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The changing epidemiology of group B streptococcus bloodstream infection: a multi-national population-based assessment

Artikel i vetenskaplig tidskrift
Författare M. S. Ballard
H. C. Schonheyder
J. D. Knudsen
O. Lyytikainen
M. Dryden
K. J. Kennedy
L. Valiquette
M. Pinholt
Gunnar Jacobsson
K. B. Laupland
Publicerad i Infectious Diseases
Volym 48
Nummer/häfte 5
Sidor 386-391
ISSN 2374-4235
Publiceringsår 2016
Publicerad vid
Sidor 386-391
Språk en
Länkar dx.doi.org/10.3109/23744235.2015.11...
Ämneskategorier Klinisk immunologi

Sammanfattning

Background Population-based studies conducted in single regions or countries have identified significant changes in the epidemiology of invasive group B streptococcus (GBS) infection. However, no studies have concurrently compared the epidemiology of GBS infections among multiple different regions and countries over time. The study objectives were to define the contemporary incidence and determinants of GBS bloodstream infection (BSI) and assess temporal changes in a multi-national population. Methods Population-based surveillance for GBS BSI was conducted in nine regions in Australia, Canada, Denmark, Sweden, Finland and the UK during 2000-2010. Incidence rates were age- and gender-standardised to the EU population. Results During 114 million patient-years of observation, 3464 cases of GBS BSI were identified for an overall annual incidence of 3.4 patients per 100 000 persons. There were marked differences in the overall (range = 1.8-4.1 per 100 000 person-year) and neonatal (range = 0.19-0.83 per 1000 live births) incidences of GBS BSI observed among the study regions. The overall incidence significantly (p = 0.05) increased. Rates of neonatal disease were stable, while the incidence in individuals older than 60 years doubled (p = 0.003). In patients with detailed data (n = 1018), the most common co-morbidity was diabetes (25%). During the study period, the proportion of cases associated with diabetes increased. Conclusions While marked variability in the incidence of GBS BSI was observed among these regions, it was consistently found that rates increased among older adults, especially in association with diabetes. The burden of this infection may be expected to continue to increase in ageing populations worldwide.

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