Hospitals warned about rare infection emerging in Calgary

25-Dec-2025

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Alberta health officials are flagging the circulation of a rare bacteria known as Haemophilus influenzae type b (Hib) among homeless adults living in Calgary.

A memo to emergency departments and urgent care workers from Primary and Preventative Health Services obtained by CBC News warns of a “cluster of invasive Hib cases caused by a genetically distinct sequence type."

“This strain has previously been reported in British Columbia and is now appearing in our region among adults experiencing homelessness or unstable housing,” the memo reads.