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Escherichia coli bacteria normally live in the lower intestines of healthy people and animals. Most varieties of E. coli are harmless, but certain types of E. coli are among the most frequent bacterial causes of diarrhea. This report summarizes the counts, rates, and trends of E. coli gastrointestinal infections in active component service members over the past 10 years. Findings: •	During 2007 – 2016, there were 290 incident cases of E. coli infection among active duty service members •	The overall incidence rate was 2.3 cases per 100,000 person-years (p-yrs) •	Annual incidence rates peaked at 4.7 cases per 100,000 p-yrs. in 2016 •	Cases were shown to peak during warmer months Overall rates were higher for: •	Persons aged 50 years or older •	Persons aged 25-29 years •	Females at twice the rate of males •	Non-Hispanic white service members •	Air Force members •	Service members in healthcare occupations Two graphs appear on infographic: One graph shows the annual numbers of incident cases and incidence rates of E. coli infection, active component, U.S. Armed Forces, 2007 – 2016. The second graph shows the cumulative number of incident cases of E. coli infection by calendar month, active component, U.S. Armed Forces, 2007 – 2016. Access the report in MSMR Vol. 24 No. 6 – June 2017 at Health.mil/MSMR

This report summarizes the counts, rates, and trends of Escherichia coli gastrointestinal infections in active component service members over the past 10 years.

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Armed Forces Health Surveillance Branch

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