In 2011, there were seven 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 2011 had symptom onset dates from February to November. Cases ranged from age 9 to 81, with a median age of 35. Five cases are male and two female.
For more detailed information and statistics on all notifiable diseases, please see our current annual report.