DAYTONA BEACH, Fla. -

Health officials issued a swimming advisory on Wednesday for the Silver Beach Avenue area because of elevated bacteria in the water.

“We typically see elevated bacteria levels during this time of year due to increased migratory bird populations,” Dr. Bonnie J. Sorensen, director of the Florida Department of Health in Volusia County, said in a release.

Bacteria levels were lower at all other sites tested in the 40 miles of beach area.

Water samples are analyzed for enterococci bacteria, which can be found in the intestinal tract of humans and other animals. Associated bacteria can cause gastrointestinal illness, upper respiratory infections, or skin infections if open wounds or sores exist.