Abstract
Prospective population-based surveillance to assess the epidemiology of invasive pneumococcal disease (IPD) in hematopoietic stem cell transplant (HSCT) patients is limited and a comparison to the general population is lacking. By using a population-based Invasive Bacterial Diseases Network surveillance program, we studied the incidence, clinical significance, serotypes and antimicrobial resistance of IPD in a large cohort of adult HSCT patients and the general population. Streptococcus pneumoniae isolates and patient data were collected prospectively from 1995 to 2004. We identified 14 cases of IPD (based on sterile site isolates) in our HSCT population over a 10-year period. This translated to an incidence rate of 347 infections per 100 000 persons per year. This compared to an incidence of 11.5 per 100 000 persons per year in the general population (regression ratio=30.2; 95% confidence interval (CI) 17.8–50.8, P<0.00001). If nonsterile site isolates (respiratory tract) were included, the incidence rate in transplant patients was 446 per 100 000 persons per year. Serotypes 23F and 6B were most common; 100 and 69.2% of isolates were a serotype included in the pneumococcal polysaccharide and conjugate vaccines, respectively. The antimicrobial resistance rates were high, especially for trimethoprim/sulfamethoxazole. HSCT recipients are at significantly greater risk for IPD than the general population. Preventative strategies are necessary.
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Acknowledgements
Collaborating investigators in the Toronto Invasive Bacterial Disease Network are as follows: P Da Camara and J Downey, Toronto East General Hospital (Toronto, Canada); HR Devlin, St Michael's Hospital (Toronto); H Dick, Vita-Tech Laboratories (Toronto); IN Gaid and I Kitai, Rouge Valley Health System (Toronto); P Garrod and N Rau, Halton Healthcare Services (Oakville, Canada); R Lovinsky, D Noria, D Rose and J Braithwaite, The Scarborough Hospital (Toronto); F Jamieson, Ontario Public Health Laboratory (Toronto); R Grossman, Credit Valley Hospital (Mississauga, Canada); J Kapala, Gamma Dynacare Laboratories (Toronto); S Krajden, St Joseph's Health Centre (Toronto); KS Lee and M Baqi, Humber River Regional Hospital (Toronto); M Loeb and F Smaill, Hamilton Health Sciences Center (Hamilton, Canada); M Lovgren and G Tyrrell, National Centre for Streptococcus (Edmonton, Canada); AG Matlow, Hospital for Sick Children (Toronto); R McKeown, Peel Region Health Department (Brampton, Canada); B Mederski and K Katz, North York General Hospital (North York, Canada); Z Moloo, D Richardson and C Quan, William Osler Health Care Centre (Brampton); M Naus, British Columbia Centers for Disease Control (Vancouver, Canada); K Ostrowska and A Sarabia, Trillium Health Centre (Mississauga); P Shokry and I Ephtimios, Markham Stouffville Hospital (Markham, Canada); AE Simor and M Vearncombe, Sunnybrook and Women's College Health Science Centre (Toronto); D Sturman, Bridgepoint Hospital (Toronto); P Van Nostrand, The Rehabilitation Institute of Toronto (Toronto); S Walmsley, University Health Network (Toronto); D Low, B Willey and S Pong-Porter, Toronto Medical Labs/Mount Sinai Hospital (Toronto); B Yaffe, City of Toronto Public Health (Toronto); D Yamamura, MDS Laboratories (Toronto); M Silverman, Lakeridge Health (Oshawa, Canada); R Robertson, Royal Victoria Hospital (Barrie, Canada) and G Volkening, Southlake Regional Health Center (Newmarket, Canada).
Dr Kumar had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
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Kumar, D., Humar, A., Plevneshi, A. et al. Invasive pneumococcal disease in adult hematopoietic stem cell transplant recipients: a decade of prospective population-based surveillance. Bone Marrow Transplant 41, 743–747 (2008). https://doi.org/10.1038/sj.bmt.1705964
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DOI: https://doi.org/10.1038/sj.bmt.1705964
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