Surveillance Population
Total Population: approximately 45 million
Map shows U.S. areas included in the ABCs population. See the matrix below for details.
Surveillance Areas/Isolate Collection
The total population of Active Bacterial Core surveillance (ABCs) for invasive disease is approximately 45 million. However, most states further restrict the population for certain pathogens to ensure complete reporting. The table below summarizes the population under surveillance and isolate collection for each pathogen and state as of June 2021. Unless otherwise noted, surveillance is statewide. ABCs sites collect isolates for all cases included in surveillance areas, except where indicated (*) as different in the table below.
Print-friendly version – Surveillance Population Matrix [2 pages]
Surveillance Population Matrix, 1997–2021 [88 pages]
ABCs Isolates Sent by Surveillance Areas, 1997–2021 [5 pages]
| State | Neisseria meningitidis | Haemophilus influenzae | group B streptococcus | group A streptococcus | Streptococcus pneumoniae |
|---|---|---|---|---|---|
| CA | 3,706,404
(3 county Bay area) |
3,706,404
(3 county Bay area) |
3,706,404
(3 county Bay area) |
3,706,404
(3 county Bay area) |
3,706,404
(3 county Bay area) |
| CO | 2,835,257
(5 county Denver area) |
2,835,257
(5 county Denver area) |
2,835,257
(5 county Denver area) |
2,835,257
(5 county Denver area) |
2,835,257
(5 county Denver area) |
| CT | 3,565,287 | 3,565,287 | 3,565,287
*Isolates only collected for cases < 1 year old |
3,565,287 | 3,565,287 |
| GA | 10,617,423 | 10,617,423 | 5,834,904
(all ages, 20 county Atlanta area) and 56,754 (<1 years outside 20 county metro) Total: 5,891,658 |
5,834,904
(20 county Atlanta area) |
5,834,904
(20 county Atlanta area) |
| MD | 6,045,680 | 6,045,680 | 6,045,680 | 2,749,672
(6 county Baltimore area) |
2,749,672
(6 county Baltimore area) |
| MN | 5,639,632 | 5,639,632 | 5,639,632 | 5,639,632 | 5,639,632 |
| NM | 2,096,829 | 2,096,829 | 2,096,829 | 2,096,829 | 2,096,829 |
| NY | 2,163,175
(7 county Rochester area and 8 county Albany area) |
2,163,175
(7 county Rochester area and 8 county Albany area) |
2,163,175
(7 county Rochester area and 8 county Albany area) *Isolates only collected for cases <90 days old |
2,163,175
(7 county Rochester area and 8 county Albany area) |
2,163,175
(7 county Rochester area and 8 county Albany area) and 50,101 (<5 years in Erie county) Total: 2,213,276 |
| OR | 4,217,737 | 4,217,737 | 1,832,634
(3 county Portland area) |
1,832,634
(3 county Portland area) |
1,832,634
(3 county Portland area) |
| TN | 4,154,029
(20 urban counties) |
4,154,029
(20 urban counties) |
4,154,029
(20 urban counties) *Isolates not collected |
4,154,029
(20 urban counties) |
4,154,029
(20 urban counties) |
| Total | 45,041,453 | 45,041,453 | 37,930,585 | 34,577,823 | 34,627,924 |
CDC retrieved populations from the National Center for Health Statistics bridged-race vintage 2019 postcensal file.