Invasive Group B Streptococcal Disease Among Nonpregnant Adults: Alaska, 2004–2023

Abstract

We describe the epidemiology of invasive group B streptococcal (GBS) disease among nonpregnant Alaska adults using statewide surveillance data. During 2004–2023, 880 cases of invasive GBS disease were reported for an age-adjusted annual incidence of 9.1 (95% confidence interval [CI], 8.5–9.7) cases per 100 000 adults. Incidence increased 1.9-fold (95% CI, 1.6–2.2) between 2004–2013 and 2014–2023. Adults aged ≥65 years had a 4.4-fold higher risk of invasive disease compared to younger adults, and 47% of adults with invasive GBS had diabetes. Health care providers should be aware of populations at increased risk, potentially allowing for more prompt treatment.