In 2012, there were eight cases of Rocky Mountain spotted fever (RMSF) reported in Iowa. American dog ticks are carriers of Rickettsia rickettsii, the bacterium that causes RMSF. The American dog tick is the most common species of tick in Iowa and can be found in every county in the state. The tick is most active late March through August. Iowa RMSF cases in 2012 had symptom onset dates from March to November. Cases ranged from ages four to 70, with a median age of 39. Sixty-three percent of cases were female. Five of the eight cases were hospitalized.
For more detailed information and statistics on all notifiable diseases, please see our current annual report.