Iowa Code § 138.14: Communicable diseases reported.

The camp operator shall report immediately to the local board of health the name and address of any individual in the camp known to have or suspected of having a communicable disease. Whenever there shall occur in any camp, or portion thereof, a case of suspected food poisoning or an unusual prevalence of any illness in which fever, diarrhea, sore throat, vomiting, or jaundice is a prominent symptom, the camp operator shall report immediately the existence of the condition to the local board of health and the director.