From 2007 to 2016, there were 7,076 cases of giardiasis reported in Minnesota.
In 2016, 655 giardiasis cases (11.9 per 100,000 population) were reported. Recent immigrants and refugees continue to represent a substantial proportion of cases, accounting for 37% of all cases. An additional 12% of cases reported international travel in the 3 weeks prior to illness onset. Excluding recent immigrants and refugees, the median age for all cases reported in 2016 was 38 years (range, 6 months to 84 years). Fifteen percent of cases were <10 years of age, and 33% were >50 years of age. Fifty-seven percent of non-immigrant and refugee cases were male. Giardia infections showed a summer/fall seasonality; 52% of non-immigrant and refugee cases occurred during July through October. One outbreak of giardiasis was identified in Minnesota in 2016 that accounted for 2 laboratory-confirmed cases. The outbreak occurred among a group of campers who drank improperly treated surface water along a Lake Superior hiking trail.
Charts and graphs:
- Reported Cases of Giardiasis in Minnesota, 2007-2016 (PDF)
Bar graph showing the number of reported giardiasis cases in Minnesota.
- Giardiasis, 2015
Minnesota Department of Health Disease Control Newsletter, Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health.
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