Giardiasis Statistics - Minnesota Dept. of Health

Giardiasis Statistics

From 2008 to 2017 there were 6,813 cases of giardiasis reported in Minnesota.

During 2017, 643 cases of Giardia infection (11.7 per 100,000) were reported. This represents a 4% decrease from the median number of cases reported annually from 2007 through 2016 (median, 667 cases; range, 620 to 904). Recent immigrants and refugees accounted for 28% of all cases. An additional 15% of cases reported international travel in the 3 weeks prior to illness onset. Excluding recent immigrants and refugees, the median age of cases was 39 years (range, 7 months to 95 years). Sixteen percent were <10 years of age, and 36% were >50 years of age. Sixty percent of non-immigrant and refugee cases were male. Giardia infections showed a summer/fall seasonality; 46% of non-immigrant and refugee cases occurred during July through October. Forty-two (6.5%) cases required hospitalization, for a median of 4 days (range, 1 to 56 days). Two outbreaks were identified that accounted for three laboratory-confirmed cases. One was an outbreak associated with person-to-person transmission at a child care center, and the other was an outbreak probably associated with consumption of surface water along a Lake Superior hiking trail.

Charts and graphs:

Annual summaries:

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Updated Friday, 25-May-2018 14:03:05 CDT