CDC monitors invasive bacterial infections that cause bloodstream infections, sepsis, and meningitis in persons living in the community through Active Bacterial Core surveillance (ABCs). ABCs conducts laboratory- and population-based surveillance for invasive pneumococcal disease (IPD). ABCs serotype data are used to measure the impact of vaccine use in the United States on vaccine-type IPD.

This table reports IPD case counts in the ABCs catchment area by serotype for years 1998 through 2023. Cases are grouped into the following mutually exclusive age groups: age <2 years old, age 2–4 years old, age 5–17 years old, age 18–49 years old, age 50–64 years old, and age ≥65 years old. Cases are reported by ABCs surveillance site (noted as the 2-letter state abbreviation). Combined data for all ABCs sites are labeled as “All_Sites”.

ABCs methods and surveillance areas reporting IPD cases have changed over time. Given these changes, trends in serotype distribution by year, age group, and site should be interpreted with caution. Analyze and visualize data using the ABCs Bact Facts Interactive Data Dashboard.

Tags: active bacterial core surveillance, ipd serotypes, invasive pneumococcal disease serotypes, ipd serotype frequencies, streptococcus pneumoniae serotypes, spn serotypes, abcs, bactfacts

Last updated: 2025-11-14 22:05:46+00:00