As used in this chapter unless the context or subject matter otherwise provides:
1. "Board" means the board of commissioners of a vector control district.
2. "Department" means the department of health and human services.
3. "Health officer" means the state health officer.
4. "Potential or emergency health hazard" means a potential or existing infestation by public health vectors that is detrimental to human health and well-being.
5. "Public health vectors" means all species of mosquitoes and flies.