Hampden-Sydney College SealFARMVILLE, Va. (AP) _ Hampden-Sydney College is canceling classes until Monday after an illness sickened more than 300 students this week. An email to faculty and students on Thursday says residence halls and some areas will remain open. But there will be no classes and administrative offices will be closed. All sporting events and recreational facilities at the school of about 1,050 male students also will be closed. Hampden-Sydney hopes to re-open on Monday, weather permitting. Health officials believe the illness is gastroenteritis, an intestinal infection. Symptoms have included vomiting, diarrhea and dehydration. The school says students began seeking treatment Tuesday night at the school’s wellness center and an area hospital.  Students are being advised to wash their hands frequently or use hand sanitizer, and to avoid sharing items with other people.