Health officials say they have located what might be Michigan's first case of swine flu.

The state Department of Community Health said Monday the "probable" case involves a 34-year-old woman in Livingston County.

Click for more about the swine flu.

Lab results will be sent to the U.S. Centers for Disease Control and Prevention to determine if they test positive for the virus.

The DCH says the woman recently traveled to the Texas and Mexican border and experienced flu-like symptoms. She is recovering at home.

The United States launched border screening Monday morning for swine flu exposure. Officials will ask people about fever and illness and look for those who are ill.

Twenty cases of swine flu have been confirmed in the U.S.