Article

European Journal of Clinical Microbiology & Infectious Diseases

, 27:89

First online:

Population-based laboratory surveillance for Serratia species isolates in a large Canadian health region

  • K. B. LauplandAffiliated withDepartment of Medicine, University of Calgary and Calgary Health RegionDepartment of Pathology and Laboratory Medicine, University of Calgary and Calgary Health RegionDepartment of Community Health Sciences, University of CalgaryCentre for Anti-Microbial Resistance, University of Calgary, Calgary Health Region, and Calgary Laboratory ServicesFoothills Medical Centre Email author 
  • , M. D. ParkinsAffiliated withDepartment of Medicine, University of Calgary and Calgary Health Region
  • , D. B. GregsonAffiliated withDepartment of Medicine, University of Calgary and Calgary Health RegionDepartment of Pathology and Laboratory Medicine, University of Calgary and Calgary Health RegionDivision of Microbiology, Calgary Laboratory Services
  • , D. L. ChurchAffiliated withDepartment of Medicine, University of Calgary and Calgary Health RegionDepartment of Pathology and Laboratory Medicine, University of Calgary and Calgary Health RegionDivision of Microbiology, Calgary Laboratory Services
  • , T. RossAffiliated withDivision of Microbiology, Calgary Laboratory ServicesCentre for Anti-Microbial Resistance, University of Calgary, Calgary Health Region, and Calgary Laboratory Services
  • , J. D. D. PitoutAffiliated withDepartment of Pathology and Laboratory Medicine, University of Calgary and Calgary Health RegionDepartment of Microbiology and Infectious Diseases, University of CalgaryDivision of Microbiology, Calgary Laboratory Services

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Abstract

A population-based laboratory surveillance was conducted during a six-year period to define the incidence, demographic risk factors for acquisition, and anti-microbial susceptibilities of Serratia species isolates. A total of 715 incident Serratia species isolates were identified for an annual incidence of 10.8 per 100,000 residents; bacteremic disease occurred in 0.9 per 100,000 residents annually. The incidence increased with advancing age and males were at the highest risk. Ninety-two percent of the isolates were Serratia marcescens, and the majority (65%) of incident Serratia species isolates were of community onset. Ninety-five percent of isolates were susceptible to ciprofloxacin, 98% to gentamicin, 98% to trimethoprim/sulfamethoxazole, and >99% to imipenem. No yearly increase in resistance was observed. Serratia species isolation is most commonly of community onset and older patients and males are at increased risk. Despite reports of increasing resistance among Serratia species, the incidence in our region remains at a low stable rate.