as the final serotype in the ABCs data set. This measure includes confirmed cases of H. influenzae type b disease.
Any change to the objective text, baseline, target, target-setting method or data source since the Healthy People 2020 launch.
The objective statement was changed from "aged 5 years or under" to "under age 5 years" to make the age group consistent with the numerator definition.
The NNDSS data source was removed. NNDSS data were insufficient to assess Hib with any degree of confidence because Haemophilus influenzae serotyping information was often missing.
Additional resources about the objective.
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