In this retrospective epidemiologic study, we present pneumococcal carriage data from 109 Swedish day care centers over a period of 10 years. Aspects of season, age, personnel and group size were studied. We found a significant seasonal variation in pneumococcal carriage. Group size was a significant risk factor for pneumococcal carriage. Pneumococcal carriage was 4.5 % in personnel.
From the *Infectious Disease Unit, Department of Clinical Sciences, Skåne University Hospital, Malmö; †Medical Microbiology, Department of Laboratory Medicine, Lund University, Malmö; ‡Department of Infection Control, Laboratory Medicine; and §Regional Office of Communicable Disease Control and Prevention, Region Skåne, Sweden.
Accepted for publication October 18, 2013.
This work has been supported by Skåne county council’s research and development foundation. Jonas Ahl is member of Pfizer`s Swedish pneumococcal advisory board. The authors have no other funding or conflicts of interest to disclose.
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Address for correspondence: Jonas Ahl, MD, PhD, Infectious Diseases Unit, Department of Clinical Sciences, Ruth Lundskogs gata 3, Skåne University Hospital, 205 02 Malmö, Sweden. E-mail: email@example.com.