ABCs Report: Haemophilus influenzae, 2011
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April 6, 2012: Content on this page kept for historical reasons.
Active Bacterial Core Surveillance (ABCs): Emerging Infections Program Network
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ABCs Areas
California (3 county San Francisco Bay area); Colorado (5 county Denver area); Connecticut; Georgia; Maryland; Minnesota; New Mexico; New York (15 county Rochester and Albany areas); Oregon; Tennessee (20 urban counties)
ABCs Population
The surveillance areas represent 42,421,940 persons. Source: National Center for Health Statistics bridged race vintage 2011 postcensal file
ABCs Case Definition
Invasive Haemophilus influenzae (Hi) disease: isolation of Hi from normally sterile site in a resident of a surveillance area in 2011.
ABCs Methodology
ABCs personnel routinely contacted all microbiology laboratories serving acute care hospitals in their area to identify cases. Standardized case report forms that include information on demographic characteristics, clinical syndrome, and outcome of illness were completed for each identified case. Serotyping was done on Hi isolates at CDC and state laboratories. Regular laboratory audits assessed completeness of active surveillance and detected additional cases.
All rates of invasive Hi disease were calculated using population estimates for 2011. For national estimates, race and age specific rates of disease were applied from the aggregate surveillance areas to the race and age specific distribution of the 2011 U.S. population. Cases with missing data, excluding ethnicity, were multiply imputed using the sequential regression imputation method.¶
Reported ABCs Profiles
Race | No. | (Rate*) |
---|---|---|
White | 537 | (1.7) |
Black | 118 | (1.6) |
Other | 35 | (1.1) |
Total | 690 | (1.6) |
*Cases per 100,000 population for ABCs areas
Syndrome | Cases No. (%*) |
Deaths No. (%†) |
---|---|---|
Meningitis | 54 (7.8) | 1 (1.9) |
Bacteremia without focus | 137 (19.9) | 17 (12.5) |
*Percent of cases
†Deaths per 100 cases
Age (years) | b No. (Rate*) |
Serotype Non-b No. (Rate*) |
Serotype Non-Type† No. (Rate*) |
Unknown No. (Rate*) |
---|---|---|---|---|
<1 | 2 (0.37) | 13 (2.43) | 17 (3.18) | 2 (0.37) |
1 | 0 (0.00) | 5 (0.93) | 7 (1.31) | 0 (0.00) |
2-4 | 1 (0.06) | 3 (0.18) | 4 (0.24) | 4 (0.24) |
5-17 | 0 (0.00) | 7 (0.10) | 12 (0.16) | 3 (0.04) |
18-34 | 2 (0.02) | 10 (0.10) | 36 (0.36) | 5 (0.05) |
35-49 | 0 (0.00) | 18 (0.20) | 30 (0.34) | 11 (0.12) |
50-64 | 3 (0.04) | 39 (0.47) | 92 (1.10) | 14 (0.17) |
≥ 65 | 4 (0.08) | 63 (1.18) | 238 (4.47) | 45 (0.84) |
Total | 12 (0.03) | 158 (0.37) | 436 (1.03) | 84 (0.20) |
*Cases per 100,000 population for ABCs areas
† Non-typeable isolates
National Estimates of Invasive Disease
Cases: 5,175 (1.66/100,000)
Deaths: 720 (0.23/100,000)
Healthy People 2020 Update
Invasive Haemophilus influenzae type b disease
Objective: Decrease the incidence of invasive Haemophilus influenzae type b disease to 0.27 cases per 100,000 persons less than 5 years of age.
Age | 2020 Objective | 2010 Rate* |
---|---|---|
<5 | 0.27/100,000 | 0.09/100,000 |
* Cases per 100,000 U.S. population < 5 years
¶Surveillance Note
At the start of this surveillance year (2011), missing race (n=64) data were multiply imputed using sequential regression imputation methods. Previously, missing race data were distributed in the same proportion as known cases.
Citation
Centers for Disease Control and Prevention. 2012. Active Bacterial Core Surveillance Report, Emerging Infections Program Network, Haemophilus influenza 2011.
- Page last reviewed: April 6, 2012 (archived document)
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