As used in this chapter:
 1. “Classical swine fever” means the contagious, infectious, and communicable disease of swine commonly known as hog cholera.
 2. “Destroy” means condemn under state authority and slaughter or otherwise kill as a result of or pursuant to such condemnation.
 3. “Exposed” means all swine in physical contact with a known infected herd or tended by a person having direct contact with an infected herd.