WOODSTOCK – A Woodstock woman bitten by a tick has been hospitalized with Rocky Mountain spotted fever, according to the McHenry County Department of Health.

The confirmed case is the first in the county since May 2008, when seven tick-transmitted illnesses were reported over a two-week span, according to health department officials. That included five cases of Lyme disease and separate cases of spotted fever and ehrlichiosis.

It is unknown when and where the infected tick bit the woman, health department spokeswoman Debra Quackenbush said. The woman’s prior medical history is also unknown.