KINGMAN, Kan. (AP) — A south-central Kansas county is investigating its first case of whooping cough in a decade. Kingman County officials say a student at Kingman High School came down with the illness on March 27. The student currently is being treated at home. The Hutchinson News reports that 25 to 30 people who were in close contact with the teenager are being treated with an antibiotic. Kingman County Health Department spokeswoman Mary Schwartz says those people will be tracked for 21 days. The department also is working closely with the school to watch for more cases. Outbreaks of the disease have been reported this year in Barton and Sedgwick counties.