San Diego County officials say three squirrels have tested positive for plague in routine monitoring on Palomar Mountain.
County environmental health director Jack Miller says it's not unusual for animals to test positive for plague during the summer months, and the public should avoid contact with squirrels at public campgrounds.
There was a low risk for transmission of plague from the infected squirrels because they didn't carry large numbers of the fleas that can transmit the disease to other squirrels and humans.
The squirrels were found at Cedar Grove Campground and Doane Campground.
To date, no cases of the plague in the human population have been reported to county officials.
