Andy, They probably came in on clothing, and unable to attach themselves to a host ( you) dropped free. Kentucky has had it's share of odd problems lately. The horse community lost many foals to an unknown agent last year. It is now thought a unusual number of chokecherries created toxic abortions. I would merely be diligent. Contact the local health department and inquire about any concerns, ie lymne disease or other diseases carried by ticks,fleas etc. in your area and the warning signs. We have them out here also. There is a bumper crop in ground squirrels. I am told by Ag reps the strychnine bates used for control are being held in port by the F.B.I. They are manufactured in India. Something about averting potential terrorist use.