Another western U.S. resident is dead because of the plague.

Officials in Utah say an elderly woman has died after contracting the potentially fatal disease earlier this month.  They could not confirm how the woman was infected but speculated that she likely had contact with a dead animal or fleas.

Utah officials would not release the name of the woman or any demographic information other than she was “elderly.”

The Centers for Disease Control (CDC) says 11 plague cases have been found this year in the U.S. and three patients have died.

“It is unclear why the number of cases in 2015 is higher than usual,” the Centers for Disease Control and Prevention stated in a brief update.

The average number of cases per year is between 5 and 6.

“Health care providers should consider the diagnosis of plague in any patient with compatible signs or symptoms, residence or travel in the western United States, and recent proximity to rodent habitats or direct contact with rodents or ill domestic animals,” the CDC says in its report.

“In humans, plague is characterized by the sudden onset of fever and malaise, which can be accompanied by abdominal pain, nausea, and vomiting.”