ADAMS, Wis. (AP) – An Adams-Friendship elementary school has run a battery of tests to determine why two dozen students and several staff members have experienced skin irritation, and in some cases, headaches and nausea. The school district says the fire department has tested for carbon dioxide, hydrogen sulfide and carbon monoxide. WSAW-TV ( ) reports the air quality was found to be acceptable.  A letter sent home to parents says that beginning late last week, an increasing number of students at Adams-Friendship Elementary School developed hives, rashes, and itchy skin. A smaller number of students have experienced headaches and nausea. The school says it has thoroughly cleaned the classrooms. The Adams County Health Department has gotten involved. And, Principal Garret Gould says the school is collaborating with the county to contact an environmental specialist.

—  Information from: WSAW-TV,