San Diego County public health employees collected two mice from trails around San Onofre State Beach that tested positive for hantavirus, it was announced Monday.

The potentially deadly hantavirus has been detected in two mice at San Onofre State Beach, San Diego County officials said Monday.

Two mice collected from a campground trail at San Onofre State Beach as part of ongoing surveillance to protect public health have tested positive for the potentially deadly hantavirus. County Vector Control team is working with campground officials to notify campground visitors and staff.

In addition to San Diego, wastewater bird flu detections in California included west Contra Costa County on June 10, Turlock on Sept. 4, southeast San Francisco on June 18 and June 26 and Palo Alto on July 4, July 9 and June 19.