The Guilford County Department of Public Health is confirming an increased number of diarrhea illnesses in county child-care centers over the past several weeks. Symptoms of diarrhea, vomiting and fever among children and center workers have occurred in 25 child-care centers, officials said. Some child-care classrooms have experienced multiple incidents of diarrhea.

Six documented cases of laboratory-confirmed rotavirus have been recorded with six children requiring hospitalization. Two documented cases of laboratory-confirmed salmonella have also been recorded, according to officials. A number of unconfirmed cases of rotavirus have been noted.

A letter alerting county pediatricians, family and urgent care practices to this situation was sent Thursday. The letter asks physicians to notify the Department of Public Health if an increase in diarrhea illness or testing is occurring in their offices.