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Canadian Journal of Infectious Diseases and Medical Microbiology
Volume 25, Issue 6, Pages e87-e89
Case Report

The First case of Locally Acquired Tick-Borne Babesia Microti Infection in Canada

Jared MP Bullard,1,2,3 Arshad N Ahsanuddin,4 Anamarija M Perry,4 L Robbin Lindsay,2,5 Mahmood Iranpour,5 Antonia Dibernardo,5 and Paul G Van Caeseele1,2,3

1Cadham Provincial Laboratory, Manitoba Health, Winnipeg, Manitoba, Canada
2Department of Medical Microbiology, Winnipeg, Manitoba, Canada
3Department of Paediatrics and Child Health, Winnipeg, Manitoba, Canada
4Department of Pathology, University of Manitoba, Winnipeg, Manitoba, Canada
5Zoonotic Diseases and Special Pathogens, National Microbiology Laboratory, Winnipeg, Manitoba, Canada

Copyright © 2014 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A child with a complicated medical history that included asplenia acquired an infection with Babesia microti in the summer of 2013 and had not travelled outside of Manitoba. Although the clinical findings were subtle, astute laboratory work helped to reach a preliminary identification of Babesia species, while reference laboratory testing confirmed the diagnosis. Blacklegged ticks (Ixodes scapularis) are known to transmit Borrelia burgdorferi and Anaplasma phagocytophilum in the province; however, the present case represents the first known instance of tick-borne B microti, both in Manitoba and in Canada. The expanding territory of the blacklegged tick increases the relevance of this emerging infection. Clinicians, laboratory medical practitioners and public health officials should be aware of B microti as a potential locally acquired infection in Canada.