Surveillance Population

Participating ABCs Areas

Total Population: approximately 45 million

U.S. map highlights areas participating in ABCs surveillance.

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 pdf icon[2 pages]

Surveillance Population Matrix, 1997–2021 pdf icon[88 pages]

ABCs Isolates Sent by Surveillance Areas, 1997–2021 pdf icon[5 pages]

 

Active Bacterial Core Surveillance Matrix by State and Pathogen
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.


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