Police have arrested a fast-food worker they say was suffering from herpes and spat on an officer's burger.

Spokesman for the Baton Rouge Police Department, Cpl. Don Coppola, tells The Advocate 21-year-old Elijah Johnson was booked Sunday on counts including mingling harmful substances.

Coppola says a lieutenant noticed what looked like spit on the top of a burger he ordered at a Dairy Queen. He says a surveillance video showed that Johnson grabbed a bun, walked off to the side, brought the burger up to his mouth and walked back to finish making the burger.

Coppola also says the saliva is being tested to see if it matches Johnson. According to Coppola, Johnson admitted he suffers from herpes.

Online jail records do not list an attorney for Johnson.